{"product_id":"fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier","title":"FIIO K13 Compact Desktop R2R architecture DAC and Headphone Amplifier","description":"\u003cp\u003eThe FiiO K13 R2R is a desktop DAC, headphone amplifier and preamp built around FiiO’s own fully differential 24-bit R2R resistor-array DAC, for a uniquely rich and musical sound. Its fully balanced circuit delivers 2,400mW per channel from the 4.4mm output, XLR and RCA outputs feed active speakers or a power amplifier, and USB, coaxial, optical and LDAC Bluetooth inputs, a 10-band PEQ, a remote and AC or DC power make it a complete desktop hub. It won Headfonics’ Writer’s Choice 2025 (Bang for Buck) and an “Outstanding” rating from A British Audiophile.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-pair.jpg?v=1791333522\" alt=\"FiiO K13 R2R desktop DAC\/amps in silver and black\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eA fully differential 24-bit R2R DAC\u003c\/h3\u003e\n\u003cp\u003eFiiO’s proprietary four-channel, fully differential R2R DAC uses 48 precision thin-film resistors per channel, 192 in all, each with 0.1% accuracy and low (30ppm) temperature drift. An FPGA feeds the four ladders. Compared with a typical architecture, the fully differential design gives lower noise and fewer FFT harmonics, for a darker musical background.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-r2r.jpg?v=1791333528\" alt=\"The R2R resistor array and FPGA signal path of the FiiO K13 R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-fft.jpg?v=1791333534\" alt=\"Waveforms and FFT of the fully differential and typical architectures\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eNOS and OS modes\u003c\/h3\u003e\n\u003cp\u003eNOS (non-oversampling) mode decodes at the original sample rate for an authentic, organic and captivating sound; OS (oversampling) mode upsamples everything to 384kHz for an even more refined, clear sound. DSD is decoded natively as 1-bit (it plays slightly quieter, which is normal). As FiiO says, which you prefer is personal.\u003c\/p\u003e\n\u003ch3\u003eA fully balanced amplifier\u003c\/h3\u003e\n\u003cp\u003eThe whole chain, from the R2R DAC and low-pass filter to the volume control and the OPA1642 and TPA6120A headphone amplifier, is fully differential, for strong interference rejection, minimal distortion and wide dynamic range, with gain control, headphone protection and pop elimination. It delivers 2,400mW + 2,400mW into 32Ω balanced (600mW into 300Ω) and 1,220mW from the 6.35mm output, enough to bring out every detail from both sensitive IEMs and full-size headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-power.jpg?v=1791333539\" alt=\"FiiO K13 R2R delivering 2,400mW\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eThree gains, three volume curves\u003c\/h3\u003e\n\u003cp\u003eEach of the three gain levels has its own volume curve, so the K13 R2R adapts to all kinds of IEMs and headphones, and the headphone and preamp volumes are remembered separately.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-curves.jpg?v=1791333545\" alt=\"Volume curves for the three gain levels of the FiiO K13 R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eA specially designed power supply\u003c\/h3\u003e\n\u003cp\u003eThe built-in 30W switching supply sits under a nickel-plated alloy shield for better interference resistance and cleaner power. A multi-rail design with up to 18 low-noise LDOs and five DC-DC converters gives strong, clean power, and ELNA RA3 silk-film audio capacitors and audio tantalum capacitors keep it pure and stable for a warm, natural sound. An external DC input (12V, 2.5A or more, 5.5 × 2.1mm) lets you add a high-performance linear supply for a different sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-shield.jpg?v=1791333549\" alt=\"The shielded switching power supply of the FiiO K13 R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-caps.jpg?v=1791333554\" alt=\"ELNA RA3 audio capacitors in the FiiO K13 R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003ePreamp, DAC and Bluetooth hub\u003c\/h3\u003e\n\u003cp\u003eWith inputs for USB (PCM 384kHz\/32-bit, DSD256 and MQA), coaxial and optical (192kHz\/24-bit) and Bluetooth 5.4 (LDAC, AAC and SBC), and XLR and RCA outputs, the K13 R2R works as a preamplifier for active speakers or a power amplifier as well as a headphone amp.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-rear.jpg?v=1791333558\" alt=\"Rear of the FiiO K13 R2R with XLR and RCA outputs, inputs and Bluetooth aerial\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eA 10-band PEQ\u003c\/h3\u003e\n\u003cp\u003eThe XMOS XU316 platform runs a 10-band PEQ in every mode: use presets such as “Retro PEQ”, simulate or correct your headphones’ response, auto-EQ, and export, import, share and save curves in the FiiO Control app, or in the web version at fiiocontrol.fiio.com when using USB (PEQ works up to 192kHz\/24-bit).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-peq.jpg?v=1791333563\" alt=\"Setting the FiiO K13 R2R PEQ on a computer\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDisplay, skylight and controls\u003c\/h3\u003e\n\u003cp\u003eA custom high-contrast LCD shows the sample rate, volume, gain and output mode, and can stay on without burn-in. The thick unibody aluminium case continues the K11 series’ minimalist style, with a new “skylight” window onto the R2R resistors and flowing, customisable RGB lighting that shows the sample rate. Control it with two knobs, the infrared remote or the FiiO Control app; overheating and overload protection and a 1–99 minute sleep timer add peace of mind.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-skylight.jpg?v=1791333569\" alt=\"The skylight window of the FiiO K13 R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDAC\u003c\/th\u003e\n\u003ctd\u003eFiiO 24-bit R2R, 4-channel fully differential (192 × 0.1% resistors) · NOS\/OS (384kHz) · XMOS XU316\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAmplifier\u003c\/th\u003e\n\u003ctd\u003e2 × OPA1642 + 2 × TPA6120A · fully balanced · 3 gains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone outputs\u003c\/th\u003e\n\u003ctd\u003e4.4mm: 2,400mW\/ch @ 32Ω, 600mW @ 300Ω · 6.35mm: 1,220mW\/ch @ 32Ω, 150mW @ 300Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLine outputs\u003c\/th\u003e\n\u003ctd\u003eXLR balanced · RCA (preamp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eUSB-C (384kHz\/32-bit, DSD256, MQA) · coaxial (192kHz\/24-bit, DSD64) · optical (192kHz\/24-bit) · Bluetooth 5.4 (LDAC, AAC, SBC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eBuilt-in 30W, AC 100–240V · or 12V ≥2.5A DC (5.5 × 2.1mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize and weight\u003c\/th\u003e\n\u003ctd\u003e210 × 188 × 42mm (with feet) · about 980g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier-photo-box.jpg?v=1791333575\" alt=\"FiiO K13 R2R box contents\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor an external linear supply, the \u003ca href=\"\/products\/fiio-pl50-low-noise-regulated-power-supply\"\u003eFiiO PL50\u003c\/a\u003e gives 12V on a 5.5 × 2.1mm plug.\u003c\/li\u003e\n\u003cli\u003eThe smaller \u003ca href=\"\/products\/fiio-k11-compact-desktop-r2r-architecture-dac-and-headphone-amplifier\"\u003eK11 R2R\u003c\/a\u003e uses a similar R2R design.\u003c\/li\u003e\n\u003cli\u003eIn the box: K13 R2R, infrared remote, AC power cord, USB cable, headphone adapter, quick start guide and warranty card. Black or silver.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FiiO","offers":[{"title":"BLACK","offer_id":57117515678083,"sku":"FIIOK13-R2R-BLACK","price":279.99,"currency_code":"GBP","in_stock":true},{"title":"SILVER","offer_id":57117515710851,"sku":"FIIOK13-R2R-SILVER","price":279.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/img_proxy_b505b41e-b8e8-4ae6-b7e3-ded48b763e6a.jpg?v=1767219484","url":"https:\/\/www.advancedmp3players.co.uk\/products\/fiio-k13-compact-desktop-r2r-architecture-dac-and-headphone-amplifier","provider":"amp3","version":"1.0","type":"link"}