{"product_id":"es-lab-es-he90","title":"ES Lab ES-HE90 Headphones (Pre-Order Deposit)","description":"\u003cdiv class=\"product-intro\"\u003e\n\u003cdiv class=\"desc-highlight\" role=\"note\"\u003e\n\u003cstrong\u003eThe total price will be $6,000.\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e$200 refundable pre-order deposit today; $5,800 remaining balance.\u003c\/strong\u003e\u003cbr\u003eThe $5,800 balance is due when your headphones are ready to ship. We will try to notify you well in advance.\u003cbr\u003e\u003cstrong\u003ePRE-ORDER — Not in stock.\u003c\/strong\u003e\u003cbr\u003eES Lab estimates first-batch shipping in January 2027. This is a manufacturer estimate, not a guaranteed delivery date. HeadAmp allocation and your order's shipping date are subject to confirmation.\u003c\/div\u003e\n\u003cp class=\"fancy-quote\"\u003e\u003cstrong\u003eES Lab ES-HE90\u003c\/strong\u003e is an open-back electrostatic headphone inspired by the Sennheiser HE90, with glass electrodes, a 1-micron diaphragm and bubinga wood housings.\u003c\/p\u003e\n\u003cul class=\"desc-key-features\"\u003e\n\u003cli\u003eTotal price: $6,000. Reserve with a $200 refundable deposit; $5,800 remains to be paid. Includes an extra set of alternate-tuning earpads.\u003c\/li\u003e\n\u003cli\u003eElectrostatic drivers with precision-machined glass electrodes.\u003c\/li\u003e\n\u003cli\u003eReplaceable cable, headband and earpads; wooden storage case included.\u003c\/li\u003e\n\u003cli\u003eRequires a compatible electrostatic amplifier with a 5-pin Stax-type Pro Bias connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- split --\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003ePre-order information\u003c\/h2\u003e\n\u003cp\u003eYour $200 refundable deposit goes toward the $6,000 total price. The remaining $5,800 is due when your headphones are ready to ship. We will try to notify you well in advance.\u003c\/p\u003e\n\u003cp\u003eWe will email an invoice for the balance. You can pay using our online payment methods, or by bank transfer or check for a small discount. \u003ca href=\"\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e for details about the bank transfer or check discount.\u003c\/p\u003e\n\u003cdiv class=\"desc-cards\"\u003e\n\u003cdiv class=\"desc-card\"\u003e\n\u003ch3\u003eEstimated shipping\u003c\/h3\u003e\n\u003cp\u003eES Lab currently expects its first production batch to ship in January 2027. Later batches may ship later. \u003ca href=\"\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e to confirm the current allocation and estimated timing before ordering if you need delivery by a particular date.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"desc-card\"\u003e\n\u003ch3\u003ePre-order bonus\u003c\/h3\u003e\n\u003cp\u003ePre-orders include an additional set of earpads with alternate tuning. The total headphone price is $6,000. Your $200 refundable deposit is credited toward that total, leaving a $5,800 balance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a pre-order, not an in-stock item.\u003c\/strong\u003e Production and shipping estimates can change. An amplifier is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eGlass electrodes and a 1-micron diaphragm\u003c\/h2\u003e\n\u003cp\u003eThe ES-HE90 uses high-strength glass electrodes made with laser cutting and chemical etching. A chromium conducting layer and gold coating form part of the electrode structure. The elliptical diaphragm is made from 1-micron engineering plastic, and the drivers are assembled in a cleanroom.\u003c\/p\u003e\n\u003cp\u003eThis is ES Lab's own headphone, developed as a tribute to the original HE90. It is not a Sennheiser product.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eWood housings and replaceable parts\u003c\/h2\u003e\n\u003cp\u003eThe housings are made from African bubinga wood, with a sanded, coated and polished finish. The cable, headband and earpads can be replaced by hand. The hand-assembled earpads use polyurethane foam, and the alternate pads provide another tuning option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eTwo earpad tuning options\u003c\/h2\u003e\n\u003cp\u003eThe pre-order includes an extra set of alternate-tuning earpads. ES Lab describes the different pad combinations as offering a choice between a tuning closer to the original HE90 sound and one optimized for modern recordings.\u003c\/p\u003e\n\u003cp\u003eThe pads use polyurethane foam selected for its density, firmness and breathability. They are hand-assembled in ES Lab’s workshop and can be replaced by hand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eAmplifier requirements\u003c\/h2\u003e\n\u003cdiv class=\"desc-highlight\" role=\"note\"\u003e\n\u003cstrong\u003eAn electrostatic amplifier is required.\u003c\/strong\u003e The ES-HE90 uses a 5-pin Stax-type Pro Bias connector and a specified bias range of 500–580 V DC. It cannot connect directly to a standard headphone jack or conventional headphone amplifier. \u003ca href=\"\/pages\/contact-us\"\u003eAsk us\u003c\/a\u003e if you need help checking your amplifier.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eRecommended electrostatic amplifiers\u003c\/h2\u003e\n\u003cp\u003eWe recommend the \u003ca href=\"\/products\/blue-hawaii-se\"\u003eHeadAmp Blue Hawaii SE\u003c\/a\u003e, \u003ca href=\"\/products\/grand-cayman\"\u003eHeadAmp Grand Cayman (Pre-Order Deposit)\u003c\/a\u003e, and \u003ca href=\"\/products\/stax-srm-t8000\"\u003eSTAX SRM-T8000\u003c\/a\u003e for the ES-HE90. Amplifiers are sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"section-block\"\u003e\n\u003ch2 id=\"he90-specifications\"\u003eTechnical specifications\u003c\/h2\u003e\n\u003cdiv class=\"table-responsive\"\u003e\u003ctable aria-labelledby=\"he90-specifications\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTransducer\u003c\/th\u003e\n\u003ctd\u003eElectrostatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eAcoustic design\u003c\/th\u003e\n\u003ctd\u003eOpen-back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e20 Hz–41 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSensitivity\u003c\/th\u003e\n\u003ctd\u003e100 dB \/ 100 V r.m.s.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBias voltage\u003c\/th\u003e\n\u003ctd\u003e500–580 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTermination\u003c\/th\u003e\n\u003ctd\u003e5-pin Stax-type Pro Bias\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCable length\u003c\/th\u003e\n\u003ctd\u003e2.3 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e370 g without cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOperating temperature\u003c\/th\u003e\n\u003ctd\u003e0–35 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOperating humidity\u003c\/th\u003e\n\u003ctd\u003e0–90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eManufacturer warranty\u003c\/th\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eWhat's included\u003c\/h2\u003e\n\u003cdiv class=\"desc-included\"\u003e\u003cul\u003e\n\u003cli\u003eES Lab ES-HE90 headphones with cable and fitted earpads\u003c\/li\u003e\n\u003cli\u003eWooden storage case\u003c\/li\u003e\n\u003cli\u003eAdditional alternate-tuning earpads with pre-orders\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"section-block\"\u003e\n\u003ch2\u003eOfficial ES Lab illustrations\u003c\/h2\u003e\n\u003cp\u003eThese pages from ES Lab’s brochure show the construction, earpads and individual components.\u003c\/p\u003e\n\u003cdiv class=\"desc-cards\"\u003e\n\u003cdiv class=\"desc-card\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0024\/1788\/5248\/files\/es-he90-page-3.png?v=1794069677\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0024\/1788\/5248\/files\/es-he90-page-3.png?v=1794069677\" alt=\"ES Lab brochure: diaphragm, housing, assembly and earpad details; select to enlarge\" width=\"1500\" height=\"1786\" loading=\"lazy\" decoding=\"async\" style=\"display:block;width:100%;height:auto\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"desc-card\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0024\/1788\/5248\/files\/es-he90-page-4.png?v=1794069696\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0024\/1788\/5248\/files\/es-he90-page-4.png?v=1794069696\" alt=\"ES Lab brochure: replaceable parts, specifications, wood housing, electrode and earpad; select to enlarge\" width=\"1500\" height=\"1786\" loading=\"lazy\" decoding=\"async\" style=\"display:block;width:100%;height:auto\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.eslabhk.com\/_files\/ugd\/ba102b_5c26790549234351b7ad5985503d5bda.pdf\"\u003eView the full ES Lab ES-HE90 brochure (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ES Lab","offers":[{"title":"Default Title","offer_id":51533476069593,"sku":"ESHE90","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0024\/1788\/5248\/files\/es-he90-front-white-2000.jpg?v=1794074062","url":"https:\/\/www.headamp.com\/products\/es-lab-es-he90","provider":"HeadAmp","version":"1.0","type":"link"}