I have recently moved my system from its original room to a new space. Prior to the move I had my Gryphon Antileon Evo amplifier plugged into my P20. The P20 handled the load with no noticeable negative effects. I thought things sounded a bit better with the big Class A amp plugged ino the P20.
Oddly enough, after the move, using the same power cables into the same zones on the P20 I would now hear a hum from the P20 when I would power up the Amp. If I set the amp to full power the hum would get louder. I have no idea why. Perhaps it was humming before and I missed it but I doubt this quite a bit. So tonight I plugged the Amp into its own 20 amp circuit and the P20 into its own 20 amp circuit. I need to listen now to see if I notice a difference.
Curious though. The hum was at a level that I could hear it between tracks. The total load on the P20 was about 1100 watts with everything at full load.