{"product_id":"stax-sr-009s-earspeakers","title":"STAX SR-009S Earspeakers","description":"\u003ch1\u003e\u003cstrong\u003eUltra-thin diaphragm with MLER 2 electrodes\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe STAX SR-009S is an open-back electrostatic headphone built around MLER 2 fixed electrodes and an ultra-thin diaphragm. Gold-plated electrodes help control resonance, while carefully finished openings allow sound to pass through with less air resistance. A precision-machined aluminum enclosure, leather ear pads, and an adjustable headband support comfortable listening.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eMultilayer electrodes with a smoother path for sound\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eMLER 2 advances the multilayer fixed-electrode technology introduced with the SR-009. An updated etching and finishing process smooths the edges of each electrode opening, reducing air resistance and improving acoustic transparency. This gives sound waves a clearer path through the electrode structure.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eGold plating for greater resonance control\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe ultra-thin fixed electrodes receive gold plating to help minimize resonance. Gold’s high density adds damping, while its conductivity reduces electrical resistance in the electrodes. These refinements support a presentation with clarity, fine detail, and well-defined texture.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAn ultra-thin diaphragm for fast transients\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SR-009S uses a diaphragm made from ultra-thin engineering plastic film. Its low moving mass supports a fast transient response across the audio spectrum, helping reproduce the attack and decay of voices and instruments.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA rigid aluminum enclosure\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003ePrecision-machined aluminum provides structural rigidity while keeping weight manageable. The redesigned body further reduces resonance, giving the electrostatic driver a stable supporting structure.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSilver-coated copper cable\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe supplied cable uses silver-coated 6N copper with a stated purity of 99.9999%. Its six-strand parallel construction forms a low-capacitance wide cable designed for electrostatic operation. At 8.2 feet (2.5 meters), it provides room to sit comfortably away from your amplifier.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eLeather pads for extended listening\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eHandcrafted ear pads combine genuine lamb leather at the skin-contact surface with high-quality synthetic leather around the surrounding portion. Moderately elastic cushioning provides support, while the leather contact surface helps manage moisture during longer listening sessions.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTen steps to a comfortable fit\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA 10-step headband slider lets you adjust the SR-009S to suit your head shape. The indexed positions make it easy to ensure a consistent fit.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePush-pull open-back electrostatic design\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMLER 2 multilayer fixed electrodes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSmoothed electrode openings for reduced air resistance\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGold-plated electrodes for resonance control\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUltra-thin engineering plastic film diaphragm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePrecision-machined aluminum construction\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSilver-coated 6N copper cable\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGenuine lamb leather ear pad contact surfaces\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e10-step adjustable headband\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e580V DC bias voltage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModel: STAX SR-009S\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eType: Push-pull open-back circular electrostatic headphone\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFrequency response: 5–42,000Hz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eElectrostatic capacitance: 110pF, including cable\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eImpedance: 145kΩ, including cable, at 10kHz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSound pressure sensitivity: 101dB at 100V RMS, 1kHz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaximum sound pressure: 118dB at 400Hz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBias voltage: 580V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEar pads: Genuine lamb leather at the skin-contact surface, high-quality synthetic leather around the surrounding portion\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadband adjustment: 10-step slider\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCable: Silver-coated 6N (99.9999%) OFC, parallel six-strand, low-capacitance wide construction\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCable length: 8.2 feet (2.5 meters)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight without cable: 1 lb (approximately 454g)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight with cable: 1.3 lb (approximately 590g)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eChannel identification: L and R markings inside the headband assembly, solid line on the left cable, dotted line on the right cable\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\u003eSTAX SR-009S electrostatic headphones with 8.2-foot (2.5-meter) cable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STAX","offers":[{"title":"Default Title","offer_id":67935971508460,"sku":"APS-1470-1","price":4545.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/SR-009S_main.jpg?v=1793042170","url":"https:\/\/apos.audio\/products\/stax-sr-009s-earspeakers","provider":"Apos","version":"1.0","type":"link"}