{"product_id":"fiio-warmer-desktop-r2r-tube-buffer-and-dac","title":"FiiO Warmer Desktop R2R Tube Buffer and DAC","description":"\u003cp\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003c\/span\u003e (updated Nov 25, 2025): Our inventory allocation has sold out and this product is backordered. New orders will ship on or before Feb. 7, 2026.\u003c\/em\u003e\u003c\/p\u003e\n \u003cp\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003c\/span\u003e (updated Jan 26, 4:30pm PT): Orders placed before today are on track to be fulfilled on or before Feb 7, 2026. All orders placed after this note will be part of the next batch with an estimated production completion timeline of end of April 2026. (updated April 8, 8:25pm PT) The production completion time has slipped slightly to May 15, 2026 now.\u003c\/em\u003e\u003c\/p\u003e\n \u003ch1\u003e\u003cstrong\u003eR2R desktop DAC with JJ tube buffer\u003c\/strong\u003e\u003c\/h1\u003e\n \u003cdiv\u003eThe WARMER R2R leans into tone. It’s a desktop R2R DAC with a tube buffer that adds body, color, and a relaxed kind of fullness that digital sometimes forgets. The fully-differential 24-bit resistor-array DAC sets the baseline with steady, unforced detail. Four JJ Electronic E88CC tubes bring a soft glow to the mids. Dual mechanical VU meters add a warm pulse to the room. With multiple digital and analog inputs, it works just as easily on a desk as it does in a living room system. When you want music to feel easy and inviting, this is a good way to get there.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eExtensive connectivity\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eUSB, optical, and coaxial inputs let you move between sources quickly. RCA and XLR outputs cover powered speakers, integrated amplifiers, and headphone amplifiers. Both outputs can run at the same time, which is handy if you enjoy switching between speakers and headphones during the day.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\n \u003cstrong\u003eFully-differential 24-bit R2R DAC\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cdiv\u003eFIIO’s four-way fully-differential R2R design uses 192 thin-film resistors with 0.1% accuracy and low drift. It delivers the grounded, weighted presentation R2R fans look for. Instruments sit where they should. Details feel natural rather than etched. It’s a DAC that trades flash for ease.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\n \u003cstrong\u003eTube warmth with JJ Electronic E88CC valves\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cdiv\u003eThe tube buffer uses four JJ Electronic E88CC tubes fed by a ±28V high-voltage supply. JJ tubes are steady performers with a long service life, and here they bring a rounded, organic character to the signal. Edges soften. Vocals pick up a little more texture. If you like your music with a touch of warmth, the tubes handle that work gracefully.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\n \u003cstrong\u003eLED-lit mechanical VU meters\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cdiv\u003eThe dual VU meters add a subtle sense of motion to your desk. They’re true mechanical meters powered by a dedicated IC, not a digital animation, so they move with a tactile kind of honesty. The warm backlight settles into the background and sets the tone for late evening listening.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\u003cstrong\u003eLow-noise linear power supply\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cdiv\u003eA 46W toroidal transformer provides clean, stable power with low ripple and low magnetic leakage. That means less noise, better channel separation, and more consistent performance from both the DAC and tube stages. The measured results back it up—≥114dB SNR and a ≤7uV noise floor.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\n \u003cstrong\u003eVintage-leaning design with solid thermals\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cdiv\u003eThe chassis follows FIIO’s squared, minimal desktop aesthetic, paired with a grille-pattern top plate that vents heat efficiently. The tubes stay comfortable, the internals stay stable, and you can settle into long listening without worrying about thermals.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\n \u003cstrong\u003eNOS and OS modes\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cdiv\u003eTwo decoding modes let you shape the character of the sound. NOS mode keeps the original sample rate intact for a relaxed, effortless presentation. OS mode upsamples to 384kHz for a slightly more defined edge. It’s an easy way to fine-tune the feel of the music.\u003cbr\u003e\n \u003c\/div\u003e\n \u003ch2\u003e\n \u003cstrong\u003eUAC1.0 and UAC2.0 compatibility\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cdiv\u003eA simple lever switches between UAC1.0 and UAC2.0, which keeps the WARMER R2R friendly with consoles, computers, and mobile devices. No drivers needed. Just plug in the source you want and start playing.\u003c\/div\u003e\n \u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eFully-differential 24-bit R2R resistor-array DAC\u003c\/li\u003e\n \u003cli\u003eFour JJ Electronic E88CC tubes in the buffer stage\u003c\/li\u003e\n \u003cli\u003eUSB, optical, and coaxial digital inputs\u003c\/li\u003e\n \u003cli\u003eRCA and XLR line outputs with simultaneous output capability\u003c\/li\u003e\n \u003cli\u003eLED-backlit mechanical dual VU meters\u003c\/li\u003e\n \u003cli\u003e46W low-noise toroidal linear power supply\u003c\/li\u003e\n \u003cli\u003eNOS and OS decoding modes\u003c\/li\u003e\n \u003cli\u003eUAC1.0\/2.0 support for wide device compatibility\u003c\/li\u003e\n \u003cli\u003eVintage-inspired chassis with effective heat dissipation\u003c\/li\u003e\n \u003cli\u003eSupports PCM up to 384kHz\/32bit and DSD256\u003c\/li\u003e\n \u003cli\u003eColor options: black or silver\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eColor: Black or silver\u003c\/li\u003e\n \u003cli\u003eDimensions: 8.8 x 8.4 x 2.6in (223.5 x 213 x 66.8mm, incl. feet)\u003c\/li\u003e\n \u003cli\u003eWeight: 6.3lbs (2.87kg)\u003c\/li\u003e\n \u003cli\u003eDisplay: Mechanical pointer VU meters\u003c\/li\u003e\n \u003cli\u003eDAC: Fully-differential true 24-bit R2R resistor array\u003c\/li\u003e\n \u003cli\u003eTube stage: JJ Electronic E88CC x4\u003c\/li\u003e\n \u003cli\u003ePower supply: 46W toroidal audio linear transformer\u003c\/li\u003e\n \u003cli\u003eUSB decoding: PCM 384kHz\/32bit, DSD256\u003c\/li\u003e\n \u003cli\u003eCoaxial decoding: PCM 192kHz\/24bit\u003c\/li\u003e\n \u003cli\u003eOptical decoding: PCM 96kHz\/24bit\u003c\/li\u003e\n \u003cli\u003eRCA output: ≥1.8Vrms L+R (1kHz @ 10kΩ)\u003c\/li\u003e\n \u003cli\u003eXLR output: ≥3.8Vrms L+R (1kHz @ 10kΩ)\u003c\/li\u003e\n \u003cli\u003eFrequency response: 20Hz–45kHz, attenuation \u0026lt;2.4dB\u003c\/li\u003e\n \u003cli\u003eSNR: ≥114dB (A-weighted)\u003c\/li\u003e\n \u003cli\u003eNoise floor: ≤7uV (A-weighted)\u003c\/li\u003e\n \u003cli\u003eTHD+N: ≤0.053% (1kHz \/ -7dB @ 10kΩ)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eWARMER R2R\u003c\/li\u003e\n \u003cli\u003eAC power cable\u003c\/li\u003e\n \u003cli\u003eUSB cable\u003c\/li\u003e\n \u003cli\u003eSpare fuse tube\u003c\/li\u003e\n \u003cli\u003eQuick start guide\u003c\/li\u003e\n \u003cli\u003eWarranty card\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"FiiO","offers":[{"title":"Black","offer_id":46866208784559,"sku":"APS-1159-1","price":349.99,"currency_code":"USD","in_stock":true},{"title":"Silver","offer_id":46866208817327,"sku":"APS-1159-2","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/apos-audio-fiio-dac-digital-to-analog-converter-fiio-warmer-desktop-r2r-tube-buffer-and-dac-1207599703_32ad6ce4-0753-4c27-ac61-8cf7640016c3.jpg?v=1777716220","url":"https:\/\/freshized.com\/products\/fiio-warmer-desktop-r2r-tube-buffer-and-dac","provider":"Freshized","version":"1.0","type":"link"}