Oneobgyn, I think there would be a substantial difference among amps and the use of power conditioners. The ARC Ref 600s would likely be too much current draw for any conditioner, but my little 8 watt Reimyo would be no problem, In fact Reimyo makes a conditioner and uses it at shows on the amp.
The SoundApplication you mention is in my experience quite good even with big amps. Perhaps not as big as the ARC 600, but I used a SA with my HK Citation 7.1 amps that drove my subwoofers. It was clearly better into the SA than into the wall.
I now have 2KVA IsoClean transformer which should be able to carry the Citation, but I have sold it and no longer used subs.
The SoundApplication you mention is in my experience quite good even with big amps. Perhaps not as big as the ARC 600, but I used a SA with my HK Citation 7.1 amps that drove my subwoofers. It was clearly better into the SA than into the wall.
I now have 2KVA IsoClean transformer which should be able to carry the Citation, but I have sold it and no longer used subs.