{"product_id":"hongshu-eh-1-eha-1","title":"HONGSHU Audio EH-1 \u0026 EHA-1 Electrostatic Headphone System","description":"\u003ch2\u003eIn stock.\u003cbr\u003e\u003cbr\u003eHONGSHU Audio EH-1 V4\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eUS$700 delivered worldwide, shipping and import duties included.\u003c\/strong\u003e Checkout is in New Taiwan dollars (NT$22,880); PayPal converts it to your own currency.\u003c\/p\u003e\n\u003cp\u003eAt its core is a large 4-inch circular electrostatic diaphragm in a fully open design. The large diaphragm opens up both depth and width of the soundstage, and with the fine resolution and smooth response electrostatic drivers are known for, you can hear the delicate layer of air in the music without it ever turning harsh or tiring.\u003c\/p\u003e\n\u003cp\u003eIt weighs just 295 g without the cable, which is very light for an electrostatic headphone. The clamping force has also been retuned, so long orchestral works or an all-night listening marathon stay comfortable, and after a while you almost forget you are wearing it.\u003c\/p\u003e\n\u003ch3\u003eNot just faithful, but adjustable\u003c\/h3\u003e\n\u003cp\u003eIt comes with the dedicated EHA-1 amplifier, so it is a complete electrostatic system right out of the box.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e300 Vrms full-range drive\u003c\/strong\u003e: with the standard 580 V Pro Bias, it can drive most electrostatic headphones on the market.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTAX standard connector\u003c\/strong\u003e: uses the STAX connector and voltage standard, compatible with mainstream electrostatic gear, so other electrostatic headphones you own will plug right in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEven runs from a power bank\u003c\/strong\u003e: far smaller and more efficient than comparable electrostatic amplifiers. The included 12 V power supply accepts 100–240 V, so it works in any country (a simple plug adapter may be needed for your outlet), and a regular power bank can drive it too.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeft-right balance knob\u003c\/strong\u003e: if you notice a slight channel difference on a humid day, the knob on the back lets you correct it on the spot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass Boost switch\u003c\/strong\u003e: turn it on for large-scale works or movies for a little more weight in the low end.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0720\/3251\/8314\/files\/hongshu-eh1-eha1-system_1.png?v=1788785280\u0026amp;width=1400\" alt=\"HONGSHU Audio EH-1 electrostatic headphone and EHA-1 dedicated amplifier\" style=\"width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEH-1 electrostatic headphone (with SP-1V ear pads)\u003c\/li\u003e\n\u003cli\u003eEHA-1 electrostatic headphone amplifier\u003c\/li\u003e\n\u003cli\u003eEC-1 headphone cable, 1.8 m (detachable)\u003c\/li\u003e\n\u003cli\u003e2 mm hex key (stored in the accessory box)\u003c\/li\u003e\n\u003cli\u003e12 V power supply (100–240 V input)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0720\/3251\/8314\/files\/309846_935372.jpg?v=1786083736\" alt=\"HONGSHU Audio EH-1 \u0026amp; EHA-1 electrostatic headphone system\"\u003e\u003c\/p\u003e\n\u003ch3\u003eNot adjectives, but measurements\u003c\/h3\u003e\n\u003cp\u003eThe frequency response of the EH-1 is measured by the maker on a B\u0026amp;K 5128 head and torso simulator. This is today's high-end standard for headphone measurement: a realistic ear canal and head acoustic model replaces the traditional flat-plate coupler, so the curve is closer to what your ears actually hear when wearing the headphone.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0720\/3251\/8314\/files\/hongshu-eh1-frequency-response_1.png?v=1788785280\u0026amp;width=1500\" alt=\"HONGSHU EH-1 electrostatic headphone frequency response measured on B\u0026amp;K 5128\" style=\"width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003eThe green line is normal mode and the red dashed line is with Bass Boost on, measured with the original oval-cavity ear pads.\u003c\/small\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEH-1 electrostatic headphone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: over-ear\u003c\/li\u003e\n\u003cli\u003eDriver: 4-inch electrostatic driver\u003c\/li\u003e\n\u003cli\u003eSensitivity: 102 dB @ 100 Vrms\u003c\/li\u003e\n\u003cli\u003eFrequency response: 6–42,000 Hz\u003c\/li\u003e\n\u003cli\u003eCapacitance: 100 pF (including 1.8 m cable)\u003c\/li\u003e\n\u003cli\u003eCable: 1.8 m standard cable, detachable\u003c\/li\u003e\n\u003cli\u003eWeight: 295 g (without cable)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEHA-1 electrostatic headphone amplifier\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower supply: DC 12 V (adapter input 100–240 V) | Rated power: 5 W\u003c\/li\u003e\n\u003cli\u003eStandard input level: 2 Vrms | Input impedance: 10 kΩ\u003c\/li\u003e\n\u003cli\u003eMaximum output level: 300 Vrms @ 1% THD\u003c\/li\u003e\n\u003cli\u003eHarmonic distortion: THD \u0026lt; 0.001% @ 100 Vrms\u003c\/li\u003e\n\u003cli\u003eFrequency response: 10–25,000 Hz (−1 dB)\u003c\/li\u003e\n\u003cli\u003eBias: 580 V | Weight: 375 g\u003c\/li\u003e\n\u003cli\u003eDimensions: 110 × 120 × 38 mm (L × W × H)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping, payment and warranty\u003c\/h3\u003e\n\u003cp\u003eUS$700 is the full delivered price to any country: shipping and import duties are included, with nothing more to pay on delivery. Pay at checkout with PayPal (PayPal balance or any card). We ship from Taiwan with tracking.\u003c\/p\u003e\n\u003cp\u003eOrders shipped outside Taiwan carry a 12-month warranty. If the system needs service, you ship it to us in Taiwan and we pay the return shipping to you.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are Halo Acoustics and HONGSHU Audio the same brand?\u003c\/strong\u003e\u003cbr\u003e\nYes. The English name of 虹曙音響 is \u003cstrong\u003eHONGSHU Audio\u003c\/strong\u003e, and \u003cstrong\u003eHalo Acoustics is an earlier name the brand no longer uses\u003c\/strong\u003e. You may still see both names on the market; look for HONGSHU Audio from the official distributor Soundessence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to buy a separate amplifier for an electrostatic headphone?\u003c\/strong\u003e\u003cbr\u003e\nNo. This set already includes the dedicated EHA-1 amplifier, so you just connect a source and listen. Electrostatic headphones cannot plug into a phone or a regular headphone amp like ordinary headphones; they need a dedicated high-voltage drive, which is what stops many people from trying them. The EH-1 solves that for you.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: I already have a STAX amplifier. Will the EH-1 work with it?\u003c\/strong\u003e\u003cbr\u003e\nYes. The EH-1 uses the 580 V Pro Bias standard connector and voltage, compatible with mainstream electrostatic gear. It works the other way too: the EHA-1 can drive your existing STAX headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which version will I get?\u003c\/strong\u003e\u003cbr\u003e\nAll current shipments are V4. Compared with earlier versions, the EHA-1 has an upgraded enclosure and adds the Bass Boost switch, and the ear pads have been redesigned for better comfort and soundstage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are electrostatic headphones sensitive to humidity?\u003c\/strong\u003e\u003cbr\u003e\nEarly electrostatic headphones were more sensitive to moisture and that impression has stuck around, but today's manufacturing and quality control have improved a lot and everyday use rarely runs into problems. On a particularly humid day, if you notice a slight difference between channels, the balance knob on the back of the EHA-1 lets you correct it on the spot.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long is the warranty, and how do repairs work?\u003c\/strong\u003e\u003cbr\u003e\nOrders shipped outside Taiwan carry a 12-month warranty. You ship the unit to us in Taiwan, we handle the repair with the maker and pay the return shipping, and we keep you updated along the way.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will the amplifier work with the power in my country?\u003c\/strong\u003e\u003cbr\u003e\nYes. The included 12 V power supply accepts 100–240 V input, so it works worldwide. Depending on your country, you may need a simple plug adapter for the outlet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should the ear pads be replaced?\u003c\/strong\u003e\u003cbr\u003e\nThere is no fixed schedule, but as ear pads age the seal weakens, and the most obvious change is thinner bass and a less precise image. If it no longer sounds like it did when new, replacing the ear pads is usually more effective than changing the cable or source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does a fully open design leak sound?\u003c\/strong\u003e\u003cbr\u003e\nYes, both ways: you hear the outside and the outside hears you. The fully open structure is what gives the soundstage its width and air, so it suits a quiet personal listening space.\u003c\/p\u003e\n\u003cp style=\"margin-top:28px;\"\u003eLearn more about the brand: \u003ca href=\"\/en\/pages\/about-hongshu\"\u003eAbout HONGSHU Audio\u003c\/a\u003e. Questions before you buy: \u003ca href=\"\/en\/pages\/contact\"\u003econtact us\u003c\/a\u003e.\u003c\/p\u003e\n","brand":"虹曙音響 HONGSHU Audio","offers":[{"title":"Default Title","offer_id":49018040549546,"sku":"HS-EH1-EHA1-SET","price":22880.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/3251\/8314\/files\/20260715141228_3_702.png?v=1788778254","url":"https:\/\/hongshuaudio.com.tw\/en\/products\/hongshu-eh-1-eha-1","provider":"虹曙音響 HONGSHU Audio 台灣","version":"1.0","type":"link"}