TOPPING DX1 Desktop DAC and Headphone Amplifier

The DX1 is a small desktop computer that supports USB input, amplifier + line output.
The DX1 is a desktop audio solution for miniaturization or budget constraints, an addition to the D10s and D10 Balanced (the D10 series does not have a built-in amplifier, and the DX1 does not have an interface feature).

Characteristics:

DAC parameters DX1 (USB ln@44.1kHz)
THD+N @1kHz (A-wt)<0.0002%
THD @20-20kHz 90kBW<0.0006%
SNR @1kHz (A-wt):120dB
Dynamic range @1kHz (A-wt):120dB
Frequency response:
20Hz-20kHz (±0.3dB)
20Hz-40kHz (±0.7dB)
Output Level: 2.0Vrms @0dBFS
Noise (A-wt) <2.0uVrms
Channel crosstalk @1kHz: -112dB
Channel balance:0.3 dB
Output impedance:22Ω
DX1 Headphone Amplifier Specifications
THD+N @1kHz (A-wt)
<0.0003% @Output=200mW (32Ω)
<0.0002% @Output=4 5mW (300Ω)
THD @20-20kHz 90kB W
<0.003% @Output=200mW (32Ω)
<0.001% @Output=45mW (300Ω)
SNR @MAX OUT 1kHz (A-wt):118dB
Dynamic range @1kHz (A-wt):118dB
Frequency response
20 Hz - 20 kHz (±0.3 dB)
20Hz-40kHz (±0.7dB)
Output level
2.2Vpp @G=L
11Vpp @G=H
Noise (A-wt)< 1.0uVrms
Channel crosstalk @ 1kHz: -86dB
Gain: -2dB (Vrms/FS) @G=L
12 dB (Vrms/FS) @G=H
Output impedance<0.5Ω
output power
280mW X 2 @32Ω THD+N<0.1%
190mW X 2 @64Ω THD+N<0.1%
51mW X 2 @300Ω THD+N<0.1%
Load impedance>8Ω