FiiO K11 R2R: a desktop DAC and headphone amp built on FiiO's own fully differential 24-bit R2R ladder (192 thin-film resistors), with switchable NOS/OS modes and 1,300mW per channel at 32Ω from the 4.4mm balanced jack. Aimed at wired desk setups fed by a computer, TV, console or CD transport.
Who the FiiO K11 R2R is for
Curious about R2R sound: Toggle NOS, which decodes at the file's native sample rate, against OS, which upsamples to 384kHz, and judge by ear which suits each recording.
Planars and full-size headphones: FiiO rates the 4.4mm output at 1,300mW per channel into 32Ω and 220mW into 300Ω, and lists balanced loads from 8 to 350Ω.
Desks with several sources: USB-C, coaxial and optical inputs sit side by side, so a computer, a TV or console and a CD transport can share one pair of headphones.
Powered speakers: A double press of the knob switches the rear RCA output between volume-controlled PRE and fixed LO, so active monitors can run from it too.
IEMs at the desk: Three gain levels with independent volume curves and a 6.35mm output under 1Ω keep sensitive earphones controllable; start on low gain.
Skip it if: you need Bluetooth or a remote control (it has neither), or you want the lowest possible distortion, since FiiO rates its THD+N at about 0.025%.
Output power (4.4mm balanced): ≥1,300mW x 2 @ 32Ω; ≥220mW x 2 @ 300Ω
Output power (6.35mm): ≥460mW x 2 @ 32Ω; ≥50mW x 2 @ 300Ω
Inputs: USB-C, optical, coaxial
Input formats: USB up to 384kHz/32-bit and DSD256 (converted to PCM); coaxial up to 192kHz/24-bit; optical up to 96kHz/24-bit
Outputs: 6.35mm, 4.4mm balanced, RCA line/pre out, coaxial digital out (USB mode only)
Gain: Low / Medium / High
Power supply: External 12V/2A DC adapter
Size and weight: 147 × 133 × 32.3mm; about 420g
Genuine FiiO stock, free shipping on every order.
FiiO K11 R2R vs similar options
vs HIFIMAN EF400: Also R2R, adding 3.5mm and 4-pin XLR headphone jacks and a 4.4W-per-channel maximum rating, but USB is its only input; keep the K11 R2R for optical or coaxial sources.
vs FiiO K11: Same 147 × 133mm chassis but a Cirrus Logic CS43198 chip instead of an R2R ladder, rated under 0.001% THD+N versus about 0.025%; pick the K11 R2R for NOS/OS R2R sound.
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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