Frequency Response Curve 1


test conditions: USB IN--PO output,-5dB sinusoidal signal, 20Hz-20kHz(32 Ω load)
Red: left channel; Blue: right channel

Frequency Response Curve 2


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

red: left channel; Blue: right channel

Frequency Response Curve 3


test condition: coaxial or optical fiber input-3.5dB sampling frequency 48KHz

red: left channel; Blue: right channel

frequency response curve4


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

red: left channel; Blue: right channel

General specifications
Name/Model KA3 Color Black
Hardware solution DAC: ES9038Q2M;AMP chip: RT6863D*2 FiiO Control Yes
Weight 17.5g Size 56.3mm x 20.2mm x 12mm
USB port TypeC USB Earphone port 3.5mm
Balanced output port 4.4mm DSD DSD64/128/256/512
Firmware upgrade System firmware and Bluetooth version can be upgraded via USB Samplig rate indication

Blue ≤48kHz

Yellow ＞48kHz

Green ＝DSD
Channel balance

PO: <0.004dB(32Ω/THD+N<1%)

BAL: <0.046dB(32Ω/THD+N<1%)

 Recommended headphone impedance

16~300Ω(PO)

16~300Ω(BAL)
Maximum supported sampling rate 768KHz/32bit    
Power Supply Parameters
Power supply   Battery capacity N/A
Audio parameters
Single-ended line output performance parameters
Output power 120mW (16Ω,THD+N<1%) Output Level 2V(32Ω/THD+N<1%)
130mW (32Ω,THD+N<1%) Crosstalk ≥ 76dB(1Khz,32 Ω load)
14mW (300Ω,THD+N<1%) ≥ 118dB(1Khz, no-load)
7mW (600Ω,THD+N<1%) Output impedance <0.5 Ω (load 32 Ω)
Frequency response 20Hz to 20KHz, amplitude of variation 0.2dB SNR ≥ 122dB(32 Ω A)
20Hz to 50KHz, amplitude of variation -1dB. THD+N <0.0008%
Noise floor ＜1.7uV（dbA）    
Balanced headphone output performance parameters
Output power 120mW (16Ω,THD+N<1%) Output Level 2.7V(32Ω/THD+N<1%)
240mW (32Ω,THD+N<1%) Crosstalk ≥ 106dB(1Khz,32 Ω)
56mW (300Ω,THD+N<1%) ≥ 115dB(1Khz, no-load)
28mW (600Ω,THD+N<1%) Output impedance <0.7 Ω ( 32 Ω)
Frequency response 20Hz to 20KHz, amplitude of variation 0.2dB. Noise floor <2.9uV(dbA)
20Hz to 50KHz,amplitude of variation -1dB. THD+N <0.0010%
SNR ≥ 119dB(32Ω dbA)