Description
For desktop listeners who want the warm, natural tonal character of a resistor-ladder DAC without compromising on modern features, the FiiO K11 R2R delivers a compelling entry into R2R audio. Built around FiiO's self-developed fully differential 24-bit R2R resistor array — 192 precision-matched thin-film resistors per channel with 0.1% tolerance and 30ppm temperature drift — the unit produces a darker music background and smoother harmonic presentation that R2R enthusiasts seek. Dual NOS and OS modes let you choose between authentic original-rate decoding or upsampled clarity at 384kHz, while the NJW1195A electronic volume control with three gain levels and three independent volume curves adapts to any headphone from sensitive IEMs to demanding over-ears. The balanced 4.4mm output pushes up to 1300mW into 32Ω, and the unit handles PCM 384kHz/24-bit and DSD256 across USB-C, optical, and coaxial inputs. A custom VA LCD display and adjustable RGB logo lighting provide at-a-glance monitoring, all housed in a compact anodized aluminum chassis.
Specifications
| DAC Architecture | Self-developed fully differential true 24-bit R2R resistor array (192 precision thin-film resistors, 0.1% tolerance, 30ppm temp drift) |
| USB Decoding | SA9312L – PCM 384kHz/32-bit, DSD256 (Native mode, internally converted to PCM) |
| Oversampling Modes | NOS (Non-Oversampling) / OS (Oversampling, up to 384kHz) |
| Volume Control | NJW1195A 4-channel electronic potentiometer (resistor ladder) |
| Gain Levels | 3 independent levels (L / M / H) with 3 independent volume curves |
| Balanced Output (4.4mm) | ≥1300mW+1300mW @ 32Ω, ≥220mW+220mW @ 300Ω, ≥520mW+520mW @ 16Ω |
| Single-Ended Output (6.35mm) | ≥460mW+460mW @ 32Ω, ≥50mW+50mW @ 300Ω, ≥660mW+660mW @ 16Ω |
| THD+N | ≈0.025% (1kHz/0dB @ 32Ω) |
| SNR | ≥115dB (A-weighted) |
| Dynamic Range | ≥107dB |
| Output Impedance (6.35mm) | <1Ω |
| Output Impedance (4.4mm) | <1.5Ω |
| Frequency Response | 20Hz–50kHz (<1.3dB damping), 20Hz–20kHz (<0.2dB damping) |
| Inputs | USB Type-C (data), Optical, Coaxial (RCA) |
| Outputs | 6.35mm headphone, 4.4mm balanced headphone, RCA line-out, Coaxial out (USB mode only) |
| Display | Custom high-contrast VA LCD (sampling rate, volume, gain, output mode) |
| RGB Lighting | Adjustable RGB FiiO logo (Cyan ≤48kHz, Yellow >48kHz, Green DSD) |
| Power Supply | DC 12V/2A external adapter; internal: 17 LDOs + 2 DC-DC converters |
| Dimensions | 147 × 133 × 32.3mm (including feet) |
| Weight | ~420g |
| Chassis Material | Aluminum alloy, anodized finish |
| Color Options | Black (Obsidian), Silver (Midnight), Red, Titanium |
| Hardware Solution | SoC: GD32F303RE, DAC: FiiO R2R, USB decoding: SA9312L, AMP: SGM8262×2×2 |
