{"product_id":"fiio-warmer-desktop-r2r-tube-buffer-and-dac","title":"FiiO WARMER - Desktop R2R Tube Buffer and DAC","description":"\u003cp\u003eThe FiiO WARMER R2R is a desktop DAC that pairs FiiO’s own 24-bit R2R resistor-ladder DAC with a tube buffer of four JJ Electronic E88CC valves, to give your music an invitingly warm, rich tube sound. Two big backlit mechanical VU meters swing with the music, a 46W toroidal linear power supply keeps it clean, and USB, coaxial and optical inputs feed RCA and XLR balanced outputs for your amplifier, active speakers or headphone amp. It won a CIHE EHA 2025 Technology Innovation Award and an Editor’s Choice from Poland’s Audio Video magazine, and is Hi-Res Audio certified.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-black.jpg?v=1791322346\" alt=\"FiiO WARMER R2R tube DAC in black with its backlit VU meters\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eGo for a bolder flavour\u003c\/h3\u003e\n\u003cp\u003eThe WARMER takes its inspiration from the legacy of the timeless Hong Kong band the Wynners, and as its name suggests, it aims to infuse music with a warm, beautiful tube sound. From the sway of the warm-hued VU meters to the pairing of an R2R DAC with vacuum tubes, you can sense the warmth of the music every time you listen.\u003c\/p\u003e\n\u003ch3\u003eFiiO’s own fully differential R2R DAC\u003c\/h3\u003e\n\u003cp\u003eThe star of the show is FiiO’s proprietary four-way, fully differential, true 24-bit R2R DAC: 192 high-precision thin-film resistors (48 in each of the four arrays) with 0.1% accuracy and an ultra-low drift of 30ppm. It gives the WARMER its distinctly captivating sound. An FPGA turns the incoming serial data into parallel data for the four resistor arrays; DSD is converted to PCM first.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-r2r.jpg?v=1791322351\" alt=\"Diagram of the FiiO WARMER R2R DAC: FPGA and four 24-bit R2R arrays\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eNOS or OS: two flavours\u003c\/h3\u003e\n\u003cp\u003eA switch on the back chooses the mode. NOS (non-oversampling) decodes at the original sample rate, for the allure of pure, original audio. OS (oversampling) upsamples everything to 384kHz, for better audio performance and a more detailed, clearer sound.\u003c\/p\u003e\n\u003ch3\u003eFour JJ Electronic E88CC tubes\u003c\/h3\u003e\n\u003cp\u003eThe tube buffer stage uses four brand-new JJ Electronic E88CC valves from Slovakia, run from a ±28V supply and rated for a long 10,000-hour life. FiiO optimised the core circuit of the classic tube buffer preamplifier to impart a sweet, organic tube flavour, with real richness and fullness. JJ Electronic, founded in 1993, is a renowned maker of vacuum tubes, capacitors and amplifiers, widely used in guitar and hi-fi amplifiers, recording studios and audiophile equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-tubes.jpg?v=1791322357\" alt=\"The four JJ Electronic E88CC tubes inside the FiiO WARMER R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eExtra-large backlit VU meters\u003c\/h3\u003e\n\u003cp\u003eThe two retro, warm-hued, LED-backlit VU meters are true mechanical meters, driven by a dedicated chip. As the music plays, the needles move in time with it: don’t just listen to your music, see and feel it.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-silver.jpg?v=1791322363\" alt=\"FiiO WARMER R2R in silver\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003e46W linear power supply\u003c\/h3\u003e\n\u003cp\u003eA 46W low-noise, low-ripple toroidal audio transformer powers the WARMER. Its core, wound from non-oriented silicon steel strip, is efficient with low eddy-current losses, and its corner-free windings give a more uniform magnetic field with less leakage, so the circuits are fed clean power for a pristine sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-transformer.jpg?v=1791322368\" alt=\"The 46W toroidal transformer inside the FiiO WARMER R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cp\u003eConnect a computer, phone, digital music player, CD player and more by USB-C, coaxial or optical, and choose the input with the knob on the front. The RCA and XLR balanced line outputs work at the same time, at a fixed level, to feed speakers, amplifiers or headphone amplifiers. A rear switch selects UAC 2.0 or driver-free UAC 1.0, for games consoles such as the Nintendo Switch and PS5.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-switches.jpg?v=1791322374\" alt=\"The UAC and NOS\/OS switches on the back of the FiiO WARMER R2R\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-gaming.jpg?v=1791322377\" alt=\"FiiO WARMER R2R with games consoles, a phone and a tablet\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eMinimalist vintage look\u003c\/h3\u003e\n\u003cp\u003eLike FiiO’s K-series desktop units, the WARMER has a classic square-and-round design that blends vintage charm with minimalism. The grille lets heat escape quickly, so it keeps delivering high-quality sound for years. Choose black or silver.\u003c\/p\u003e\n\u003ch3\u003eSystems FiiO suggests\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeadphone system: a source such as the \u003ca href=\"\/products\/fiio-m21-digital-audio-player\"\u003eFiiO M21\u003c\/a\u003e, the WARMER, a \u003ca href=\"\/products\/fiio-k15-desktop-dac-and-headphone-amplifier\"\u003eFiiO K15\u003c\/a\u003e as the headphone amp, and \u003ca href=\"\/products\/fiio-ft13-closed-back-headphones\"\u003eFT13\u003c\/a\u003e headphones.\u003c\/li\u003e\n\u003cli\u003eCD system: the \u003ca href=\"\/products\/fiio-dp11-desktop-cd-player\"\u003eFiiO DP11\u003c\/a\u003e CD player into the WARMER, then a headphone amplifier and \u003ca href=\"\/products\/fiio-ft15-over-ear-headphones\"\u003eFT15\u003c\/a\u003e headphones.\u003c\/li\u003e\n\u003cli\u003eTV system: your TV’s digital output into the WARMER and on to \u003ca href=\"\/products\/fiio-sp5-high-fidelity-active-desktop-speakers\"\u003eFiiO SP5\u003c\/a\u003e active speakers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-stack.jpg?v=1791322381\" alt=\"FiiO WARMER R2R in a desktop headphone system with a K15\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-warmer-desktop-r2r-tube-buffer-and-dac-photo-tv.jpg?v=1791322386\" alt=\"FiiO WARMER R2R with a television and active speakers\" 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, four-way fully differential (192 thin-film resistors, 0.1%) · NOS\/OS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube buffer\u003c\/th\u003e\n\u003ctd\u003e4 × JJ Electronic E88CC · 2 × OPA1642\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eUSB-C (up to 384kHz\/32-bit, UAC 1.0\/2.0) · coaxial (192kHz\/24-bit) · optical (96kHz\/24-bit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e2 × RCA (1.8Vrms) · 2 × XLR balanced (3.3Vrms) · fixed level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003ctd\u003eSNR ≥114dB (XLR), ≥112dB (RCA) · dynamic range ≥105dB (XLR) · THD+N about 0.05%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e46W toroidal linear supply, mains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize and weight\u003c\/th\u003e\n\u003ctd\u003e223.5 × 213 × 66.8mm (with feet) · about 2.87kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe WARMER has no headphone output and no volume control: connect it to an amplifier, active speakers or a headphone amp. It isn’t controlled by the FiiO Control app.\u003c\/li\u003e\n\u003cli\u003eThe VU needles may sit up to ±1mm off zero, and the left and right needles may rest slightly apart; FiiO says this is within tolerance and doesn’t affect use.\u003c\/li\u003e\n\u003cli\u003eNewer batches have upgraded feet pads; FiiO confirms the circuitry and performance are unchanged.\u003c\/li\u003e\n\u003cli\u003eIn the box: WARMER R2R, mains cable, USB cable, spare fuse, quick start guide and warranty card.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FiiO","offers":[{"title":"BLACK","offer_id":57117535830403,"sku":"FIIOWARMER-BLACK","price":339.99,"currency_code":"GBP","in_stock":true},{"title":"SILVER","offer_id":57117535863171,"sku":"FIIOWARMER-SILVER","price":339.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/img_proxy_975d1b88-6b0c-41a5-9792-844c889d3de7.jpg?v=1767222340","url":"https:\/\/www.advancedmp3players.co.uk\/products\/fiio-warmer-desktop-r2r-tube-buffer-and-dac","provider":"amp3","version":"1.0","type":"link"}