| Name/Model | K11 R2R |
| Hardware solution | SoC: GD32F303RE, DAC: FIIO-developed R2R DAC, USB decoding: SA9312L, AMP: SGM8262-2*2 |
| Color | Black/Silver/Red/Titanium |
| Volume control | Volume knob |
| Weight | About 420g |
| Dimensions | 147x133x32.3mm (including feet) |
| Oversampling setting | OS/NOS |
| FIIO Control | N/A |
| Knob | Encoder knob (including volume adjusting and menu confirming) |
| USB | Type-C (data transmission) |
| Single-ended line-out | RCA port |
| Digital optical in | Optical port |
| Digital coaxial in | RCA port |
| Digital coaxial out | RCA port (only works in USB mode) |
| Balanced out | Standard 4.4mm port |
| Headphone out | Standard 6.35mm port |
| Power supply | DC 12V/2A |
| Battery capacity | No battery |
