FiiO
K11 R2R
interface_dac
$170
Used market: $100*
Specifications
4 of 10 values have a recorded source- Type
- DAC/Amp Combo·
- Bus Powered
- no·
- Max Gain dB
- 0·
- Analog Inputs
- ·
- Analog Outputs
- 6.35mm Headphones, 4.4mm Balanced Headphones, RCA Line Out·
- Digital Inputs
- USB-C, Optical SPDIF, Coaxial SPDIF·
- Min Usb Power W
- 0✓
- Headphone Output
- Max Power mW: 460 · Max Voltage Vrms: 3.87 · At Impedance ohms: 32 · Output Impedance ohms: 1·
- Max Sample Rate kHz
- 384·
- Phantom Power Provided
- no·
Expert Audio Engineering Commentary
Headroom Notes
A discrete R2R ladder rather than a delta-sigma chip, and the distortion figure says so plainly: about 0.025 % at the line output, roughly a hundred times the THD of a 150-dollar delta-sigma DAC. That is the character of the architecture, not a fault, but it means the K11 R2R is chosen for what it sounds like and not for its measurements. All figures are quoted in OS (oversampling) mode; the unit also has a NOS mode for which nothing is published.
* Estimated with the depreciation fallback (~59% retained value). · checked on 8/5/2026