If you want proper clean power spend money on a battery backup like those used for computers. Or as others have stated a power plant/regenerator like those sold by PS audio very expsensive.
My Sugden a21 draws a lot of power so that goes straight in the wall, lower-powered devices are on a strip that came from wilko for 3 quid 20 years ago. Power is power THOUGH i find things sound better when not ganged up on power blocks and extensions and it is very noticeable, especially for high-power items
Well if you can hear the difference in a double blind test then you are certainly unique in the human race.