Have the Wiim Pro in an original tube monoblock system.
Some recent and other important changes. Always ran the WiiM Pro with a 5v external LPS. Changed the out from coax to optical into a RME ADI-2 with a glass toslink cable I had available. Surprising result: 20% improvement in quality.
More recently, I’ve been streaming via layered Cisco network switches from a Verizon fiber optical router to the WiiM. Inexpensive and major improvement using fiber optical cable between the Cisco switches with two inexpensive FS.com transceivers, $18. (Awaiting some Finisar ones to try out arriving soon.)
The sound is the most transparent, best separation and most musical with the absolute best I’ve had in any of my home audio applications over two decades. Never imagined streaming (Qobuz) could be so amazing.
Happy listening!