{"product_id":"used-open-box-hifiman-ef400-desktop-dac-amplifier","title":"HIFIMAN EF400 Used \/ Open-Box Balanced Desktop DAC Amplifier","description":"\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eThe HIFIMAN EF400 is a balanced desktop DAC\/amplifier for headphone systems that need DAC conversion, headphone outputs, and line output in one desktop component. This used \/ open-box private quote page helps HiFiLoop confirm the exact unit, condition, accessories, and availability before quotation.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBalanced desktop DAC\/amplifier platform.\u003c\/li\u003e\n\u003cli\u003ePublished maximum power output is 4.4W per channel.\u003c\/li\u003e\n\u003cli\u003eLine-out THD+N is listed between 0.002% and 0.004%.\u003c\/li\u003e\n\u003cli\u003eChannel separation is published at 125±3dB, with 118±3dB A-weighted signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003eChassis dimensions and 3.08kg weight make it a compact but substantial desktop component.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eKey specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eBalanced desktop DAC \/ headphone amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTHD+N, line out\u003c\/th\u003e\n\u003ctd\u003eBetween 0.002% and 0.004%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChannel separation\u003c\/th\u003e\n\u003ctd\u003e125±3dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSignal-to-noise ratio\u003c\/th\u003e\n\u003ctd\u003e118±3dB, A-weighted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum power output\u003c\/th\u003e\n\u003ctd\u003e4.4W per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e246.5 × 228 × 61mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e3.08kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eSeries \/ category notes\u003c\/h2\u003e\u003cp\u003eEF400 sits in HIFIMAN’s desktop DAC\/amplifier category and should be checked for voltage version, rear-panel condition, and included power cable before quotation.\u003c\/p\u003e\u003ch2\u003eCondition \u0026amp; availability\u003c\/h2\u003e\u003cp\u003eThis is a used \/ open-box reference listing.\u003c\/p\u003e\u003cp\u003eFinal pricing, condition, accessories, and availability are confirmed case by case.\u003c\/p\u003e\u003ch2\u003eShipping \u0026amp; support\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e3-5 business days processing after confirmation\u003c\/li\u003e\n\u003cli\u003e7-15 days typical international shipping\u003c\/li\u003e\n\u003cli\u003eFree shipping over $199\u003c\/li\u003e\n\u003cli\u003e14-day DOA support\u003c\/li\u003e\n\u003cli\u003eRepair path from day 15 to day 180\u003c\/li\u003e\n\u003cli\u003eBuyer may be responsible for return shipping, taxes, and duties\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhat does this Reference Listing mean?\u003c\/h3\u003e\u003cp\u003eIt is a private quote page for a used \/ open-box unit. HiFiLoop confirms the exact unit details before quotation.\u003c\/p\u003e\u003ch3\u003eIs this exact unit ready to ship?\u003c\/h3\u003e\u003cp\u003eNot automatically. This page is used to request a quote and confirm a matching unit; availability is confirmed case by case.\u003c\/p\u003e\u003ch3\u003eCan HiFiLoop help me find another unit?\u003c\/h3\u003e\u003cp\u003eYes. If this configuration is not available, HiFiLoop can help look for a matching or comparable unit.\u003c\/p\u003e","brand":"HIFIMAN","offers":[{"title":"Default Title","offer_id":48351391940822,"sku":null,"price":189.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/1_1__2_f5ce35a1-e144-47b5-8638-b48a2dcb5075.jpg?v=1781186089","url":"https:\/\/www.hifiloop.com\/zh\/products\/used-open-box-hifiman-ef400-desktop-dac-amplifier","provider":"HiFiLoop","version":"1.0","type":"link"}