Frequency Response Curve 1


test conditions: USB IN--BAL output,-5dB sinusoidal signal, 20Hz-20kHz(32 Ω load)

red: left channel; Blue: right channel

Frequency Response Curve 2


test conditions: USB IN--BAL output,-5dB sinusoidal signal, 20Hz-50kHz(32 Ω load)

red: left channel; Blue: right channel

Distortion graph 1

 

test conditions: USB IN--BAL output,-6dB sinusoidal signal, 20Hz-20kHz(32 Ω load)

red: left channel; Blue: right channel

General specifications
Name/Model KA2 color Classic Black
hardware DAC: CS43131*2 FiiO Control support
weight About 12.3g size

fuselage: about 40mm x 15mm x 12mm.

Line length: 70mm
Audio input interface Type-C Cable or Lightning Headset output interface 4.4mm socket
firmware upgrade The system firmware can be upgraded through USB sample rate indication

blue: below 48kHz

yellow: above 48kHz

Green: DSD
channel balance

<0.02dB(32Ω/THD+N<1%)

 impedance adaptation

16 to 300 Ω
The highest supported sampling rate 384KHz/32bit Support DSD DSD64/128/256
power supply parameters
power supply battery capacity
Audio parameters
Headset Output Part Performance Parameters (4.4mm)
output power 112mW (16Ω,THD+N<1%) output amplitude 2.2V(32Ω/THD+N<1%)
153mW (32Ω,THD+N<1%) channel separation ≥ 91dB(1Khz,32 Ω load)
54mW (300Ω,THD+N<1%)
27mW(600Ω,THD+N<1%) output impedance <0.5 Ω (load 32 Ω)
frequency response 20Hz to 20KHz, the curve amplitude changes by 0.03dB. signal-to-noise ratio ≥ 125dB(32 Ω A)
20Hz to 50KHz, the curve amplitude changes by 0.05dB. ≥ 131.2dB (600 Ω A)
bottom noise <1.1uV(32 Ω-A) distortion plus bottom noise <0.00036%(32 Ω)
<0.00023%(600 Ω)
<1.05uV(600Ω-A) <0.00024%(32 Ω A)
<0.00014%(600 Ω A)

distortion plot 2

test conditions: USB IN--BAL output,-6dB sinusoidal signal, 20Hz-20kHz(32 Ω load-A weighting)

red: left channel; Blue: right channel

distortion graph 3

test conditions: USB IN--BAL output, 0dB sinusoidal signal, 20Hz-20kHz(600 Ω load)

red: left channel; Blue: right channel

distortion graph 6

test conditions: USB IN--BAL output, 0dB sinusoidal signal, 20Hz-20kHz(600 Ω load-A weighting)

red: left channel; Blue: right channel