Name: Topping D90 standard non MQA
Receiver: XMOS XU208
DAC: AKM AK4499
Async: yes
Working with Volumio: yes
Tested Versions and Platforms: 2.799 onward
Hardware Mixer on Volumio:
HW Mixer string:
Comments: used with RPI4. No USB noise issues detected with stock USB cable when listening to whisper quiet passages at very high volume settings and ear next to speaker.
The Hardware mixer reduced the volume OK but did not operate the D90 volume. So I assume it worked as a software volume control.
A very well performing DAC.
Buying Link: In europe look for Audiophonics or Hifistudio 79