{"product_id":"srm-700s-electrostatic-headphone-driver-unit-color-black","title":"SRM-700S Electrostatic Headphone Driver Unit (Color Black)","description":"\u003cdiv class=\"my-[1px] [li\u0026gt;\u0026amp;:first-child]:mt-0 [li\u0026gt;\u0026amp;:last-child]:mb-0\"\u003e\n\u003cp class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003e\u003cstrong\u003ePure solid-state control. Uncompromising musical detail\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003eThe SRM-700S is a fully discrete, all-solid-state electrostatic driver designed for exceptional speed, authority and resolution. Its custom low-noise dual-FET input stage, J-FET amplification and large-current emitter-follower circuit are engineered to bring out the full potential of STAX PRO-bias earspeakers.\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003eWith up to 450 Vrms of output capability, the SRM-700S delivers confident control across demanding passages while preserving the smallest details in a recording. A carefully matched FET design, high-definition film capacitors and a power-transistor array with a substantial heatsink support stable, low-noise performance.\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003eBalanced XLR and RCA inputs make system integration straightforward, while the volume-bypass function and RCA parallel output offer added flexibility for more advanced setups.\u003c\/div\u003e\n\u003cp class=\"my-[1px] [li\u0026gt;\u0026amp;:first-child]:mt-0 [li\u0026gt;\u0026amp;:last-child]:mb-0\"\u003e \u003c\/p\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003eChoose the SRM-700S for a fast, clean and highly precise presentation that lets complex recordings remain composed, articulate and deeply revealing.\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"py-[3px] [li\u0026gt;*:first-child\u0026gt;\u0026amp;]:pt-0 [li\u0026gt;*:last-child\u0026gt;\u0026amp;]:pb-0 whitespace-pre-wrap u-break-words\"\u003e\u003cstrong\u003eKey highlights\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003eFully discrete all-FET DC amplification design\u003c\/li\u003e\n\u003cli\u003eJ-FET amplification and large-current emitter-follower output circuit\u003c\/li\u003e\n\u003cli\u003eUp to 450 Vrms maximum output\u003c\/li\u003e\n\u003cli\u003eFast, controlled and highly detailed sound\u003c\/li\u003e\n\u003cli\u003eSwitchable RCA and balanced XLR inputs\u003c\/li\u003e\n\u003cli\u003eVolume-bypass function and RCA parallel output\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003eDesigned for STAX PRO-bias (580 V) earspeakers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: All-stage FET configuration DC amplification driver unit\u003c\/li\u003e\n\u003cli\u003eFrequency response: DC - 100kHz (with one SR-009S)\u003c\/li\u003e\n\u003cli\u003eGain: 60dB\u003c\/li\u003e\n\u003cli\u003eHarmonic distortion: 0.01% or less (1kHz\/100Vrms output)\u003c\/li\u003e\n\u003cli\u003eInput impedance: 50kΩ (RCA), 50kΩx 2 (XLR)\u003c\/li\u003e\n\u003cli\u003eMaximum output voltage: 450Vrms (1kHz)\u003c\/li\u003e\n\u003cli\u003eBias voltage: PRO 580V\u003c\/li\u003e\n\u003cli\u003eOperating temperature \/ humidity: 0 to 35 degrees C \/ less than 90% (non condensing)\u003c\/li\u003e\n\u003cli\u003eInput terminal: RCA x 1, XLR x 1\u003c\/li\u003e\n\u003cli\u003eOutput: RCA parallel output terminal\u003c\/li\u003e\n\u003cli\u003ePower consumption: 46W\u003c\/li\u003e\n\u003cli\u003eDimensions: 240W x 103H x 393D mm (maximum protruding portion included) \u003c\/li\u003e\n\u003cli\u003eWeight: 6.3kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003ca href=\"https:\/\/www.stereophile.com\/content\/gramophone-dreams-102-stax-sr-007s-earspeakers\" title=\"Gramophone Dreams #102: Stax SR-007S Earspeakers\"\u003e\u003cspan class=\"field field--name-title field--type-string field--label-hidden\"\u003eGramophone Dreams #102: Stax SR-007S Earspeakers\u003c\/span\u003e\u003c\/a\u003e\u003c\/h2\u003e\n\u003cp class=\"meta-data\"\u003e\"Stax's SRM-700S driver unit is all JFET, and it is so transparent I swear that in the quiet passages I could hear its JFETs flowing current. Which suggests the 700S is a simple, naturally clean design with minimal feedback. Listening to Serge Gainsbourg's Histoire de Melody Nelson, my attention kept focusing on how Serge and Jane Birkin pronounced their words. With the 700S powering the 007S, each word had its own shape and internal structure.” - \u003cem\u003eHerb Reichert\u003c\/em\u003e\u003c\/p\u003e","brand":"STAX Headphones","offers":[{"title":"Default Title","offer_id":50573858373715,"sku":null,"price":3400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2156\/2219\/files\/SRM-700S_black_front.png?v=1790666983","url":"https:\/\/staxheadphones.com\/products\/srm-700s-electrostatic-headphone-driver-unit-color-black","provider":"STAX Headphones","version":"1.0","type":"link"}