German site Lite-Magazin give LUMIN their 1+ Oberklasse award.
During the review Roman Maier states:
The App could hardly be easier or faster
Lumin follows the song absolutely effortlessly - and into the deepest tonal realms
M1 shows itself to be exceptionally well-balanced
Lumin actually replaces a complete hi-fi setup. The M1 combines streamer, converter, network player and amplifier, all for a fair total price