I seem to see ample ventilation openings in the cabinet’s back, as well as the doors.
If at all, it would result in some line voltage hum and buzz, but if you can’t hear anything at high volume settings it should not have any negative consequences to be worried about.
If there’s some audible hum, sometimes just rearranging wiring and/or gear fixes that.
Standard USB will work just as well, you may even save money.
I’ve commented on that in another thread already.
Maybe you’re just a little bit overly cautious, as Hifi myths are widespread and may easily cause insecure feelings.