Many of power conditioners, while clean up the AC, limit current to feed your amp thus make your amp sounds less dynamic. You have toget, at least, the power conditioner that doesn't limit the current. Blue Circle BC85.1 is a very good conditioner and it doesn't limit the current to the amp. Especially, not too expensive.
Conditioners for power amps
Are there any conditioners that are beneficial to sound. I am using Aloia amps at 80 watts each. I have been told the Hydra's will help. One dealer uses Audio Tekne which raises the voltage to 126