{"product_id":"used-open-box-fiio-k11-r2r-desktop-r2r-dac-amp","title":"Used \/ Open-Box FiiO K11 R2R Desktop R2R DAC\/AMP","description":"\u003csection\u003e\n\u003ch2\u003eProduct overview\u003c\/h2\u003e\n\u003cp\u003eThe FiiO K11 R2R is a Desktop R2R DAC\/AMP for connecting digital sources to headphones or compact audio systems. HiFiLoop uses this page as a focused model page for used \/ open-box private-quote requests.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesktop R2R DAC and headphone amplifier for compact desktop headphone systems.\u003c\/li\u003e\n\u003cli\u003eFIIO-developed fully differential 24-bit R2R DAC uses precision resistor arrays.\u003c\/li\u003e\n\u003cli\u003eNOS and OS modes support different R2R decoding presentations.\u003c\/li\u003e\n\u003cli\u003eUSB decoding supports high-resolution PCM and DSD playback paths.\u003c\/li\u003e\n\u003cli\u003e6.35mm single-ended and 4.4mm balanced headphone outputs support common desktop headphone cables.\u003c\/li\u003e\n\u003cli\u003eThree gain levels, custom LCD display, RGB logo lighting, and line \/ pre-output modes support daily desktop use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct type\u003c\/th\u003e\n\u003ctd\u003eDesktop R2R DAC\/AMP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardware solution\u003c\/th\u003e\n\u003ctd\u003eGD32F303RE SoC; FIIO-developed R2R DAC; SA9312L USB decoding; SGM8262-2 x2 amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDAC architecture\u003c\/th\u003e\n\u003ctd\u003eFour-channel fully differential 24-bit R2R DAC with 192 precision thin-film resistors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModes\u003c\/th\u003e\n\u003ctd\u003eNOS and OS decoding modes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupported formats\u003c\/th\u003e\n\u003ctd\u003eUSB DAC up to 384kHz \/ 32-bit and DSD256\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e6.35mm headphone output, 4.4mm balanced headphone output, RCA line \/ pre-output modes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput power\u003c\/th\u003e\n\u003ctd\u003eBalanced output up to 1300mW + 1300mW at 32 ohms under FIIO listed conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGain \/ volume\u003c\/th\u003e\n\u003ctd\u003eThree gain levels and three volume curves with NJW1195A electronic volume control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eCustom LCD screen with sampling-rate, volume, gain, and output-mode status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSeries \/ category notes\u003c\/h2\u003e\n\u003cp\u003eThe K11 R2R sits in the FiiO K Series and fits the Desktop audio converters and amplifiers category, making it relevant for buyers comparing Desktop R2R DAC\/AMP options in similar listening setups.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eCondition \u0026amp; availability\u003c\/h2\u003e\n\u003cp\u003eReference page only. Manual availability check required.\u003c\/p\u003e\n\u003cp\u003eThis is a used \/ open-box reference listing.\u003c\/p\u003e\n\u003cp\u003eFinal pricing, condition, accessories, and availability are confirmed case by case.\u003c\/p\u003e\n\u003cp\u003eReference price is for price context only. Availability and final quote are confirmed manually before payment. New or like-new options can be checked on request.\u003c\/p\u003e\n\u003cp\u003eFor this Desktop R2R DAC\/AMP unit, HiFiLoop checks functional status, cosmetic condition, included accessories, version details, photos, and known limitations before quoting. Where relevant, battery behavior, charging, controls, ports, and connectivity are reviewed for the specific unit being offered.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eShipping \u0026amp; support\u003c\/h2\u003e\n\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\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does Reference price mean?\u003c\/h3\u003e\n\u003cp\u003eReference price is for price context only. It is a planning guide, not a final selling price. Final terms are confirmed with the exact unit.\u003c\/p\u003e\n\u003ch3\u003eIs this exact unit ready to ship?\u003c\/h3\u003e\n\u003cp\u003eManual availability check required. This page identifies the model, not a guaranteed ready-to-ship unit. Timing is confirmed during the quote process.\u003c\/p\u003e\n\u003ch3\u003eCan HiFiLoop help me find another unit?\u003c\/h3\u003e\n\u003cp\u003eYes. New or like-new options can be checked on request. Share your preferred condition, accessories, budget range, and region so HiFiLoop can look for another suitable used \/ open-box option.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"FiiO","offers":[{"title":"Default Title","offer_id":48314327367894,"sku":null,"price":149.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/SKU__1_e9aa0200-1e65-4a49-857e-8dfef01e506f.jpg?v=1780383916","url":"https:\/\/www.hifiloop.com\/products\/used-open-box-fiio-k11-r2r-desktop-r2r-dac-amp","provider":"HiFiLoop","version":"1.0","type":"link"}