Hi I use Volumio with Raspberry PI 4 with external DAC: IFI Nano ISDS or Topping DX7 Pro. Passive volume control and pair of GabrisAmp amplifiers with EL34 in PP, Cabasse Dinghy 221 loudspeakers. Listening is very pleasant and never tiresome. .... the sound is clear ... in the headphones a Fidelio X2HR with your eyes closed you are in the music scene. In my opinion we need to improve the interface and it is the interpretation of the tags ...... the price for the SUPERSTAR version is very high for an open source product. To share the disk you have to give the appropriate administrative privileges and it's not easy if you don't know Linux