On one leg or two legs?

Jea48, At work and on the internet EE's are full of reasons why paying a premium for cables, CD players, equipment etc.is not good.

EE's are non believers of anything Audio.

To them all CD players are the same. A bit is a bit.
They play thier Bose systems with thier lamp cord wire and brag about how much money they saved and how stupid it is to be involved in anything more.
I do not even bother to listen to them anymore.

Sorry, I needed to get this out.

Are they all on the same leg in the circuit breaker box?

They are probably on both legs.
Try plugging everything into one outlet and see if the hum goes away...

I have learned alot from this thread.
I found that my 3 dedicated circuits were not only on the 2 legs, but one of the grounds, neutrals were put on opposite sides of thier hot wire.

So, I moved everything to the same side in the breaker panel, including grounds and neutrals.

This question probably has been asked, but I missed the answer but if not, are you running balanced? or single ended?
If single ended have you put in the shorting pins?