FiiO K11 R2R DAC and Headphone Amplifier

FIIO's newly self-developed four-channel fully differential 24bit R2R DAC consists of 2x 48 precision thin-film resistor arrays per channel, totalling 192 resistors with 0.1% tolerance and low temperature drift(30ppm). This configuration delivers a unique and charming sound.

The K11R2R employs a fully differential architecture, resulting in lower noise, with less FFT harmonics and a darker music background compared to typical ones.

The NJW1195A is a 4-channel electronic volume controller. The resistor ladder electronic potentiometer is low distortion and low noise, allowing precise volume adjustment.

3 gain levels+ 3 independent volume curves
The 3 independent gain levels and volume curves allow the K11 R2R to give you a better listening experience with various types of headphones, whether you are using sensitive earphones or harder to drive over-ear headphones.

The capacitors' ultra-low ESR, combined with excellent anti-interference capabilities, allow them to provide a stable and clean power supply and thus achieve high-quality sound.

General Specifications
Hardware solution    
SoC: GD32F303RE, DAC: FIIO-developed R2R DAC, USB decoding: SA9312L, AMP: SGM8262-2*2

Volume control
Volume knob

Weight
420g

Dimensions
147x133x32.3mm (including feet)

Gain
L/M/H

Adaptive impedance
PO: 8~150Ω
BAL: 8~350Ω

Driver-free mode (switch mode)
Supported    

Oversampling setting
OS/NOS

FIIO Control
N/A

Max supported sampling rate
384kHz-32bit/DSD256 (USB DAC)
192kHz-24bit (Coaxial)
96kHz-24bit (Optical)

Buttons and Ports
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
Parameters

Power supply
DC 12V/2A

Battery capacity
No battery