{"product_id":"used-open-box-fiio-k13-r2r-desktop-dac-amp","title":"Used \/ Open-Box FiiO K13 R2R Desktop DAC\/AMP","description":"\u003csection\u003e\n\u003ch2\u003eProduct overview\u003c\/h2\u003e\n\u003cp\u003eThe FiiO K13 R2R is a Desktop 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 USB, coaxial, optical, and Bluetooth receiving modes.\u003c\/li\u003e\n\u003cli\u003eFIIO-developed fully differential 24-bit R2R DAC architecture supports NOS and OS listening modes.\u003c\/li\u003e\n\u003cli\u003eXU316 USB decoding and Bluetooth 5.4 reception support desktop and wireless source use.\u003c\/li\u003e\n\u003cli\u003e4.4mm balanced and 6.35mm single-ended headphone outputs support a wide headphone range.\u003c\/li\u003e\n\u003cli\u003eRCA single-ended and XLR3 balanced line outputs support integration with compact audio systems.\u003c\/li\u003e\n\u003cli\u003e1.1-inch LCD, FIIO Control support, PEQ, MQA full decoding, and IR remote support improve desktop operation.\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 DAC\/AMP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDAC architecture\u003c\/th\u003e\n\u003ctd\u003eFIIO-developed R2R DAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSoC \/ USB\u003c\/th\u003e\n\u003ctd\u003eESP32-S3; XMOS XU316 USB decoding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAmplifier\u003c\/th\u003e\n\u003ctd\u003eOPA1642 x2 plus TPA6120A x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking modes\u003c\/th\u003e\n\u003ctd\u003eUSB DAC, coaxial decoding, optical decoding, Bluetooth receiving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupported formats\u003c\/th\u003e\n\u003ctd\u003eUSB up to 384kHz \/ 32-bit and DSD256; coaxial up to 192kHz \/ 24-bit and DSD64; optical up to 192kHz \/ 24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBluetooth\u003c\/th\u003e\n\u003ctd\u003eBluetooth 5.4 receiving with SBC, AAC, and LDAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e6.35mm headphone, 4.4mm balanced headphone, RCA line, XLR3 balanced line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBalanced output power\u003c\/th\u003e\n\u003ctd\u003eUp to L+R \u0026gt;= 2400mW + 2400mW at 32 ohms, high gain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions \/ weight\u003c\/th\u003e\n\u003ctd\u003eAbout 210 x 188 x 42 mm including feet; about 980 g\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 K13 R2R sits in the FiiO K Series and fits the Desktop audio converters and amplifiers category, making it relevant for buyers comparing Desktop 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 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":48313329385686,"sku":null,"price":249.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/SKU__1_ab4c225b-e2ef-4aea-aca0-99f4cd218dd3.jpg?v=1780369155","url":"https:\/\/www.hifiloop.com\/products\/used-open-box-fiio-k13-r2r-desktop-dac-amp","provider":"HiFiLoop","version":"1.0","type":"link"}