General Specifications
Name/Model K11 Hardware solution

SoC: GD32F303RE, DAC:CS43198

USB decoding: SA9312L

SPDIF decoding: MS8422N

AMP: SGM8262-2*2
color Black/Silver Volume control Volume knob
Weight About 407g Dimensions 147x133x32.3mm (Including feet)
Gain L/M/H Adaptive impedance PO: 8~150Ω
Driver-free mode (switch mode) Supported BAL: 8~350Ω
Max supported sampling rate 384kHz-32bit/DSD256  Native 16/24/32bit (USB DAC) Sampling rate indication Show on display screen
192kHz-24bit (Coaxial) LOGO indicator light shows as default: Cyan: 48KHz and below/Yellow: 48kHz and above/Green: DSD
96KHz-24bit (Optical) Firmware upgrade Supports upgrade through USB
FiiO Control N/A    
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 output interface standard 4.4mm socket Headphone out Standard 6.35mm port
Power Supply Parameters
Power Supply DC 12V/2A Battery capacity No battery
Audio Parameters
Parts of performance and parameters of Line-out output (RCA)
THD+N & Noise ＜0.00035% (1kHz/-0.3dB@10KΩ) SNR ≥126dB (A-weighted)
Crosstalk ≥120dB Noise floor ＜0.9uV (A-weighted)
Frequency response 20Hz~50kHz: damping＜0.1dB Line output level 1.95Vrms
　 20Hz~20KHz: damping＜0.1dB 　 　
Parts of performance and parameters of headphone output (6.35mm)
Output power L+R≥720mW +720mW (16Ω, THD+N＜1%) Output impedance ＜1.2Ω
L+R≥520mW +520mW (32Ω, THD+N＜1%) Crosstalk ≥71dB
L+R≥60mW+60mW (300Ω, THD+N＜1%) Peak output voltage 12Vp-p
SNR ≥123dB (A-weighted) THD+N & Noise ＜0.00059% (1kHz/-8.1dB@32Ω)
Frequency response 20Hz~50kHz: damping＜0.2dB Noise floor ＜2.8uV (A-weighted)
20Hz~20KHz: damping＜0.1dB 　 　
Parts of performance and parameters of headphone output (4.4mm)
Output power L+R≥570mW+570mW (16Ω, THD+N＜1%) Output impedance ＜2.4Ω
L+R≥1400mW+1400mW (32Ω, THD+N＜1%) Crosstalk ≥106dB
L+R≥250mW+250mW (300Ω, THD+N＜1%) Peak output voltage 24.5Vp-p
SNR ≥123dB (A-weighted) THD+N & Noise ＜0.0010% (1kHz/-14.5dB@32Ω)
Frequency response 20Hz~50kHz: damping＜0.2dB Noise floor ＜4.9uV (A-weighted)
20Hz~20KHz: damping＜0.1dB 　 　

 

 

 

 

 

Frequency Response Curve 1    

 

Test conditions: USB in, -5dB sinusoidal signal, high gain, 20Hz-20kHz, 6.35 headphone out (32Ω load)


Red: Left channel; Blue: Right channel    

Frequency Response Curve 2

 

Test conditions: Coaxial in, -5dB sinusoidal signal, high gain, 20Hz-20kHz, 6.35 headphone out (32Ω load)


Red: Left channel;  Blue: Right channel

Frequency Response Curve 3

 

Test conditions: Optical in, -5dB sinusoidal signal, high gain, 20Hz-20kHz, 6.35 headphone out (32Ω load)


Red: Left channel;  Blue: Right channel

Frequency Response Curve 3

 

Test conditions: Optical in, -14.4dB sinusoidal signal, high gain, 4.4 BAL headphone out (32Ω load)


Red: Left channel;  Blue: Right channel

THD+N Curve 1    

 

Test conditions: USB in, -8.1dB sinusoidal signal, high gain, 6.35 headphone out (32Ω load)


Red: Left channel;  Blue: Right channel

THD+N Curve 2

 

Test conditions: Coaxial in, -5.4dB sinusoidal signal, high gain, 6.35 headphone out (32Ω load)


Red: Left channel;  Blue: Right channel

Amplitude Distortion Curve 1

 

BAL H output4V@32Ω

Amplitude Distortion Curve 2

 

PO H output2V@32Ω