It's perfectly safe to plug the amps straight into the wall, especially on non-shared circuits. I prefer that approach to most "power conditioners" that tend to screw up the detail or the dynamics or both. However...
I have discovered that an IsoClean power filter can improve the sound even on a dedicated circuit. They're just filters though, so they don't do regeneration or surge protection. However, given the quality of the power in most of North America these days I wouldn't worry about the really bad stuff too much. Unplug the system during wind or electrical storms and you should be OK.
I have discovered that an IsoClean power filter can improve the sound even on a dedicated circuit. They're just filters though, so they don't do regeneration or surge protection. However, given the quality of the power in most of North America these days I wouldn't worry about the really bad stuff too much. Unplug the system during wind or electrical storms and you should be OK.