I personnaly would not float ground for equipment designed to be grounded, especially very expensive equipment. Why take a chance? I may take a chance for a cheap CD player, receiver, or anything else you will not cry about later should it go up in smoke.But, tube amps, tube preamps, any SS device worth a few bucks, phono stages, and phono stages are in my opinion not worth experimenting with to test AC issues or theories.
Ciao,
Audioquest4life
Ciao,
Audioquest4life