{"title":"Vacuum Tubes","description":"\u003cp\u003eVacuum Tubes for Pre-amps, Power amps, and Rectifiers. New and vintage.\u003c\/p\u003e","products":[{"product_id":"apos-ray-tube-12au7","title":"Ray Tubes 12AU7 SELECT Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the CORE Collection but makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what factory vacuum tubes can offer.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eMake Your Good Amp Great\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eThe SELECT Vacuum Tube Difference\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eDespite originating from the same batches as Ray Tubes CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch they're built to last.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes  commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eAn exceptional 12-month warranty rarity in the world of vacuum tubes, especially NOS vacuum tubes reflects Ray Tubes confidence in their vacuum tubes performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 12AU7\/ECC82\/6189\/CV4003\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhat's included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Vacuum Tubes OR Single Ray Vacuum Tube\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-compatible-amps\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatured reviews\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/ZNqgM1aO-pc?si=4WkvYgCHVmR3ghHA\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"They add an overall veil of comfy.\" -Zeos Pantera\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/7NYbKuCVuQQ?si=r-GfaSVb3Y1cmHqD\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"Resolving...clear-sounding...you can hear more music and less noise...tight...smooth....warm....I do believe these are worth it if you want to improve the sound of your amplifier.\" -SoundNews\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/GXywsB0ZHUo?si=p9NiaUgZVoaCuChv\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"A brilliant, brilliant new production tube. I don't have anything negative to say. I can't find any cons or negative with the Apos Ray tubes.\" -Passion for Sound\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/a4v-XwlOWCM?si=NXfvPPvbYFy3vJ_6\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"In one word: coherent...compared to stock tubes they're more clear. They have a more well-defined and solid bass response. The real differences lie in the upper mid-range and treble response. The fidelity of the upper mid-range is actually quite significantly better than that of the stock tubes....the sound-staging width is a lot more substantial.\" -Joshua Valour\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/xoHtxWJCPmA?si=uVaUTDsojt-FSvaX\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"These proved to be so good, so resolving, yet never harsh, never annoying...instead they combine really smooth and natural sounds with higher-resolving, really open, really spacious sounds that we expect from great tubes.\" -iiWi Reviews\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/3CidxsiPeuw?si=q49p-EWYYgMZECsL\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003cem\u003e\"If any really high-end tube device users out there are wondering 'Are those Ray tubes any good?' Yes. Yes they are. They are really good.\" -Wave Theory\u003c\/em\u003e\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Matched Pair (2 tubes)","offer_id":44090522468588,"sku":"APS-0745-1","price":224.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":44090522501356,"sku":"APS-0745-2","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 tubes)","offer_id":46758632259820,"sku":"APS-0745-3","price":479.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-12au7-select-vacuum-tube-1209699663.jpg?v=1764700612"},{"product_id":"apos-ray-vacuum-tube-6sn7-select","title":"Ray Tubes 6SN7 SELECT Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.com\/collections\/core\" rel=\"noopener\" target=\"_blank\"\u003eCORE Collection\u003c\/a\u003e but makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eMake Your Good Amp Great\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eThe SELECT Vacuum Tube Difference\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eDespite originating from the same batches as Ray Tubes’ \u003ca href=\"https:\/\/raytubes.com\/collections\/core\" rel=\"noopener\" target=\"_blank\"\u003eCORE Collection\u003c\/a\u003e, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eCeramic Collar: Nothing Better Than a Classic\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eSometimes, doing things the old way is better. And when it comes to building materials, there are few things older than ceramic, which has been beloved by humans for its resilience and heat resistance for over 30,000 years. Ray Tubes chose premium ceramic for the collar of the 6SN7 Select because it’s incredibly resilient against high temperatures, making it an ideal material for vacuum tubes, which can generate a lot of heat during operation. Plus, ceramic is robust against wear and tear, making it able to withstand the rigors of regular use for years to come.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 6SN7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/raytubes.com\/pages\/tube-compatibility-list\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhat's included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eRay Tubes 6SN7 SELECT Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eWith the launch of our Apos Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatured reviews\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/FpeyK1bofMk?si=LSx83K6xnCzF93IX\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"They reveal plenty of details...edges are quick and snappy and very precise, while tone texture is quite obvious...they're very open in high frequencies....the sensation of air and space and big soundstage is great.\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e-iiWi Reviews\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/GbAypaOuAtU?si=sn2W3I4-rYF0kXhH\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/em\u003e\u003cem\u003e\"It's not quite as thick and full as other tubes I've heard. It has a more airy presentation....it has more of a focus on details and resolution and tone and timbre....and it has a great width and depth and layering. I was rather impressed.\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e-The Honest Audiophile\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"Quite a revelation. Never in the past have a heard such a significant change from stock tubes. They romanticize the sound, move away from clinical exactness and favor a musical presentation. They provide lush tubiness.\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e-Prime Audio Reviews\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/NUJvu0hsdEk?si=oEt5JM97YbdDp4Te\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/em\u003e\u003cem\u003e\"Clean-sounding, dynamic, and energetic. It's got sparkle and resolution in the top end. I love the balance it brings. The bass is full and tight and full of body. A great sense of texture and clarity at the top end. I like that it's neutral-sounding.\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e-Passion for Sound\u003c\/em\u003e\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":44140644532460,"sku":"APS-0821-1","price":81.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":44198665060588,"sku":"APS-0821-2","price":186.0,"currency_code":"USD","in_stock":true},{"title":"Matching Quad (4 tubes)","offer_id":44198665093356,"sku":"APS-0821-3","price":407.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-6sn7-select-vacuum-tube-1209699639.jpg?v=1764700485"},{"product_id":"apos-ray-vacuum-tube-6sn7-reserve","title":"Ray Tubes 6SN7 RESERVE Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eThe Best of the Best\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe RESERVE Collection of Ray vacuum tubes are artfully designed and carefully manufactured solely for hifi audiophile devices. With the RESERVE, vocals are a revelation: smooth, lifelike, and beautifully present. They convey a sense of realism and immediacy without any bloat, offering a gentle yet compelling delivery with superior decay. The treble is crisp yet laid-baid, carefully balanced to avoid sibilance or harshness. This balanced sound signature extends to the low-end as well: full and commanding, contributing to an overall superbly realistic imaging that is brain-scratchingly good.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEngineered Exclusively for Audiophile Systems\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplicitly engineered for audiophile applications, the RESERVE Collection of vacuum tubes are crafted through a unique process that targets the specific needs of audiophiles, focusing on critical sound characteristics such as vocal realism, texture, and extended bass. Every aspect of their design and manufacture is aimed at enhancing the listening experience in high-fidelity systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEnsuring Excellence\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eEvery vacuum tube in the RESERVE Collection is subjected to a stringent quality assurance process. An audio engineer personally assesses each vacuum tube against a detailed checklist that includes sound profile, dynamics, microphonics, gain, conductance, and noise levels, along with overall performance. This ensures not only that the vacuum tubes align with audiophile expectations for sound quality but also that they meet our rigorous standards for reliability and consistency. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch, they're built to last.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"h2\"\u003e\u003cstrong\u003eMagic Coating\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSome things are better left unseen. You can't see inside the RESERVE tube because it's coated with something called monocrystalline carbon. This layer allows for quicker electron transmission, keeps the glass cool, and blocks out noise. If you've got an engineering background, you might find the science fascinating. For the rest of us, it's basically magic. The coating is delicate and tough to apply, which complicates production. That's why Ray only uses it for their RESERVE tubes and why it costs more. When all is said and done, it just means one thing- the sound is amazing.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eRay Tubes offers an exceptional 12-month warranty, a rarity in the world of vacuum tubes (especially NOS tubes). This reflects their confidence in the performance and durability of their products. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eRay Tubes Quality Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFrom extensive burn-in to expert listening sessions, Ray Tubes goes above and beyond to guarantee each tube they sell is ready for your high-end system. \u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/blogs\/news\/ray-tubes-1-year-warranty-quality-control\" target=\"_blank\"\u003eRead more about the process on their blog.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 6SN7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhats included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eRay Tubes 6SN7 RESERVE Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-compatible-amps\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/howto-maintain-vacuum-tubes\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/tube-rolling-guide\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/why-upgrade-your-tubes\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatured reviews\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/IH1CvoU-qWo?si=L8iCr0Nubt5je9mk\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"These may very well be the best vacuum tubes I've ever had the privilege of listening to.\" -Wave Theory\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/3CidxsiPeuw?si=q49p-EWYYgMZECsL\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/em\u003e\u003cem\u003e\"If any really high-end tube device users out there are wondering 'Are those Ray tubes any good?' Yes. Yes they are. They are really good.\" -Wave Theory\u003c\/em\u003e\u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":44335842558188,"sku":"APS-0835-1","price":259.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":44335842590956,"sku":"APS-0835-2","price":589.0,"currency_code":"USD","in_stock":true},{"title":"Matching Quad (4 tubes)","offer_id":44335842623724,"sku":"APS-0835-3","price":1256.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-6sn7-reserve-vacuum-tube-1209699686.jpg?v=1764700365"},{"product_id":"ray-vacuum-tube-12ax7-select","title":"Ray Tubes 12AX7 SELECT Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eA New Dimension of Sound\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection\u003c\/a\u003e but makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eMake Your Good Amp Great\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eThe SELECT Vacuum Tube Difference\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eDespite originating from the same batches as Ray Tubes’ \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection\u003c\/a\u003e, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 12AX7\/ECC83\/CV4004\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Tubes OR Single Ray Tube\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Matched Pair (2 tubes)","offer_id":44903804469484,"sku":"APS-0882-2","price":224.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":44903804502252,"sku":"APS-0882-1","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 tubes)","offer_id":46758633439468,"sku":"APS-0882-3","price":479.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-12ax7-select-vacuum-tube-1209699655.jpg?v=1764700255"},{"product_id":"ray-vacuum-tube-12ax7-core","title":"Ray Tubes 12AX7 CORE Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eBeyond the Ordinary\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003eRay Tubes’ CORE Collection of vacuum tubes offers the quintessential upgrade for audiophiles ready to move beyond the limitations of standard factory vacuum tubes. Each vacuum tube is hand-selected, with a strict process that allows only the top percentile of a production batch—those that meet and surpass their rigorous standards for gain, conductance, noise, and microphonics—into your audio system.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eChoosing Certainty: Why New Stock is Better\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eWhen you buy our CORE Collection of vacuum tubes, you’re guaranteeing that your listening is enhanced by the best of today’s technology. In contrast, when you buy New Old Stock (NOS) vacuum tubes, you’re venturing into unknown territory. While NOS vacuum tubes carry undeniable vintage charm, they often come with hidden risks. Over time, even unused vacuum tubes (hence the “new” in “new old stock”) can degrade, leading to reliability issues and unpredictable performance. You might face diminished sound quality or even failure, as age affects the components, making them more susceptible to wear and damage. In contrast, Ray’s newly manufactured vacuum tubes carry the latest technological advances and stringent quality controls.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eCurated by Audio Engineers\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe secret behind Ray Tubes’ exceptional sound quality lies in the hands of their dedicated audio engineers. Unlike the impersonal selection process for NOS vacuum tubes, which can be hit or miss in terms of quality, their engineers are deeply involved in every step of choosing their vacuum tubes. They don't just look at specs or conduct standard tests; they listen, evaluate, and hand-select each vacuum tube. This human touch ensures that every vacuum tube Ray produces not only aims to match the vintage experience but significantly surpasses it in reliability and performance.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected. \u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics \u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 12AX7\/ECC83\/CV4004\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Tubes OR Single Ray Tube\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ray Tubes","offers":[{"title":"Matched Pair (2 tubes)","offer_id":44903865155820,"sku":"APS-0883-2","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45574575587564,"sku":"APS-0883-1","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-12ax7-core-vacuum-tube-40587405983980.jpg?v=1741111202"},{"product_id":"ray-tubes-12au7-core-vacuum-tube","title":"Ray Tubes 12AU7 CORE Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eBeyond the Ordinary\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003eRay Tubes’ CORE Collection of vacuum tubes offers the quintessential upgrade for audiophiles ready to move beyond the limitations of standard factory vacuum tubes. Each vacuum tube is hand-selected, with a strict process that allows only the top percentile of a production batch—those that meet and surpass their rigorous standards for gain, conductance, noise, and microphonics—into your audio system.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eChoosing Certainty: Why New Stock is Better\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eWhen you buy our CORE Collection of vacuum tubes, you’re guaranteeing that your listening is enhanced by the best of today’s technology. In contrast, when you buy New Old Stock (NOS) vacuum tubes, you’re venturing into unknown territory. While NOS vacuum tubes carry undeniable vintage charm, they often come with hidden risks. Over time, even unused vacuum tubes (hence the “new” in “new old stock”) can degrade, leading to reliability issues and unpredictable performance. You might face diminished sound quality or even failure, as age affects the components, making them more susceptible to wear and damage. In contrast, Ray’s newly manufactured vacuum tubes carry the latest technological advances and stringent quality controls.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eCurated by Audio Engineers\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe secret behind Ray Tubes’ exceptional sound quality lies in the hands of their dedicated audio engineers. Unlike the impersonal selection process for NOS vacuum tubes, which can be hit or miss in terms of quality, their engineers are deeply involved in every step of choosing their vacuum tubes. They don't just look at specs or conduct standard tests; they listen, evaluate, and hand-select each vacuum tube. This human touch ensures that every vacuum tube Ray produces not only aims to match the vintage experience but significantly surpasses it in reliability and performance.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: \u003cspan\u003e12AU7\/ECC82\/6189\/CV4003\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhat's included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Vacuum Tubes OR Single Ray Vacuum Tube\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ray Tubes","offers":[{"title":"Matched Pair (2 tubes)","offer_id":44987741077740,"sku":"APS-0886-1","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45574576177388,"sku":"APS-0886-2","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-12au7-core-vacuum-tube-matched-pair-2-tubes-40554293756140.jpg?v=1741111123"},{"product_id":"ray-tubes-kt88-select-vacuum-tube","title":"Ray Tubes KT88 SELECT Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003e\u003cspan\u003eCORE Collection \u003c\/span\u003e\u003c\/a\u003ebut makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDespite originating from the same batches as Ray Tubes' \u003c\/span\u003e\u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003e\u003cspan\u003eCORE Collection\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eGold Pins: Excellence in Every Detail\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eCeramic Collar: Nothing Better Than a Classic\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eSometimes, doing things the old way is better. And when it comes to building materials, there are few things older than ceramic, which has been beloved by humans for its resilience and heat resistance for over 30,000 years. Ray Tubes chose premium ceramic for the collar of the KT88 Select because it’s incredibly resilient against high temperatures, making it an ideal material for vacuum tubes, which can generate a lot of heat during operation. Plus, ceramic is robust against wear and tear, making it able to withstand the rigors of regular use for years to come.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eTube type: KT88\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eCompatible Amps\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eRay Tubes KT88 SELECT Vacuum Tube\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eFeatured reviews\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/8Aqib6g68jM?si=2OhiwDHkOaDLAOia\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/em\u003e\u003cem\u003e\"A really lovely middle ground with a combination of energetic, dynamic and smooth and creamy mids.\" -Passion for Sound\u003c\/em\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Matching Quad (4 tubes)","offer_id":45395661160684,"sku":"APS-0915-3","price":479.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":45395661127916,"sku":"APS-0915-2","price":224.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45395661095148,"sku":"APS-0915-1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-kt88-select-vacuum-tube-1209699696.jpg?v=1764700136"},{"product_id":"ray-tubes-el34-select-vacuum-tube","title":"Ray Tubes EL34 SELECT Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/collections\/core\" target=\"_blank\"\u003eCORE Collection\u003c\/a\u003e but makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eDespite originating from the same batches as Ray Tubes’ \u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/collections\/core\" target=\"_blank\"\u003eCORE Collection\u003c\/a\u003e, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eGold Pins: Excellence in Every Detail\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eTube type: EL34\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eCompatible Amps\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eRay Tubes EL34 SELECT Vacuum Tube\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eFeatured reviews\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cem\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/8Aqib6g68jM?si=V52LbJza5r3jYuKR\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/em\u003e\u003cem\u003e\"Thick, rich, and smooth, like the Mullard EL34, but more crisp and resolving.\" -Passion for Sound\u003c\/em\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Matching Quad (4 tubes)","offer_id":45395666305260,"sku":"APS-0916-3","price":407.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":45395666272492,"sku":"APS-0916-2","price":186.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45395666239724,"sku":"APS-0916-1","price":81.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-el34-select-vacuum-tube-41102780268780.jpg?v=1741111030"},{"product_id":"ray-tubes-kt88-reserve-vacuum-tube","title":"Ray Tubes KT88 RESERVE Vacuum Tube","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e\u003cb\u003eThe Best of the Best\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe RESERVE Collection of Ray vacuum tubes are artfully designed and carefully manufactured solely for hifi audiophile devices. With the RESERVE, vocals are a revelation: smooth, lifelike, and beautifully present. They convey a sense of realism and immediacy without any bloat, offering a gentle yet compelling delivery with superior decay. The treble is crisp yet laid-back, carefully balanced to avoid sibilance or harshness. This balanced sound signature extends to the low-end as well: full and commanding, contributing to an overall superbly realistic imaging that is brain-scratchingly good.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Quads and pairs are backordered until November 24th. \u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEngineered Exclusively for Audiophile Systems\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplicitly engineered for audiophile applications, the RESERVE Collection of vacuum tubes are crafted through a unique process that targets the specific needs of audiophiles, focusing on critical sound characteristics such as vocal realism, texture, and extended bass. Every aspect of their design and manufacture is aimed at enhancing the listening experience in high-fidelity systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEnsuring Excellence\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eEvery vacuum tube in the RESERVE Collection is subjected to a stringent quality assurance process. An audio engineer personally assesses each vacuum tube against a detailed checklist that includes sound profile, dynamics, microphonics, gain, conductance, and noise levels, along with overall performance. This ensures not only that the vacuum tubes align with audiophile expectations for sound quality but also that they meet our rigorous standards for reliability and consistency. \u003c\/span\u003e\u003cb style=\"font-size: 0.875rem;\"\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/span\u003e\u003cb style=\"font-size: 0.875rem;\"\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 class=\"h2\"\u003e\u003cstrong\u003eMagic Coating\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSome things are better left unseen. You can’t see inside the RESERVE tube because it’s coated with something called monocrystalline carbon. This layer allows for quicker electron transmission, keeps the glass cool, and blocks out noise. If you’ve got an engineering background, you might find the science fascinating. For the rest of us, it’s basically magic. The coating is delicate and tough to apply, which complicates production. That’s why Ray only uses it for their RESERVE tubes—and why it costs more. When all’s said and done, it just means one thing—the sound is amazing.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eRay Tubes Quality Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFrom extensive burn-in to expert listening sessions, Ray Tubes goes above and beyond to guarantee each tube they sell is ready for your high-end system. \u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/blogs\/news\/ray-tubes-1-year-warranty-quality-control\" target=\"_blank\"\u003eRead more about the process on their blog.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow noise and microphonics \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTube type: KT88\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhat’s included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRay Tubes KT88 RESERVE Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Matching Quad (4 tubes)","offer_id":45737811738860,"sku":"APS-0972-3","price":1199.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":45737811771628,"sku":"APS-0972-2","price":569.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45737811804396,"sku":"APS-0972-1","price":249.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-kt88-reserve-vacuum-tube-41983331074284.jpg?v=1741110863"},{"product_id":"ray-tubes-12at7-select-vacuum-tube","title":"Ray Tubes 12AT7 SELECT Vacuum Tube","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e\u003cb\u003eA New Dimension of Sound\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection\u003c\/a\u003e but makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eMake Your Good Amp Great\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision. \u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eThe SELECT Vacuum Tube Difference\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eDespite originating from the same batches as Ray Tubes’ \u003cspan style=\"font-weight: 400;\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection\u003c\/a\u003e\u003c\/span\u003e, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected. \u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics \u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 12AT7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Vacuum Tubes OR Single Ray Vacuum Tube\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ray Tubes","offers":[{"title":"Matched Pair (2 tubes)","offer_id":45737814556908,"sku":"APS-0952-2","price":224.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45737814589676,"sku":"APS-0952-1","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 tubes)","offer_id":46758633701612,"sku":"APS-0952-3","price":479.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-12at7-select-vacuum-tube-1209699647.jpg?v=1764699891"},{"product_id":"ray-tubes-el34-reserve-vacuum-tube","title":"Ray Tubes EL34 RESERVE Vacuum Tube","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e\u003cb\u003eThe Best of the Best\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe RESERVE Collection of Ray vacuum tubes are artfully designed and carefully manufactured solely for hifi audiophile devices. With the RESERVE, vocals are a revelation: smooth, lifelike, and beautifully present. They convey a sense of realism and immediacy without any bloat, offering a gentle yet compelling delivery with superior decay. The treble is crisp yet laid-back, carefully balanced to avoid sibilance or harshness. This balanced sound signature extends to the low-end as well: full and commanding, contributing to an overall superbly realistic imaging that is brain-scratchingly good.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEngineered Exclusively for Audiophile Systems\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplicitly engineered for audiophile applications, the RESERVE Collection of vacuum tubes are crafted through a unique process that targets the specific needs of audiophiles, focusing on critical sound characteristics such as vocal realism, texture, and extended bass. Every aspect of their design and manufacture is aimed at enhancing the listening experience in high-fidelity systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEnsuring Excellence\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eEvery vacuum tube in the RESERVE Collection is subjected to a stringent quality assurance process. An audio engineer personally assesses each vacuum tube against a detailed checklist that includes sound profile, dynamics, microphonics, gain, conductance, and noise levels, along with overall performance. This ensures not only that the vacuum tubes align with audiophile expectations for sound quality but also that they meet our rigorous standards for reliability and consistency.\u003c\/span\u003e\u003cb style=\"font-size: 0.875rem;\"\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/span\u003e\u003cb style=\"font-size: 0.875rem;\"\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 class=\"h2\"\u003e\u003cstrong\u003eMagic Coating\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSome things are better left unseen. You can’t see inside the RESERVE tube because it’s coated with something called monocrystalline carbon. This layer allows for quicker electron transmission, keeps the glass cool, and blocks out noise. If you’ve got an engineering background, you might find the science fascinating. For the rest of us, it’s basically magic. The coating is delicate and tough to apply, which complicates production. That’s why Ray only uses it for their RESERVE tubes—and why it costs more. When all’s said and done, it just means one thing—the sound is amazing.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eRay Tubes Quality Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFrom extensive burn-in to expert listening sessions, Ray Tubes goes above and beyond to guarantee each tube they sell is ready for your high-end system. \u003ca href=\"https:\/\/raytubes.audio\/blogs\/news\/ray-tubes-1-year-warranty-quality-control\" rel=\"noopener\" target=\"_blank\"\u003eRead more about the process on their blog.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMagic Coating: Monocrystalline carbon coating enhances sound by\u003cbr\u003ecooling, blocking noise, and allowing for quicker electron transmission\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow noise and microphonics \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched quad (4 tubes) or pair (2 tubes) or single tube (1 tube)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTube type: EL34\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eMax Anode Dissipation Power: 25 W\u003c\/li\u003e\n\u003cli\u003eMax Screen Dissipation Power: 8 W\u003c\/li\u003e\n\u003cli\u003eOutput Power in Class A1 Amp (Single Tube): Greater than 10 W\u003c\/li\u003e\n\u003cli\u003eOutput Power in Class AB1 Amp: Greater than 35 W\u003c\/li\u003e\n\u003cli\u003eMax Anode Voltage: 800 V\u003c\/li\u003e\n\u003cli\u003eMax Screen Voltage: 500 V\u003c\/li\u003e\n\u003cli\u003eMax Grid Voltage: ~12.2 V\u003c\/li\u003e\n\u003cli\u003eHeater Voltage: 6.3 V\u003c\/li\u003e\n\u003cli\u003eHeater Current: 1.5 A\u003c\/li\u003e\n\u003cli\u003eTransconductance: 11 mA\/V\u003c\/li\u003e\n\u003cli\u003eAmplification Factor: 11\u003c\/li\u003e\n\u003cli\u003eInternal Resistance: 15 kΩ\u003c\/li\u003e\n\u003cli\u003eTetrode Connection\n\u003cul\u003e\n\u003cli\u003eScreen Voltage: 250 V\u003c\/li\u003e\n\u003cli\u003eAnode Voltage: 250 V\u003c\/li\u003e\n\u003cli\u003eAnode Current: 100 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhat's included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRay Tubes EL34 RESERVE Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUser handbook featuring burn-in guidelines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCertificate of authenticity and warranty\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Matching Quad (4 tubes)","offer_id":45964066586860,"sku":"APS-0975-3","price":1099.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":45964066619628,"sku":"APS-0975-2","price":493.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":45964066652396,"sku":"APS-0975-1","price":210.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-el34-reserve-vacuum-tube-42150331318508.jpg?v=1741110683"},{"product_id":"ray-tubes-300b-reserve-vacuum-tube","title":"Ray Tubes 300B RESERVE Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eThe Best of the Best\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe RESERVE Collection of Ray vacuum tubes are artfully designed and carefully manufactured solely for hifi audiophile devices. With the RESERVE, vocals are a revelation: smooth, lifelike, and beautifully present. They convey a sense of realism and immediacy without any bloat, offering a gentle yet compelling delivery with superior decay. The treble is crisp yet laid-back, carefully balanced to avoid sibilance or harshness. This balanced sound signature extends to the low-end as well: full and commanding, contributing to an overall superbly realistic imaging that is brain-scratchingly good.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEngineered Exclusively for Audiophile Systems\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplicitly engineered for audiophile applications, the RESERVE Collection of vacuum tubes are crafted through a unique process that targets the specific needs of audiophiles, focusing on critical sound characteristics such as vocal realism, texture, and extended bass. Every aspect of their design and manufacture is aimed at enhancing the listening experience in high-fidelity systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEnsuring Excellence\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEvery vacuum tube in the RESERVE Collection is subjected to a stringent quality assurance process. An audio engineer personally assesses each vacuum tube against a detailed checklist that includes sound profile, dynamics, microphonics, gain, conductance, and noise levels, along with overall performance. This ensures not only that the vacuum tubes align with audiophile expectations for sound quality but also that they meet our rigorous standards for reliability and consistency. \u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2 class=\"h2\"\u003e\u003cstrong\u003eMagic Coating\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSome things are better left unseen. You can’t see inside the RESERVE tube because it’s coated with something called monocrystalline carbon. This layer allows for quicker electron transmission, keeps the glass cool, and blocks out noise. If you’ve got an engineering background, you might find the science fascinating. For the rest of us, it’s basically magic. The coating is delicate and tough to apply, which complicates production. That’s why Ray only uses it for their RESERVE tubes—and why it costs more. When all’s said and done, it just means one thing—the sound is amazing.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eRay Tubes Quality Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFrom extensive burn-in to expert listening sessions, Ray Tubes goes above and beyond to guarantee each tube they sell is ready for your high-end system. \u003ca href=\"https:\/\/raytubes.audio\/blogs\/news\/ray-tubes-1-year-warranty-quality-control\" rel=\"noopener\" target=\"_blank\"\u003eRead more about the process on their blog.\u003c\/a\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMagic Coating: Monocrystalline carbon coating enhances sound by\u003cbr\u003ecooling, blocking noise, and allowing for quicker electron transmission\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched quad (4 tubes) or pair (2 tubes) or single tube (1 tube)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTube type: 300B\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSocket: 4-pin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOutput Power\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePower Output (Pout): 6.6 W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFilament Specification\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFilament Voltage (Uf): 5 V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFilament Current (If): 1.2 A\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaximum Rating\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eAnode Voltage (Ua): 480 V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAnode Dissipation Power (Pa): 40 W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCathode Current (Ik):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSelf Bias: 100 mA | Fixed Bias: 70 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInterelectrode Capacitance\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eInput Capacitance (Cin): 9 pF\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOutput Capacitance: 4.3 pF\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTransfer Capacitance: 15 pF\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStatic Parameters\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eAnode Voltage (Ua): 300 V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGrid Voltage (Ug): -60 V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAnode Current (Ia): 60 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTransconductance (Gm): 5.5 mA\/V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInternal Resistance (Ri): 0.7 kΩ\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAmplification Factor (μ): 3.85\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWhat's included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRay Tubes 300B RESERVE Vacuum Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUser handbook featuring burn-in guidelines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCertificate of authenticity and warranty\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHelp Shape Our Vacuum Tube Legacy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWith the launch of our Ray Vacuum Tubes, we embark on an exciting mission to create a comprehensive lineup of tubes that cater to the discerning audiophile. We view this as a collaborative journey with the audiophile community and value your feedback and support to shape our future tube lineup. \u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-feedback-blog\" target=\"_blank\"\u003eLet us know what other tubes you'd like us to create.\u003c\/a\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Ray Tubes","offers":[{"title":"Matching Quad (4 tubes)","offer_id":46020220354796,"sku":"APS-0979-3","price":2199.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":46020220387564,"sku":"APS-0979-2","price":999.0,"currency_code":"USD","in_stock":true},{"title":"Single (1 tube)","offer_id":46020220420332,"sku":"APS-0979-1","price":482.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-300b-reserve-vacuum-tube-42234815414508.jpg?v=1741110671"},{"product_id":"ray-tubes-12at7-core-vacuum-tube","title":"Ray Tubes 12AT7 CORE Vacuum Tube","description":"\u003cp\u003e\u003cem\u003eNote: This tube model is out of stock until September 26th.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch1\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\n\u003c\/h1\u003e\n\u003ch1\u003e\u003cb\u003eIntroducing 12AT7\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003eThe 12AT7 is part of a large family of dual triodes that also includes the common 12AX7 and 12AU7 tubes. Its higher gain and transconductance made it suitable for high frequency applications in devices like TVs and FM radios. In the world of audio, itʼs commonly used as a driver or phase inverter in push-pull audio circuits. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBeyond the Ordinary\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eRay Tubes’ CORE Collection of vacuum tubes offers the quintessential upgrade for audiophiles ready to move beyond the limitations of standard factory vacuum tubes. Each vacuum tube is hand-selected, with a strict process that allows only the top percentile of a production batch—those that meet and surpass their rigorous standards for gain, conductance, noise, and microphonics—into your audio system.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eChoosing Certainty: Why New Stock is Better\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eWhen you buy our CORE Collection of vacuum tubes, you’re guaranteeing that your listening is enhanced by the best of today’s technology. In contrast, when you buy New Old Stock (NOS) vacuum tubes, you’re venturing into unknown territory. While NOS vacuum tubes carry undeniable vintage charm, they often come with hidden risks. Over time, even unused vacuum tubes (hence the “new” in “new old stock”) can degrade, leading to reliability issues and unpredictable performance. You might face diminished sound quality or even failure, as age affects the components, making them more susceptible to wear and damage. In contrast, Ray’s newly manufactured vacuum tubes carry the latest technological advances and stringent quality controls.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eCurated by Audio Engineers\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe secret behind Ray Tubes’ exceptional sound quality lies in the hands of their dedicated audio engineers. Unlike the impersonal selection process for NOS vacuum tubes, which can be hit or miss in terms of quality, their engineers are deeply involved in every step of choosing their vacuum tubes. They don't just look at specs or conduct standard tests; they listen, evaluate, and hand-select each vacuum tube. This human touch ensures that every vacuum tube Ray produces not only aims to match the vintage experience but significantly surpasses it in reliability and performance.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected. \u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics \u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: 12AT7 \/ ECC81 \/ 6201 \/ CV4024\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Tubes OR Single Ray Tube\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46574865809644,"sku":"APS-1046-1","price":44.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 tubes)","offer_id":46574865776876,"sku":"APS-1046-2","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-12at7-core-vacuum-tube-1175039962.jpg?v=1750860363"},{"product_id":"ray-tubes-el84-core-vacuum-tube","title":"Ray Tubes EL84 CORE Vacuum Tube","description":"\u003ch1\u003e\u003cb\u003eIntroducing EL84\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003eThe EL84 is a power pentode vacuum tube introduced in 1953. Its original purpose was to eliminate the need for a separate driver tube in cheap radio equipment, but it quickly found a place in music history as a component in guitar amps like the legendary Vox AC30, favored by The Beatles, The Rolling Stones, Queen, and countless other bands.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBeyond the Ordinary\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eRay Tubes’ CORE Collection of vacuum tubes offers the quintessential upgrade for audiophiles ready to move beyond the limitations of standard factory vacuum tubes. Each vacuum tube is hand-selected, with a strict process that allows only the top percentile of a production batch—those that meet and surpass their rigorous standards for gain, conductance, noise, and microphonics—into your audio system.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eChoosing Certainty: Why New Stock is Better\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eWhen you buy our CORE Collection of vacuum tubes, you’re guaranteeing that your listening is enhanced by the best of today’s technology. In contrast, when you buy New Old Stock (NOS) vacuum tubes, you’re venturing into unknown territory. While NOS vacuum tubes carry undeniable vintage charm, they often come with hidden risks. Over time, even unused vacuum tubes (hence the “new” in “new old stock”) can degrade, leading to reliability issues and unpredictable performance. You might face diminished sound quality or even failure, as age affects the components, making them more susceptible to wear and damage. In contrast, Ray’s newly manufactured vacuum tubes carry the latest technological advances and stringent quality controls.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eCurated by Audio Engineers\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe secret behind Ray Tubes’ exceptional sound quality lies in the hands of their dedicated audio engineers. Unlike the impersonal selection process for NOS vacuum tubes, which can be hit or miss in terms of quality, their engineers are deeply involved in every step of choosing their vacuum tubes. They don't just look at specs or conduct standard tests; they listen, evaluate, and hand-select each vacuum tube. This human touch ensures that every vacuum tube Ray produces not only aims to match the vintage experience but significantly surpasses it in reliability and performance.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGold Pins: Excellence in Every Detail\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch—they're built to last.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSilk-Screen Printed Logos\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSuperior Sound, Secured\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected. \u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eProduct highlights\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eHand-selected and tested\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003eLow noise and microphonics \u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eMatched pair (2 tubes) or single tube (1 tube)\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eOnly 4% of the tubes commissioned for production meet our standards for gain and conductance matching\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eApos 12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eTube type: EL84 \/ 6BQ5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Amps\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\" target=\"_blank\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003ePair of matched Ray Tubes OR Single Ray Tube OR Quad of matched Ray Tubes\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: 400;\"\u003e\u003cspan style=\"font-weight: 400;\"\u003eManual booklet\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46574932394220,"sku":"APS-1047-1","price":44.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 tubes)","offer_id":46574932361452,"sku":"APS-1047-2","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 tubes)","offer_id":46575014609132,"sku":"APS-1047-3","price":224.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-el84-core-vacuum-tube-1183570859.jpg?v=1754590843"},{"product_id":"ray-tubes-el84-select-vacuum-tube","title":"Ray Tubes EL84 SELECT Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eMeet the EL84\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe EL84 is a power pentode vacuum tube introduced in 1953. Its original purpose was to eliminate the need for a separate driver tube in cheap radio equipment, but it quickly found a place in music history as a component in guitar amps like the legendary Vox AC30, favored by The Beatles, The Rolling Stones, Queen, and countless other bands.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection \u003c\/a\u003ebut makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDespite originating from the same batches as Ray Tubes' CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eTube type: EL84 \/ 6BQ5\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSocket: 9-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eCompatible Amps\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSingle Ray Tubes EL84 SELECT OR Matched Pair of Ray Tubes EL84 SELECT OR Matched Quad of Ray Tubes EL84 SELECT\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46575174353132,"sku":"APS-1048-1","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":46575174320364,"sku":"APS-1048-2","price":224.0,"currency_code":"USD","in_stock":true},{"title":"Matching Quad (4 tubes)","offer_id":46575174287596,"sku":"APS-1048-3","price":479.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-el84-select-vacuum-tube-1183570869.jpg?v=1754590971"},{"product_id":"ray-tubes-select-300b-vacuum-tube","title":"Ray Tubes SELECT 300B Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eMeet the 300B\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eIntroduced in 1938, the 300B powered the cinemas of Hollywoodʼs Golden Age. Audiophiles have treasured it for decades for its low noise and good reliability. Ray Tubes is proud to introduce their take on a classic.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection \u003c\/a\u003ebut makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDespite originating from the same batches as Ray Tubes' CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGOLD PINS: EXCELLENCE IN EVERY DETAIL\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch they're built to last.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eTube type: 300B\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSocket: 4-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eCompatible Amps\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSingle Ray Tubes SELECT 300B OR Matched Pair of Ray Tubes SELECT 300B OR Matched Quad of Ray Tubes SELECT 300B\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46727372439788,"sku":"APS-1109-1","price":239.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":46727372472556,"sku":"APS-1109-2","price":529.0,"currency_code":"USD","in_stock":true},{"title":"Matching Quad (4 tubes)","offer_id":46727372505324,"sku":"APS-1109-3","price":1099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-select-300b-vacuum-tube-1184013545.jpg?v=1754944014"},{"product_id":"ray-tubes-select-2a3-vacuum-tube","title":"Ray Tubes SELECT 2A3 Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eMeet the 2A3\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe 2A3 was introduced by RCA in the 1930s for use in large radios, public address systems, and early hi-fi setups. Despite its notoriously complex filament, the 2A3 saw widespread use in military applications and in the post-war high-fi boom. It was also a favourite of Paul Klipsch, who in 1946 invented his namesake Klipschorn loudspeaker.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection \u003c\/a\u003ebut makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDespite originating from the same batches as Ray Tubes' CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGOLD PINS: EXCELLENCE IN EVERY DETAIL\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch they're built to last.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eTube type: 2A3\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSocket: 4-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eCompatible Amps\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eSingle Ray Tubes SELECT 2A3 OR Matched Pair of Ray Tubes SELECT 2A3 OR Matched Quad of Ray Tubes SELECT 2A3\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46727389577452,"sku":"APS-1110-1","price":185.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":46727389610220,"sku":"APS-1110-2","price":399.0,"currency_code":"USD","in_stock":true},{"title":"Matching Quad (4 tubes)","offer_id":46727389642988,"sku":"APS-1110-3","price":839.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-select-2a3-vacuum-tube-1184013538.jpg?v=1754943896"},{"product_id":"ray-tubes-select-6sl7-vacuum-tube","title":"Ray Tubes SELECT 6SL7 Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection \u003c\/a\u003ebut makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDespite originating from the same batches as Ray Tubes' CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eGOLD PINS: EXCELLENCE IN EVERY DETAIL\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eGold pins not only add a touch of elegance but also serve a significant purpose. Gold's superior conductivity enhances signal transmission for crystal-clear sound, while its resistance to oxidation ensures long-term performance and durability. These qualities, combined with the secure contact gold provides within the socket, mean your vacuum tubes aren't just top-notch they're built to last.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eGold pins for corrosion resistance and excellent conduction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eTube type: 6SL7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSocket: 8-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eCompatible Amps\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSingle Ray Tubes SELECT 6SL7 OR Matched Pair of Ray Tubes SELECT 6SL7 OR Matched Quad of Ray Tubes SELECT 6SL7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\n\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46727392198892,"sku":"APS-1111-1","price":99.0,"currency_code":"USD","in_stock":true},{"title":"Matching Pair (2 tubes)","offer_id":46727392231660,"sku":"APS-1111-2","price":224.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-select-6sl7-vacuum-tube-1184013531.jpg?v=1754943775"},{"product_id":"ray-tubes-select-5u4-vacuum-tube","title":"Ray Tubes SELECT 5U4 Vacuum Tube","description":"\u003ch1\u003e\u003cstrong\u003eMeet the 5U4\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe 5U4 is a common full-wave rectifier tube used in power supplies to convert alternating current to direct current. Its twin-diode design uses a shared cathode and two anodes to convert both halves of the AC cycle. Rectifiers like the 5U4 are sometimes overlooked by audiophiles, but like power and signal tubes, they can greatly influence the sound of a tube amplifier.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA New Dimension of Sound\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe SELECT Collection not only maintains the exceptional manufacturing quality of the \u003ca href=\"https:\/\/raytubes.audio\/collections\/core\"\u003eCORE Collection \u003c\/a\u003ebut makes a significant leap in sound quality. Engineered for audiophiles who want an immersive auditory experience, this tier far surpasses what “factory vacuum tubes” can offer.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eMake Your Good Amp Great\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe SELECT Collection significantly upgrades the performance of your vacuum tube amplifier, even starter models. These vacuum tubes are engineered to enhance the hidden capabilities of your amp, transforming its output into something far beyond its original sound profile. With each vacuum tube rigorously selected by our audio engineers, the SELECT Collection ensures a profound enhancement in clarity, texture, and detail. Every note resonates with more realism, every harmony carries more emotionality, and every rhythm pulses with tighter low-end precision.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eThe SELECT Vacuum Tube Difference\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDespite originating from the same batches as Ray Tubes' CORE Collection, SELECT vacuum tubes are distinguished not by automated manufacturing differences but by the expert judgment of a professional. Their engineers assess each vacuum tube individually for its sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This human touch ensures that only vacuum tubes that meet a superior level of sonic excellence are chosen. This meticulous, engineer-led selection is what makes the SELECT Collection exceptionally reliable and capable of delivering next-level sound quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSilk-Screen Printed Logos\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eEven the logos deserve a special mention. Silk-screen-printed onto the tubes, they demonstrate Ray Tubes’ commitment to superior craftsmanship down to the smallest detail. This time-honored printing technique yields results that are not only aesthetically pleasing but also durable, ensuring the design work remains vibrant and intact over time.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Sound, Secured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAn exceptional 12-month warranty—a rarity in the world of vacuum tubes, especially NOS vacuum tubes—reflects Ray Tubes’ confidence in their vacuum tubes’ performance and durability. This warranty is your safeguard against any manufacturing defects, making sure that your investment is protected.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eHand-selected and tested\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eA substantial upgrade from standard NOS tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eLow noise and microphonics\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eFewer than 5% of the tubes commissioned for production meet our voltage, current, and sound signature standards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003e12-month warranty against manufacturing defects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eTube type: 5U4\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSocket: 4-pin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eCompatible Amps\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003ca href=\"https:\/\/raytubes.audio\/pages\/tube-compatibility-list\"\u003e\u003cspan\u003eExplore Ray Tubes' Tube Amp Compatibility List\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSingle Ray Tubes SELECT 5U4 OR Matched Pair of Ray Tubes SELECT 5U4 OR Matched Quad of Ray Tubes SELECT 5U4\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" aria-level=\"1\"\u003e\n\u003cp dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eManual booklet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eExplore More\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/apos-ray-compatible-amps\" rel=\"noopener\" target=\"_blank\"\u003eWhat Tube Amps Are Compatible with Ray Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/howto-maintain-vacuum-tubes\" rel=\"noopener\" target=\"_blank\"\u003eHow Do You Maintain Your Vacuum Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/tube-rolling-guide\" rel=\"noopener\" target=\"_blank\"\u003eHow Do I Roll the Tubes of My Tube Amp?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/why-upgrade-your-tubes\" rel=\"noopener\" target=\"_blank\"\u003eWhy Upgrade Your Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/apos.audio\/blogs\/audiophile-knowledge-base\/what-are-matched-tubes\" target=\"_blank\"\u003eWhat Are Matched Tubes?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apos.audio\/blogs\/news\/apos-ray-faq\" target=\"_blank\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Ray Tubes","offers":[{"title":"Single (1 tube)","offer_id":46727398031596,"sku":"APS-1112-1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-ray-tubes-vacuum-tube-ray-tubes-select-5u4-vacuum-tube-single-1-tube-1184013524.jpg?v=1754943660"},{"product_id":"brimar-cv4003-vacuum-tube","title":"Brimar CV4003 (12AU7) 1960's Military Grade NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe CV4003 Brimar is a precision dual triode tube, widely used in high-fidelity audio equipment and professional radio applications. Its grey plate construction and ring getter ensure stable operation, low noise, and excellent linearity. Fully tested on Amplitrex AT1000 to guarantee reliability, these tubes come in original Brimar boxes and are ideal for collectors and audiophiles seeking top-quality performance.\u003c\/span\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Brimar 12AU7 \/ ECC82 \/ CV4003 \/ 12AU7A \/ 12AU7WA \/ ECC802, \/ ECC802S \/ E82CC \/ ECC186 \/ 5814 \/ 5814A \/ 6189 \/ 6067 \/ CV491 \/ M8136 \/ B329 \/ 13D5 \/ A2293\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Gray Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eEngland\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBox Type: \u003c\/b\u003eNOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47015758201068,"sku":"APS-1260-4","price":460.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47015758266604,"sku":"APS-1260-5","price":418.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47015758332140,"sku":"APS-1260-6","price":390.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47015758233836,"sku":"APS-1260-7","price":880.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47015758299372,"sku":"APS-1260-8","price":836.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47015758364908,"sku":"APS-1260-9","price":780.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":46984857288940,"sku":"APS-1260-1","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":46984857321708,"sku":"APS-1260-2","price":199.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47011543679212,"sku":"APS-1260-3","price":185.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-brimar-cv4003-12au7-1960-s-military-grade-vacuum-tube-1218427192.jpg?v=1771375567"},{"product_id":"siemens-e82cc-vacuum-tube","title":"Siemens E82CC (12AU7) NOS Vacuum Tube","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eThe Siemens E82CC (early triple-mica Siemens \u0026amp; Halske) is one of the most respected premium-grade 12AU7 family tubes. Known for its clarity, precision, low microphonics, and high reliability, it is a top choice for high-end preamps and phono stages.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Siemens E82CC \/ 12AU7 \/ \u003cmeta charset=\"UTF-8\"\u003eECC82 \/ 12AU7A \/ 12AU7WA \/ ECC802 \/ ECC802S \/ E82CC \/ ECC186 \/ 5814 \/ 5814A \/ 6189 \/ 6067 \/ CV4003\/ CV491 \/ M8136\/ B329 \/ 13D5 \/ A2293\u003cbr\u003e\u003cstrong\u003eGetter type:\u003c\/strong\u003e Halo \/ Top Ring getter\u003cbr\u003e\u003cstrong\u003ePlate type:\u003c\/strong\u003e Gray plate\u003cbr\u003e\u003cstrong\u003eVersion:\u003c\/strong\u003e True early triple-mica version\u003cbr\u003e\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 advanced digital tube tester\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 months against manufacturing defects\u003c\/p\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142248284396,"sku":"APS-1259-4","price":650.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142248317164,"sku":"APS-1259-5","price":586.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142248349932,"sku":"APS-1259-6","price":545.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142248382700,"sku":"APS-1259-7","price":1300.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142248415468,"sku":"APS-1259-8","price":1174.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142248448236,"sku":"APS-1259-9","price":1090.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142248186092,"sku":"APS-1259-1","price":315.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142248218860,"sku":"APS-1259-2","price":283.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142248251628,"sku":"APS-1259-3","price":262.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-siemens-e82cc-12au7-vacuum-tube-1220503291.jpg?v=1771370168"},{"product_id":"mullard-ecc82-vacuum-tube","title":"Mullard ECC82 (12AU7) NOS Vacuum Tube","description":"\u003cp dir=\"ltr\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe Mullard ECC82, known in the U.S. as the 12AU7, is a classic British small-signal dual triode known for its smooth, composed sonic character and long-term reliability. Produced across Mullard’s UK and European factories, these tubes became a staple in hi-fi amplifiers, preamps, and studio equipment where stability and musical balance mattered more than sheer gain. Sonically, the ECC82 is appreciated for its warm, natural midrange and controlled presentation, making it well suited for line stages, driver positions, and circuits that benefit from low noise and good linearity.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Mullard ECC82 \/ 12AU7 \/ 12AU7 \/ 12AU7A \/ 12AU7WA \/ ECC802 \/ ECC802S \/ E82CC \/ ECC186 \/ 5814 \/ 5814A \/ 6189 \/ 6067 \/ CV4003 \/ CV491 \/ M8136 \/ B329 \/ 13D5 \/ A2293\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Grey Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eEngland\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142248579308,"sku":"APS-1258-4","price":440.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142248612076,"sku":"APS-1258-5","price":398.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142248644844,"sku":"APS-1258-6","price":370.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142248677612,"sku":"APS-1258-7","price":840.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142248710380,"sku":"APS-1258-8","price":756.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142248743148,"sku":"APS-1258-9","price":740.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142248481004,"sku":"APS-1258-1","price":210.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142248513772,"sku":"APS-1258-2","price":189.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142248546540,"sku":"APS-1258-3","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-mullard-ecc82-12au7-vacuum-tube-1218427164.jpg?v=1771375147"},{"product_id":"siemens-e88cc-vacuum-tube","title":"Siemens E88CC (6922) NOS Vacuum Tube","description":"\u003cp\u003eThe Siemens E88CC \/ 6922 is a premium high-spec double triode known for exceptional reliability, low noise, and outstanding linearity. These German-made versions feature gold pins, grey plates, and a top ring getter, making them highly desirable for high-end audio, preamps, DACs, and precision instrumentation. Their robust design ensures stable performance and long service life.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Siemens E88CC \/ 6922 \/ \u003cmeta charset=\"UTF-8\"\u003eECC88 \/ 6DJ8 \/ 6922 \/ 7308 \/ E188CC \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Gray Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Type:\u003c\/strong\u003e Gold Pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eGermany\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142248906988,"sku":"APS-1257-4","price":520.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142248939756,"sku":"APS-1257-5","price":452.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142248972524,"sku":"APS-1257-6","price":420.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142249005292,"sku":"APS-1257-7","price":960.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142249038060,"sku":"APS-1257-8","price":904.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142249070828,"sku":"APS-1257-9","price":840.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142248808684,"sku":"APS-1257-1","price":240.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142248841452,"sku":"APS-1257-2","price":216.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142248874220,"sku":"APS-1257-3","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-siemens-e88cc-6922-vacuum-tube-1220503298.jpg?v=1771368371"},{"product_id":"ediswan-cv5358-vacuum-tube","title":"Ediswan CV5358 (ECC88) NOS Vacuum Tube","description":"\u003cp\u003e\u003cspan\u003eThe Ediswan CV5358 is a British military-spec dual triode built for applications where stability, low noise, and long-term reliability were critical. Manufactured by Edison Swan (Ediswan) in the UK, this valve was designed to meet strict government and communications standards, resulting in tight tolerances and consistent performance. In audio power supplies, the CV5358 is valued for its calm, well-regulated behavior, helping amplifiers maintain composure under load and reducing unwanted noise in downstream circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Ediswan CV5358 \/ ECC88\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eEngland\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142249464044,"sku":"APS-1256-4","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142249496812,"sku":"APS-1256-5","price":209.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142249529580,"sku":"APS-1256-6","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142249562348,"sku":"APS-1256-7","price":460.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142249595116,"sku":"APS-1256-8","price":418.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142249627884,"sku":"APS-1256-9","price":390.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142249365740,"sku":"APS-1256-1","price":105.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142249398508,"sku":"APS-1256-2","price":94.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142249431276,"sku":"APS-1256-3","price":87.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-ediswan-cv5358-ecc88-vacuum-tube-1218427179.jpg?v=1771374668"},{"product_id":"brimar-6060-vacuum-tube","title":"Brimar 6060 (12AT7) NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe Brimar 6060 is a British-made dual triode tube from the classic era of Brimar production (primarily 1950s-1960s, made in Footscray, Kent, UK). The 6060 is closely related to the 12AT7, sharing a reputation for stable output, good linearity, and long service life. It's the Brimar version of a high-reliability double triode, comparable to the Mullard M8162 or the Telefunken ECC801S \/ GEC A2900. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Brimar 6060 \/ 12AT7 \/ ECC81 \/ E81CC \/ 6201 \/ M8162 \/ CV4024 \/ CV455 \/ A2900 \/ 12AT7A \/ 12AT7WA \/ 12AT7WB \/ 12ATWC \/ ECC801 \/ ECC801S\u003cmeta charset=\"UTF-8\"\u003e \u003cstrong data-start=\"633\" data-end=\"643\"\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eEngland\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBox Type: \u003c\/b\u003eNOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142249857260,"sku":"APS-1255-4","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142249890028,"sku":"APS-1255-5","price":202.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142249922796,"sku":"APS-1255-6","price":190.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142249955564,"sku":"APS-1255-7","price":440.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142249988332,"sku":"APS-1255-8","price":404.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142250021100,"sku":"APS-1255-9","price":380.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142249758956,"sku":"APS-1255-1","price":100.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142249791724,"sku":"APS-1255-2","price":91.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142249824492,"sku":"APS-1255-3","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-brimar-6060-12at7-vacuum-tube-1218427208.jpg?v=1771374127"},{"product_id":"rca-6as7g-vacuum-tube","title":"RCA 6AS7G (6080) NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003eThe RCA 6AS7G is a high-quality dual triode power tube widely used in audio amplifiers, OTL headphone amps, and power regulators. Boasting a warm tone, reliability, and smooth output characteristics, the 6AS7G delivers excellent balance and linearity, making it a favorite among audiophiles.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e RCA 6AS7G \/ 6080 \/ 6AS7G \/ 5998 \/ 6080 \/ 6336 \/ 6528 \/ 6AS7GA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type: \u003c\/strong\u003eNOS in original box\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eUSA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142250152172,"sku":"APS-1254-4","price":460.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142250184940,"sku":"APS-1254-5","price":418.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142250217708,"sku":"APS-1254-6","price":390.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142250250476,"sku":"APS-1254-7","price":880.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142250283244,"sku":"APS-1254-8","price":836.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142250316012,"sku":"APS-1254-9","price":780.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142250053868,"sku":"APS-1254-1","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142250086636,"sku":"APS-1254-2","price":199.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142250119404,"sku":"APS-1254-3","price":185.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-rca-6as7g-6080-vacuum-tube-1218497197.jpg?v=1771371188"},{"product_id":"rca-807-vacuum-tube","title":"RCA 807 NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003eThe RCA 807 (VT100) is a classic beam power tube widely used in vintage transmitters, hi-fi amplifiers, and professional audio equipment. Featuring a bottom dual “D” getter with 3 rivets and robust construction, it provides stable performance, reliable output, and excellent linearity.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e RCA 807 \/ VT100 \/ VT60 \/ 1625 \/ ATS25 \/ 6L6G\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter type:\u003c\/strong\u003e Bottom dual “D” getter, 3 rivet\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase type:\u003c\/strong\u003e Brown base\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e USA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 advanced digital tube tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142250447084,"sku":"APS-1253-4","price":142.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142250479852,"sku":"APS-1253-5","price":131.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142250512620,"sku":"APS-1253-6","price":125.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142250545388,"sku":"APS-1253-7","price":284.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142250578156,"sku":"APS-1253-8","price":263.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142250610924,"sku":"APS-1253-9","price":250.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142250348780,"sku":"APS-1253-1","price":61.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142250381548,"sku":"APS-1253-2","price":55.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142250414316,"sku":"APS-1253-3","price":52.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-rca-807-vacuum-tube-1220503307.jpg?v=1771377996"},{"product_id":"gec-cv6-vacuum-tube","title":"GEC CV6 (2C22\/ 6C8C) NOS Vacuum Tube","description":"\u003cp\u003eThe CV6 GEC is a 1930s vintage military grade 2C22\/ VR135 \/ DET20, which is equivalent to 6J5 and half of 6SN7. When two tubes are used with a converter adapter, they work as a single 6SN7. The VR135 is a military receiving valve that became reclassified as the CV6 when the common valve listings were drawn-up to remove the problems of a lack of interchange between the UK Armed Forces.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCV6 to 6SN7 Adapter Add-on\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eHigh-quality adapter allowing 2C22 \/ 7193 \/ CV6 tubes to be used in equipment designed for 6SN7 tube sockets. Clean, reliable conversion — ideal for audio work, testing, and repairs.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReliable pin-to-pin conversion with gold-plated contacts for improved conductivity and reduced oxidation. Designed to maintain proper alignment and stable contact in tube sockets. Suitable for audio enthusiasts and technicians who need a simple, reversible conversion solution.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eTube\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e GEC CV6 \/ \u003cmeta charset=\"UTF-8\"\u003e 6J5 \/ 6J5G \/ 6J5GT \/ VT-94 \/ CV1067 \/ CV1135 \/ L63 \/ 7193 \/ CV1671 \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type:\u003c\/strong\u003e Black Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Pan Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade\u003c\/strong\u003e: Military Grade\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eEngland\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdapter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConverts\u003c\/strong\u003e: 2C22 \/ 7193 \/ CV6 → 6SN7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Ceramic base with gold-plated pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation\u003c\/strong\u003e: Plug-and-play, no soldering required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse\u003c\/strong\u003e: Amplifiers, preamps, test rigs, DIY projects\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eAdapter\u003c\/strong\u003e \u003cstrong\u003etype\u003c\/strong\u003e: 2C22 \/ 7193 \/ CV6 → 6SN7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e: Ceramic base, gold-plated pins\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e: Plug-in (no soldering)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Audio tube sockets using 6SN7 footprint\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003eNew\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes + CV6 To 6SN7 Adapter) \/ Archive Vault","offer_id":47142259294444,"sku":"APS-1252-4","price":400.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes + CV6 To 6SN7 Adapter) \/ Gold","offer_id":47142259327212,"sku":"APS-1252-5","price":350.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes + CV6 To 6SN7 Adapter) \/ Silver","offer_id":47142259359980,"sku":"APS-1252-6","price":330.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes + 2 CV6 To 6SN7 Adapters) \/ Archive Vault","offer_id":47142259392748,"sku":"APS-1252-7","price":800.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes + 2 CV6 To 6SN7 Adapters) \/ Gold","offer_id":47142259425516,"sku":"APS-1252-8","price":700.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes + 2 CV6 To 6SN7 Adapters) \/ Silver","offer_id":47142259458284,"sku":"APS-1252-9","price":660.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142259196140,"sku":"APS-1252-1","price":150.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142259228908,"sku":"APS-1252-2","price":135.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142259261676,"sku":"APS-1252-3","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-gec-cv6-2c22-6c8c-vacuum-tube-1218427170.jpg?v=1771373587"},{"product_id":"nec-6x4-vacuum-tube","title":"NEC 6X4 (6202) NOS Vacuum Tube","description":"\u003carticle data-turn=\"user\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-13\" data-turn-id=\"d3c11544-6cec-4828-a8a4-4c6aaea817df\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-(--header-height)\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pt-12 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" data-message-id=\"d3c11544-6cec-4828-a8a4-4c6aaea817df\" data-message-author-role=\"user\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003carticle data-turn=\"assistant\" data-scroll-anchor=\"true\" data-testid=\"conversation-turn-14\" data-turn-id=\"request-WEB:c215f913-6c15-4525-a7a9-ad15748d6347-9\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-model-slug=\"gpt-5-2\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" data-message-id=\"ff9661fd-2ce1-4ecd-b193-92f534afa724\" data-message-author-role=\"assistant\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"767\" data-start=\"0\"\u003eThe NEC 6X4 is a compact full-wave rectifier that boasts reliability, low noise, and steady voltage delivery in small-signal and low-power audio circuits. Manufactured in Japan to tight industrial standards, NEC versions are well regarded for their calm, controlled presentation by keeping the power supply quiet and well regulated, which helps downstream stages perform at their best. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e NEC 6X4 \/ EZ90 \/ U78 \/ CV493 \/ CV4005 \/ 6202\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Gray Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox\u003c\/strong\u003e: Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eJapan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47142261063916,"sku":"APS-1251-4","price":100.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47142261096684,"sku":"APS-1251-5","price":94.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47142261129452,"sku":"APS-1251-6","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47142261162220,"sku":"APS-1251-7","price":200.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47142261194988,"sku":"APS-1251-8","price":188.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47142261227756,"sku":"APS-1251-9","price":180.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47142260965612,"sku":"APS-1251-1","price":40.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47142260998380,"sku":"APS-1251-2","price":37.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47142261031148,"sku":"APS-1251-3","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-nec-6x4-6202-vacuum-tube-1218427148.jpg?v=1771373168"},{"product_id":"philips-el84-vacuum-tube","title":"Philips EL84 NOS Vacuum Tube","description":"\u003cp dir=\"ltr\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003ePhilips EL84 tubes are a cornerstone of classic European tube design: compact, efficient power pentodes that helped define the sound of countless hi-fi and guitar amplifiers from the 1950s onward. Produced across Philips’ network of European factories, these boast consistency, long service life, and a tonal balance that pairs lively dynamics with a smooth, harmonically rich midrange. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. 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As part of the long-running 6L6 family, the type reflects the Soviet Union’s adaptation of a proven Western beam tetrode design that became a standard output tube in both Hi-Fi and instrument amplifiers. These examples feature the desirable Bottom Inverted Cup Getter and Long Grey Plate construction, a rugged internal design with stable operation, efficient heat dissipation, and long service life.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e 6L6GC \/ 6N3C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Bottom Inverted Cup Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Long Grey Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type:\u003c\/strong\u003e Black Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e USSR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in New White Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47746718662892,"sku":"APS-1357-1","price":250.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47746718695660,"sku":"APS-1357-2","price":229.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47746718728428,"sku":"APS-1357-3","price":215.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47746718761196,"sku":"APS-1357-4","price":500.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47746718793964,"sku":"APS-1357-5","price":458.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47746718826732,"sku":"APS-1357-6","price":430.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47746718859500,"sku":"APS-1357-7","price":115.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47746718892268,"sku":"APS-1357-8","price":104.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47746718925036,"sku":"APS-1357-9","price":97.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-archive-tubes-6l6gc-6n3c-vacuum-tube-1248568422.jpg?v=1783782969"},{"product_id":"archive-tubes-rca-6f8g-vacuum-tube","title":"RCA 6F8G NOS Vacuum Tube","description":"\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"request-WEB:aa5978b9-3b86-4678-a02b-8fc60ab44037-2\" class=\"\"\u003e\n\u003csection data-turn=\"assistant\" data-testid=\"conversation-turn-2\" data-turn-id-container=\"request-WEB:aa5978b9-3b86-4678-a02b-8fc60ab44037-2\" data-turn-id=\"request-WEB:aa5978b9-3b86-4678-a02b-8fc60ab44037-2\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-5\" dir=\"auto\" data-message-id=\"61d862b8-5844-4808-baff-ca3d2fe632ea\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"768\" data-start=\"0\"\u003eThe RCA 6F8G is a New Old Stock American-made twin triode vacuum tube produced for use in early radio, communications, and audio equipment. Introduced during the formative years of octal tube development, the 6F8G reflects RCA’s efforts to provide compact, high-gain dual-triode performance for low-level amplification and signal-processing applications. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e RCA 6F8G\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlass Type: \u003c\/b\u003eBlack Coated \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type:\u003c\/strong\u003e Black Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMica Type:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in New White Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47753118580972,"sku":"APS-1362-1","price":536.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47753118613740,"sku":"APS-1362-2","price":484.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47753118646508,"sku":"APS-1362-3","price":450.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47753118679276,"sku":"APS-1362-4","price":1072.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47753118712044,"sku":"APS-1362-5","price":968.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47753118744812,"sku":"APS-1362-6","price":900.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47753118777580,"sku":"APS-1362-7","price":258.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47753118810348,"sku":"APS-1362-8","price":232.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47753118843116,"sku":"APS-1362-9","price":215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-rca-6f8g-vacuum-tube-1253723712.jpg?v=1786374374"},{"product_id":"sylvania-5r4gyb-vacuum-tube","title":"Sylvania 5R4GYB NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe Sylvania 5R4GYA is a full-wave rectifier tube manufactured in the United States for high-voltage power-supply service in electronic and industrial equipment. Developed as part of the rugged 5R4 rectifier family, the GYA variant reflects Sylvania's emphasis on durable construction for demanding power applications. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Sylvania 5R4GYA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47945005433068,"sku":"APS-1431-1","price":190.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47945005465836,"sku":"APS-1431-2","price":175.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47945005498604,"sku":"APS-1431-3","price":165.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47945005531372,"sku":"APS-1431-4","price":380.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47945005564140,"sku":"APS-1431-5","price":350.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47945005596908,"sku":"APS-1431-6","price":330.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47945005629676,"sku":"APS-1431-7","price":85.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47945005662444,"sku":"APS-1431-8","price":77.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47945005695212,"sku":"APS-1431-9","price":72.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/SYLVANIA5R4GYB_1.jpg?v=1784047288"},{"product_id":"western-electric-vt-25-vacuum-tube","title":"Western Electric VT-25 NOS Vacuum Tube","description":"\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eThe Western Electric VT-25 is a directly heated power triode manufactured in the United States for military radio and communications equipment, particularly aircraft transmitters of the World War II era. Closely related to the VT-25A and Type 10 family, it reflects Western Electric’s specialized production of rugged transmitting and audio-frequency tubes for professional service. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Western Electric VT-25 \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type: \u003c\/strong\u003eBlack Plate\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type:\u003c\/strong\u003e Ceramic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Leaf Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47945018343660,"sku":"APS-1397-1","price":1117.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47945018376428,"sku":"APS-1397-2","price":1009.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47945018409196,"sku":"APS-1397-3","price":937.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47945018441964,"sku":"APS-1397-4","price":2234.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47945018474732,"sku":"APS-1397-5","price":2018.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47945018507500,"sku":"APS-1397-6","price":1875.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47945018540268,"sku":"APS-1397-7","price":548.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47945018573036,"sku":"APS-1397-8","price":494.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47945018605804,"sku":"APS-1397-9","price":458.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/WESTERNELECTRICVT25_1.jpg?v=1784047645"},{"product_id":"siemens-12ax7-ecc83-vacuum-tube","title":"Siemens 12AX7 (ECC83) NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eSiemens ECC83 (12AX7) twin triode tubes were manufactured in West Germany by Siemens, one of Europe's leading electronic component manufacturers, during the second half of the 20th century. Produced for professional, industrial, and high-fidelity applications, Siemens ECC83 tubes earned a reputation for top-notch manufacturing quality and were widely used in broadcast, laboratory, and audio equipment. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Siemens ECC83\/ 12AX7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Gray Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in New Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eGermany\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47954213470444,"sku":"APS-1369-1","price":770.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47954213503212,"sku":"APS-1369-2","price":695.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47954213535980,"sku":"APS-1369-3","price":645.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47954213568748,"sku":"APS-1369-4","price":1540.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47954213601516,"sku":"APS-1369-5","price":1390.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47954213634284,"sku":"APS-1369-6","price":1290.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47954213667052,"sku":"APS-1369-7","price":375.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47954213699820,"sku":"APS-1369-8","price":337.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47954213732588,"sku":"APS-1369-9","price":312.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/SIEMENSECC83-4.jpg?v=1784214627"},{"product_id":"bel-gz34-vacuum-tube","title":"BEL GZ34 NOS Vacuum Tube","description":"\u003cdiv class=\"\"\u003e\n\u003csection dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp\u003e\u003cspan\u003eBEL GZ34 full-wave rectifier tubes were manufactured in India by Bharat Electronics Limited (BEL), one of the country's principal government-owned electronics manufacturers, during the latter half of the 20th century. Produced to European rectifier standards, the BEL GZ34 was developed for industrial, military, and high-fidelity applications that required reliable and well-regulated high-voltage power supplies. Each tube features the desirable top double ring getter and black base construction, with indirectly heated cathodes and dual-diode architecture characteristic of the GZ34 design. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e BEL GZ34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Double Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type: \u003c\/strong\u003eBlack Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e India\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47954216452332,"sku":"APS-1368-1","price":430.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47954216485100,"sku":"APS-1368-2","price":391.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47954216517868,"sku":"APS-1368-3","price":365.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47954216550636,"sku":"APS-1368-4","price":860.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47954216583404,"sku":"APS-1368-5","price":782.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47954216616172,"sku":"APS-1368-6","price":730.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47954216648940,"sku":"APS-1368-7","price":205.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47954216681708,"sku":"APS-1368-8","price":185.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47954216714476,"sku":"APS-1368-9","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/BELGZ34_5.jpg?v=1784214754"},{"product_id":"telefunken-ez81-6ca4-vacuum-tube","title":"Telefunken EZ81 (6CA4) NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eProduced by Telefunken in West Germany during the golden age of European vacuum tube manufacturing, the EZ81 is a full-wave rectifier developed for audio amplifiers, radio receivers, and other high-fidelity power supplies. Telefunken's EZ81 earned a reputation for exceptional manufacturing consistency, and examples with Black Plate construction and the distinctive Top Ring Getter are among the most sought-after variants from the company's Berlin and Ulm production. \u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eSpecs\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Telefunken EZ81\/ 6CA4\u003cstrong data-start=\"633\" data-end=\"643\"\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in: \u003c\/b\u003eGermany\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBox Type: \u003c\/b\u003eNOS in New Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tested\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47972798431468,"sku":"APS-1370-1","price":357.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47972798464236,"sku":"APS-1370-2","price":323.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47972798497004,"sku":"APS-1370-3","price":301.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47972798529772,"sku":"APS-1370-4","price":715.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47972798562540,"sku":"APS-1370-5","price":647.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47972798595308,"sku":"APS-1370-6","price":602.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47972798628076,"sku":"APS-1370-7","price":168.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47972798660844,"sku":"APS-1370-8","price":151.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47972798693612,"sku":"APS-1370-9","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-telefunken-ez81-6ca4-vacuum-tube-1253723587.jpg?v=1786369751"},{"product_id":"stc-cv391-5b-255m-vacuum-tube","title":"STC CV391 (5B\/255M) NOS Vacuum Tube","description":"\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"request-WEB:aa5978b9-3b86-4678-a02b-8fc60ab44037-2\" class=\"\"\u003e\n\u003csection data-turn=\"assistant\" data-testid=\"conversation-turn-2\" data-turn-id-container=\"request-WEB:aa5978b9-3b86-4678-a02b-8fc60ab44037-2\" data-turn-id=\"request-WEB:aa5978b9-3b86-4678-a02b-8fc60ab44037-2\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-5\" dir=\"auto\" data-message-id=\"61d862b8-5844-4808-baff-ca3d2fe632ea\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"request-WEB:c0812bd4-af2f-4283-93ae-e21330d72c29-4\" class=\"\"\u003e\n\u003csection data-turn=\"assistant\" data-testid=\"conversation-turn-2\" data-turn-id-container=\"request-WEB:c0812bd4-af2f-4283-93ae-e21330d72c29-4\" data-turn-id=\"request-WEB:c0812bd4-af2f-4283-93ae-e21330d72c29-4\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-5\" dir=\"auto\" data-message-id=\"239085b0-31b4-40cd-80cb-d2eec9bb8d8b\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:78739712-89cd-4b2e-9e9f-03395acb850e-6\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:78739712-89cd-4b2e-9e9f-03395acb850e-6\" data-turn-id-container=\"request-WEB:78739712-89cd-4b2e-9e9f-03395acb850e-6\" data-testid=\"conversation-turn-2\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"0d9a18a5-4374-49f6-b7ca-08e42f5593f9\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"1000\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cspan\u003eThis CV391 (5B\/255M) was manufactured in England by Standard Telephones and Cables (STC) as a transmitting and power-amplifier vacuum tube for British government and industrial applications. Electrically similar to the 807 and 6L6 families, it boasts the rugged construction standards associated with British military and communications equipment. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e STC CV391 (5B\/255M)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMilitary Grade: \u003c\/b\u003eYes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e UK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in New Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47977753542892,"sku":"APS-1388-1","price":188.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47977753575660,"sku":"APS-1388-2","price":171.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47977753608428,"sku":"APS-1388-3","price":160.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47977753641196,"sku":"APS-1388-4","price":376.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47977753673964,"sku":"APS-1388-5","price":342.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47977753706732,"sku":"APS-1388-6","price":320.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47977753739500,"sku":"APS-1388-7","price":84.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47977753772268,"sku":"APS-1388-8","price":75.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47977753805036,"sku":"APS-1388-9","price":70.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-stc-cv391-5b-255m-vacuum-tube-1253723514.jpg?v=1786362911"},{"product_id":"bel-6201-vacuum-tube","title":"BEL 6201 NOS Vacuum Tube","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBEL produced this tube in India as a high-reliability version of the ECC81\/12AT7 dual triode. Each tube features distinctive three-hole plates, a top ring getter, gold-plated pins, and original BEL-branded packaging. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e BEL 6201\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Top Ring Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlate Type\u003c\/strong\u003e: 3-Hole Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Type:\u003c\/strong\u003e Gold Pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e India\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":47992177033452,"sku":"APS-1389-1","price":256.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":47992177066220,"sku":"APS-1389-2","price":234.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":47992177098988,"sku":"APS-1389-3","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":47992177131756,"sku":"APS-1389-4","price":512.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":47992177164524,"sku":"APS-1389-5","price":468.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":47992177197292,"sku":"APS-1389-6","price":440.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":47992177230060,"sku":"APS-1389-7","price":118.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":47992177262828,"sku":"APS-1389-8","price":107.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":47992177295596,"sku":"APS-1389-9","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-archive-tubes-vacuum-tube-bel-6201-vacuum-tube-1253723507.jpg?v=1786362674"},{"product_id":"gec-vt60-vacuum-tube","title":"GEC VT60 NOS Vacuum Tube","description":"\u003cdiv class=\"\"\u003e\n\u003csection dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe GEC VT60 is a British-made, military-grade beam-power tetrode derived from the 807 and produced with a premium white ceramic base for improved insulation. Its ruggedized construction, double-leaf getter, and higher-grade materials distinguish it from standard commercial 807 variants and reflect GEC’s high engineering standards for military and industrial applications. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e GEC VT60\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGetter Type:\u003c\/strong\u003e Double Leaf Getter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Type: \u003c\/strong\u003eWhite Ceramic Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e England\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in Original Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":48020614971628,"sku":"APS-1396-1","price":634.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":48020615004396,"sku":"APS-1396-2","price":574.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":48020615037164,"sku":"APS-1396-3","price":535.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":48020615069932,"sku":"APS-1396-4","price":1268.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":48020615102700,"sku":"APS-1396-5","price":1149.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":48020615135468,"sku":"APS-1396-6","price":1070.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":48020615168236,"sku":"APS-1396-7","price":307.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":48020615201004,"sku":"APS-1396-8","price":277.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":48020615233772,"sku":"APS-1396-9","price":257.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/GECVT60_4.jpg?v=1785253110"},{"product_id":"marconi-osram-valve-co-vt25-det25-7312","title":"Marconi-Osram Valve Co. VT25 (DET25\/ 7312) NOS Vacuum Tube","description":"\u003cdiv class=\"\"\u003e\n\u003csection dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot qMYqUG_convSearchResultTextHighlightSafari\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThis rare British DET25 \/ VT25 (Air Ministry designation 10E\/7312) directly heated transmitting triode was manufactured by M.O.V. (Marconi-Osram Valve Co.) on May 7, 1936, for military and professional radio service, including communications equipment associated with the Royal Air Force. Developed as a rugged high-voltage member of the Type 10 triode family, the DET25 features heavier internal construction and wider electrode spacing than typical American VT25 variants. \u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eArchive Assessed, Apos Assured\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAll Archive tubes are thoroughly tested, inspected, photographed, and inventoried, guaranteeing the quality of each tube that's shipped to customers. All tubes carry an Apos 12-month warranty against manufacturing defects.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAre the tubes...dusty...?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBecause these are genuine New Old Stock tubes, small cosmetic irregularities may be present. These aren't defects but artifacts of vintage manufacturing and decades of storage. They have no impact on reliability or sonic performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \/ Type:\u003c\/strong\u003e Marconi-Osram Valve Co. VT25 (DET25\/ 7312)\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e England\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Type:\u003c\/strong\u003e NOS in Brown Military Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested on:\u003c\/strong\u003e Amplitrex AT1000 Advanced Digital Tube Tester\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Archive Tubes","offers":[{"title":"Matched Pair (2 Tubes) \/ Archive Vault","offer_id":48020620083436,"sku":"APS-1398-1","price":2440.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Gold","offer_id":48020620116204,"sku":"APS-1398-2","price":2200.0,"currency_code":"USD","in_stock":true},{"title":"Matched Pair (2 Tubes) \/ Silver","offer_id":48020620148972,"sku":"APS-1398-3","price":2040.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Archive Vault","offer_id":48020620181740,"sku":"APS-1398-4","price":4880.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Gold","offer_id":48020620214508,"sku":"APS-1398-5","price":4400.0,"currency_code":"USD","in_stock":true},{"title":"Matched Quad (4 Tubes) \/ Silver","offer_id":48020620247276,"sku":"APS-1398-6","price":4080.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Archive Vault","offer_id":48020620280044,"sku":"APS-1398-7","price":1210.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Gold","offer_id":48020620312812,"sku":"APS-1398-8","price":1090.0,"currency_code":"USD","in_stock":true},{"title":"Singles  (1 Tube) \/ Silver","offer_id":48020620345580,"sku":"APS-1398-9","price":1010.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/WhatsAppImage2026-07-28at11.11.34_1.jpg?v=1785257117"}],"url":"https:\/\/apos.audio\/collections\/vacuum-tubes.oembed?page=2","provider":"Apos","version":"1.0","type":"link"}