{"product_id":"cayin-ha-1a-mk3-tube-headphone-amplifier","title":"Cayin HA-1A MK3 Tube Headphone Amplifier","description":"\u003ch1\u003e\u003cstrong\u003eClass-A 12AU7 headphone amp and preamp\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe Cayin HA-1A MK3 is a compact Class-A tube headphone amplifier and preamplifier built around 12AU7\/ECC82 and EL84\/6BQ5-family vacuum tubes. Dedicated power and output transformers support its fully analog signal path, while selectable headphone impedance matching and 6.35 mm or 4-pin XLR outputs provide flexibility across a wide range of headphones.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003ePure tube amplification\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe HA-1A MK3 uses two JJ 12AU7\/ECC82 tubes alongside two Electro-Harmonix EL84EH\/6BQ5 tubes. Its vacuum-tube circuit is designed around the tonal density, smooth character, and expressive presentation associated with Cayin’s dedicated tube amplifiers.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eClass A operation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eClass-A amplification keeps the output stage operating continuously through the signal cycle, prioritizing linear operation over maximum efficiency. Cayin has tuned the HA-1A MK3 for detail, dynamics, tonal weight, and comfortable extended listening across a broad range of music.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003ePurpose-designed transformers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCayin developed dedicated power and output transformers specifically for the HA-1A MK3 circuit. Separate power-supply sections and a carefully arranged internal layout provide a stable electrical foundation while helping reduce unwanted interference within the amplifier.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFlexible headphone matching\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA two-position impedance selector accommodates headphones with different electrical requirements. The Low setting supports 8–150 ohms, while the High setting covers 151–600 ohms. This allows the amplifier to work with low-impedance planar magnetic headphones as well as higher-impedance dynamic designs.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBalanced and single-ended outputs\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe front panel provides a 6.35 mm single-ended headphone output rated at 2,400 mW + 2,400 mW and a 4-pin XLR balanced output rated at 2,700 mW + 2,700 mW. Both connections give users practical flexibility when pairing the amplifier with different headphone cables and terminations.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eDedicated preamplifier output\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA rear-panel RCA PRE-OUT allows the HA-1A MK3 to serve as a tube preamplifier for active loudspeakers or an external power amplifier. With two pairs of RCA inputs, the amplifier can sit at the center of a compact desktop audio system while handling both headphone and speaker-based listening.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSelected internal components\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAn ALPS volume potentiometer joins the custom transformers and dedicated power-supply sections inside the chassis. Cayin combines these components with hand assembly and inspection as part of its established tube-amplifier manufacturing approach.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eProd\u003c\/strong\u003e\u003cstrong\u003euct highlights\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClass-A vacuum-tube headphone amplifier\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTwo JJ 12AU7\/ECC82 tubes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTwo Electro-Harmonix EL84EH\/6BQ5 tubes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDedicated power and output transformers\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLow and High headphone impedance matching\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e6.35 mm single-ended headphone output\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e4-pin XLR balanced headphone output\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUp to 2,700 mW + 2,700 mW rated balanced output power\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRCA preamplifier output\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTwo pairs of RCA audio inputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eALPS volume potentiometer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompact desktop chassis\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAmplification topology: Class A vacuum tube\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRated output power, 6.35 mm: 2,400 mW + 2,400 mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRated output power, 4-pin XLR: 2,700 mW + 2,700 mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFrequency response: 20 Hz–20 kHz, -3 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone output THD: 0.3% at 1 kHz and 200 mW, less than 5% at rated output power\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone output sensitivity: 1,200–2,000 mV\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone output SNR: 110 dB A-weighted\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone impedance setting, Low: 8–150 ohms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone impedance setting, High: 151–600 ohms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone outputs: 6.35 mm single-ended and 4-pin XLR balanced\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier maximum output voltage: 5 V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier gain: 9 dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier THD: 0.1% at 2 V RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier SNR: 105 dB A-weighted\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier input sensitivity: 750 mV\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier output impedance: 1.5 kohms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreamplifier output: 1 pair RCA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput impedance: 23 kohms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAudio inputs: 2 pairs RCA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVacuum tubes: JJ 12AU7\/ECC82 ×2 and Electro-Harmonix EL84EH\/6BQ5 ×2\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDimensions, W × D × H: 9.45 × 9.45 × 5.51 in (240 × 240 × 140 mm)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNet weight: 19.4 lb (8.8 kg)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuse, AC 220–240 V: T500mAL250V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuse, AC 100–120 V: T1AL250V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaximum power consumption: 62 W\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCayin HA-1A MK3 tube headphone amplifier\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eJJ 12AU7\/ECC82 vacuum tubes ×2\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectro-Harmonix EL84EH\/6BQ5 vacuum tubes ×2\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdditional package contents were not specified in the provided launch materials\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Cayin","offers":[{"title":"Default Title","offer_id":48342460268780,"sku":"APS-1422-1","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/apos-audio-cayin-headphone-amp-tube-cayin-ha-1a-mk3-tube-headphone-amplifier-1258295978.jpg?v=1789136952","url":"https:\/\/apos.audio\/products\/cayin-ha-1a-mk3-tube-headphone-amplifier","provider":"Apos","version":"1.0","type":"link"}