Description
The FiiO K11 is a compact desktop DAC and headphone amplifier built for listeners who want balanced output power and high-resolution decoding on a slim profile. Its Cirrus Logic CS43198 DAC chip and dual SGM8262 amplifiers deliver up to 1400 mW through the 4.4 mm balanced output, driving demanding full-size headphones from an aluminum chassis measuring just 147 × 133 × 32.3 mm. Three independently tuned gain levels with dedicated volume curves match the unit to everything from sensitive in-ear monitors to high-impedance over-ears.
USB Type-C, optical, and coaxial inputs pair with 4.4 mm balanced, 6.35 mm single-ended, and RCA line outputs. The custom high-contrast LCD shows sampling rate, volume, gain, and output mode at a glance, while adjustable RGB logo lighting indicates the active audio format. The multi-function encoder knob handles power, menu navigation, source switching, and independent LO/PO volume memory. Windows 10+, PS5, and Nintendo Switch work without drivers.
Headfonics reviewers describe the K11 as neutral and transparent with a wide soundstage that lets connected headphones reveal their own character. Headfonia praises the sturdy aluminum build and thoughtful rear panel layout, while noting the absence of a remote and Bluetooth as trade-offs that keep the price competitive.
Specifications
| DAC Chip | Cirrus Logic CS43198 |
| USB Decoder | SA9312L |
| SPDIF Decoder | MS8422N |
| Amplifier | SGM8262-2×2 |
| Max Sampling Rate (USB) | 384 kHz / 32-bit PCM, DSD256 Native |
| Max Sampling Rate (Coaxial) | 192 kHz / 24-bit PCM |
| Max Sampling Rate (Optical) | 96 kHz / 24-bit PCM |
| Balanced Output (4.4 mm) @ 32 Ω | ≥ 1400 mW + 1400 mW |
| Balanced Output (4.4 mm) @ 300 Ω | ≥ 250 mW + 250 mW |
| SE Output (6.35 mm) @ 32 Ω | ≥ 520 mW + 520 mW |
| SE Output (6.35 mm) @ 300 Ω | ≥ 60 mW + 60 mW |
| SNR (Headphone Out) | ≥ 123 dB (A-weighted) |
| SNR (RCA Line Out) | ≥ 126 dB (A-weighted) |
| THD+N (6.35 mm @ 32 Ω) | < 0.00059 % |
| THD+N (4.4 mm @ 32 Ω) | < 0.0010 % |
| Output Impedance (SE) | < 1.2 Ω |
| Output Impedance (BAL) | < 2.4 Ω |
| Gain Levels | 3 (L / M / H), each with independent volume curve |
| Inputs | USB Type-C, Optical (TOSLINK), Coaxial (RCA) |
| Outputs | 4.4 mm balanced, 6.35 mm SE, RCA line out, Coaxial digital out (USB mode) |
| Display | Custom high-contrast LCD (sampling rate, volume, gain, output mode) |
| RGB Logo Lighting | Adjustable — Cyan (≤ 48 kHz), Yellow (> 48 kHz), Green (DSD) |
| Driver-Free Mode | Windows 10+, PS5, Nintendo Switch compatible |
| Power Supply | External DC 12 V / 2 A switching adapter + 16+ internal LDO regulators |
| Chassis | Aluminum alloy with silicone anti-slip pad |
| Dimensions | 147 × 133 × 32.3 mm (including feet) |
| Weight | Approximately 407 g |
| Color | Obsidian Black |
