Why not use a power conditoner


I understand the convenience of using a separate ISO breaker box and the ISO Torrid Transformers they use, but do you not get the same benefits using a high quality power conditioner such as MIT Z isolator or the equivalent.
Do they incorporate the same torrid transformer principles only on a smaller scale.
I use the MIT Z-Isolator the transformer is large and it only covers two outlets.
Does it matter where you attempt to filter the power.

Which brings me to my 2nd question:
I as quite a few other people have a ground loop problem even if I just turn on my Mono blocks with no other equipment turned on I have a hum/buzz (Less if I used the switched outlet on the MIT Z but still there).
I even disconnected the IC to the pre-amp, same hum.
Why am I getting this hum even though nothing else is connected.
How does one achieve this elusive silent background.
(My Monos are Manley Snappers, The Power cords from the Z-Isolator to the Monos are MIT Z- Cord II's and Signal Cable for the power to the Z-Isolator)

Thanks
punkuk
I have just finished searching the web for a solution to the noise from the Snappers and read "You should use the same outlet for all your audio equipment";
So I used a Trice Power block to route power to all my components from one outlet (This is not a dedicated outlet)
I then plugged my Z-Isolator into one of the Trice outlets and powered one Monoblock via the switched filtered outlet on the Z-Isolator and the other on the un-switched non filtered outlet.
The Switched (Filtered) Monoblock has a buzz I guess this is a 60Hz mains buzz the unswitched has the same buzz and a ground hum.
The level was the same as running them from a different outlet (Same Circuit)

Conclusion:
It did not work back to the drawing board
Have you found the cause of the amplifier hum ? If so what was done to correct it?
Don't have an answer however I do share the same problem. Just added an amp into the rig and now I have a slight hum/buzz from spkrs. I messed w/ it for hours finally having it down to just the amp and spkr wires connected to spkrs and still hum/buzz. No signal whatsoever going to/through amp as it had no ic's connected from recv'r(pre/pro). It is not audible from more than a foot or so away but bugs me just the same. Does not change w/ volume increase when connected to other sources. Amp works and sounds great on all channels(ss 7ch amp).

Is it ok to continue to operate and how would I know when it is not?