earth ground disconnected or not ?

Detlof,
If you use higher or lower values on fuses compared to what is recommended in a cdplayer,preamp or poweramp does that affect the sound quality ?

Grisslehamn,
You know I never thought about that, besides I wouldn't do that. If too low, the fuses blow, if too high, the units blows. What I have done, is to substitute the stock fuses for those expensive German "gold"-fuses and, sadly, perhaps being tin-eared, I heard no difference whatever.
Cheers,

Grisslehamn,
YOu may want to consider one more option;

Dedicated earth ground for your audio system only. The medical grade outlets offer this feature, where the outlet can be ilsolated from the system or house ground. Depending on where you live in the country, and the age of your house, your house ground may not be that effective to begin with.

This is among the quietest of all the options. One has to be careful, if making the dedicated ground a wet ground, since you'll need to have a wire gauge large enough for your panel.