thanks for the reply. I had suspected as much. My intention was to use this amp as an adjunct to a Denon AVR for an Atmos channel until I could afford the amp set up that I really need for my home theater, then repurpose the Fosi. For the the $60 I paid for it, I’m satisfied. I figure that the up-powered supply basically doubles the cost of this amp, so less of a value proposition to my situation.I dont think so, I think the TB10D can not be bridged, just use a more powerful power adapter, Amir tested with the stocked 32V power supply, you can use a 48V power supply.