I keep saying it, and the more I say it the less uncomfortable people get with it, so I'll keep saying it. If you're on this forum you can likely afford to buy a new amp if something happens to it. Plug it directly into the wall for best sound. Install whole house surge protection, unplug your amp during lightning storms. You can use a good surge protectors for everything else. --Jerry
PS Audio PowerPlant 12 Review (AC Regenerator)
This is interesting. The testing concludes that the filtering inside of the actual electronics device is what matters and that this PS Audio product actually adds its own noise. Some irony.