The FiiO K13 R2R is a desktop DAC and headphone amplifier built on FiiO's own fully differential 24-bit R2R resistor-ladder DAC, rated at 2,400mW per channel into 32Ω from its 4.4mm balanced jack. It suits a fixed desk that takes a computer over USB-C, a TV over optical or coaxial, and a phone over LDAC Bluetooth.
Who the FiiO K13 R2R is for
Multi-source desks: Two USB-C inputs, optical, coaxial and Bluetooth 5.4 (LDAC, AAC, SBC) let a computer, TV and phone share one box.
Full-size and planar headphones: FiiO rates the 4.4mm balanced jack at 2,400mW per channel into 32Ω and 600mW into 300Ω, with three gain levels.
Powered speakers or a power amp: Rear XLR and RCA outputs run as a volume-controlled preamp (PRE) or fixed line out (LO), switchable from the IR remote.
R2R-curious listeners: NOS mode feeds the resistor ladder at the file's native rate, while OS mode upsamples PCM to 384kHz first, so you can hear both.
EQ users: A 10-band parametric EQ works in every input mode and is set in the FiiO Control app or FiiO's web tool.
Skip it if: you need an analog input or a 4-pin XLR headphone jack: every input is digital, the headphone jacks are 6.35mm and 4.4mm, and the XLR sockets are line outputs.
Output power (6.35mm): ≥1,220mW + 1,220mW @ 32Ω (high gain)
Inputs: 2× USB-C, optical, coaxial, Bluetooth 5.4 (LDAC, AAC, SBC)
Input formats: USB up to 384kHz/32-bit and native DSD256 (XMOS XU316); optical and coaxial up to 192kHz/24-bit
Line outputs: XLR (5.3Vrms) and RCA (2.6Vrms), PRE or LO mode
EQ: 10-band parametric EQ
Power supply: Built-in 30W AC supply or 12V DC input
Size and weight: About 210 × 188 × 42mm (including feet); about 980g
Genuine stock, 1-year warranty.
FiiO K13 R2R vs similar options
vs HIFIMAN EF400: Also R2R, adding 3.5mm and 4-pin XLR headphone jacks and HIFIMAN's 4.4W-per-channel maximum rating, but USB is its only input; pick the K13 R2R for optical, coaxial or LDAC Bluetooth sources.
vs SMSL DO400: Uses an ES9039MSPRO chip instead of an R2R ladder and decodes PCM up to 768kHz and DSD512, but costs more; pick the K13 R2R if you want R2R conversion with NOS/OS modes.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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