It depends on your "conditioner". If it sounds better plugged into the wall, your conditioner is junk. and many of them are.
I've said here a dozen times, you can't filter noise out of AC. You rectify it and invert it with a quality inverter. Then your invert has to have large amounts of instantaneous current availabe. PS audio was the first and may still be the best. People here that I trust have made me think that the furman reference series has plenty of power to support amp dynamics.
Those with physics degrees from the university of google try to size the power supply to match the AVERAGE power that the amp pulls. and it works great if you don't care for bass or dynamics.
Jerry