Topping DX3 Pro+ Desktop DAC & Headphone Amplifier

Product Highlights:

Four output modes: Headphone Amp, Headphone Amp+Line out, DAC, and Pre-amplifier.
QCC5125 chipset, supports LDACIAAC/SBCIAPTXIAPTX LL/APTX HD protocol
2nd generation 8 core XMOS XU208, USB input supports up to PCM32bit768kHz and DSD512 native
Optimized NFCA circuit, with ultra low noise and distortion
32ohm load: 1800mW x2 | 300ohm load: 250mW x2
Two gain settings, +6dB Lo Gain | +19dB Hi Gain

Specs

Bluetooth 5.0: Qualcomm’s QCC5125 Chip
Decoding Chip: ES9038Q2M
USB In

PCM: 44.1kHz-768kHz / 16bit-32bit
DSD (Native): DSD64-DSD512
DSD (DoP): DSD64-DSD256

COAX / OPT in

PCM: 44.1kHz-192kHz / 16bit-24bit
DSD (Native): Not Supported
DSD (DoP): DSD64

Bluetooth In

PCM: AAX, SBC, aptX, aptX LL, aptX HD, LDAC
DSD (Native): Not Supported
DSD (DoP): Not Supported

THD+N @1kHz (A-wt): <0.00015%
THD @20-200kHz (90kBW): <0.00020%
SNR: 122dB
DNR: 122dB
Frequency response 

20Hz-20kHz (±0.3dB)
20Hz-40kHz (±0.7dB)

Output level: 2.1Vrms @0dBFS
Noise (A-wt): <1.8uVrms
Channel crosstalk @1kHz: -137dB
Channel balance: 0.3dB
Output impedance: 20Ω

DX3 Pro+ Headphone Amplifier Specs

THD+N @1kHz (A-wt)

<0.00015% @Output=1500mW (32Ω)
<0.00013% @Output=160mW (300Ω)

THD @20-200kHz (90kBW)

<0.0005% @Output=1500mW (32Ω)
<0.0005% @Output=160mW (300Ω)

SNR: 120dB
DNR: 120dB
Frequency response 

20Hz-20kHz (±0.3dB)
20Hz-40kHz (±0.7dB)

Output level

5.5Vpp @G=L
21.5Vpp @G=H

Noise (A-wt) 

<2.1uVrms @G=L
<7.0uVrms @G=H

Channel crosstalk @1kHz: -90dB
Gain

6dB (Vrms/FS) @G=L
19dB (Vrms/FS) @G=H

Output impedance: <0.1Ω
Output power

1800mW x2 @32Ω THD+N <0.1%
900mW x2 @64Ω THD+N <0.1% 
250mW x2 @300Ω THD+N <0.1%

Adapter impedance: >8Ω 
Dimensions: 6.5” x 4.7” x 1.5” (16.5 x 12 x 4 cm)

What’s included

DX3 Pro+
DC 15V / 1 A Power Adapter
Remote Control
Bluetooth Antenna
USB Cable
User manual
Warranty card