Topping NX4 DSD512 DAC Hi-Res HiFi headphone amplifier

Topping NX4 DSD512 DAC Hi-Res HiFi headphone amplifier.

Specifications:

DSD: PCM768, DSD512.
DSD: native, DOP.
Analog input: 1 x 3.5 mm (shared with analog output).
Analog output: 1 x 3.5 mm (shared with analog input).
Headphone output: 1 x 3.5 mm.
Playback time: approx. 28 hours (headphone amplifier only).
Approx. 7.5 hours (USB DAC + headphone amplifier).
Headphone output: 293 mW.
Distortion: 0.0009% (140 mW).
Gain: 0 dB,8.8 dB.
Noise level: 2.5 uV 6.5 uV.
293 mW x 2 at 32 Ω.
114 mW x 2 at 300 Ω.
Decoding SNR: 119 dB.
16-32 bit 44.1-768 kHZ DSD64-DSD256Dop DSD64-512 (native).
Net weight: approx. 155 g (unit only).
Dimensions: approx. 11 cm x 6.8 cm x 1.4 cm.
Suitable headphone impedance: 16-300 Ω.
Suitable headphone impedance: 16-300 Ω
Color: black.
Used product.
Checked and tested, fully working, practically like new.
No packaging.
No manual.

The set includes:

1 x Topping NX4 DSD512 DAC Hi-Res HiFi headphone amplifier.