Am just thinking that if the setup is separately grounded (ie what they
do in hospitals for special equipment) that the power would be cleaner
& no need for a conditioner.
Doesn't work that way. Sorry. I know this is what everyone thinks. But it just does not work that way.
The short answer is, if you want to improve your system using a power conditioner there are power conditioners that will indeed improve your sound. Nothing you can do up to and including putting your whole house inside a Faraday cage and running everything off batteries will change this. You can have the cleanest power in the world, add a good conditioner, gets even better. So forget about clean power having anything to do with it.
The noise people talk about by the way, it almost never is anything even remotely close to being audible. Its not even noise in the normal sense of the word. Its just that when you do improve something like with a power cord or conditioner (or fuse), the improvement inevitably sounds as if some noise has been removed. Even though there never was any noise identifiable as such there in the first place.
Like I said, this stuff does not work like people think it does.