General Specifications
Name/Model KA15 Hardware solution DAC:CS43198*2
Color Midnight black/Sky blue Dimensions About 52*25*11mm
Weight About 21g Adaptive impedance PO: 16~150Ω
Sampling rate indication LCD display screen BAL: 16~300Ω
Max supported sampling rate 768K/32bit Firmware upgrade System firmware can be upgraded via USB
DSD64/128/256 FIIO control Supported
384K/32bit (coaxial) EQ Supported
Buttons and Ports
USB port Type-C USB 3.5mm plug Single-ended/SPDIF output (shared)
Physical button Adjust volume, switch songs 4.4mm plug Balanced output
Toggle switch Desktop mode switch
Audio Parameters
Parts of performance and parameters (3.5mm headphone out)
Output power L+R≥290mW+290mW (16Ω, THD+N<1%, USB IN) Peak output voltage ≥2.4V (32Ω, THD+N<1%)
L+R≥180mW+180mW (32Ω, THD+N<1%, USB IN)
L+R≥19mW+19mW (300Ω, THD+N<1%, USB IN) Output impedance <0.8Ω
Frequency response 20Hz~20kHz, damping≤0.1dB  Crosstalk ≥74dB (1kHz, 32Ω)
20Hz~50kHz, damping≤0.1dB Noise floor 1.7uV"A"
THD+N <0.00045% (0dB, 32Ω) SNR ≥122dB (32Ω, A-weighted)
Parts of performance and parameters (4.4mm headphone out)
Output power L+R≥510mW+510mW (16Ω, THD+N<1%, USB IN) Peak output voltage ≥4.2V (32Ω, THD+N<1%)
L+R≥560mW+560mW (32Ω, THD+N<1%, USB IN)
L+R≥78mW+78mW (300Ω, THD+N<1%, USB IN) Output impedance <1.2Ω
Frequency response 20Hz~20kHz, damping≤0.1dB Crosstalk ≥113dB (1kHz, 32Ω)
20Hz~50kHz, damping≤0.1dB Noise floor 3.2uV"A"
THD+N <0.0004% (-4dB, 32Ω) SNR ≥123dB (32Ω, A-weighted)

Frequency response curve 1

 

Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-20kHz PO output (32Ω load) 
Blue: Left channel; Red: Right channel

Frequency response curve 2

 

Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-50kHz PO output (32Ω load)
Blue: Left channel; Red: Right channel  

Frequency response curve 3

 

Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-20kHz BAL output (32Ω load)
Blue: Left channel; Red: Right channel

THD+N curve 1

 

Test conditions: USB DAC in, 0dB sinusoidal signal, 20Hz-20kHz high gain PO output (32Ω load) 
Blue: Left channel; Red: Right channel

THD+N curve 2

 

Test conditions: USB DAC in, -4dB sinusoidal signal, 20Hz-20kHz high gain BAL output (32Ω load)
Blue: Left channel; Red: Right channel

Amplitude distortion 1

 

Test conditions: USB DAC in, 0dB sinusoidal signal PO output (600Ω)

Frequency response curve 4

 

Test conditions: USB DAC in, -5dB sinusoidal signal, 20Hz-50kHz BAL output (32Ω load)
Blue: Left channel; Red: Right channel

Amplitude distortion 2

 

Test conditions: USB DAC in, 0dB sinusoidal signal BAL output (600Ω)