On one leg or two legs?

Jea48,
I will check the power cords tonight.

Al,
Now, that you said it, I do have wireless router next to my desktop computer in the basement, transmitting to my wife's laptop, she's using in the kitchen upstairs. Transmitter is closer to the L channel amp. Also, Comcast cable goes along the same left wall to the desktop in the back of my listening room.
Can't wait to get home tonight and disconnect all that crap, to see what happens.
Will keep you guys posted.

Jea48,
I have been working alot in this weather. hevac ya know.
Houstonreef can put any load on the other side that he wants. I would put another rooms outlets on it myself or light. Make sure there are no dimmers or florecent lights. Do not use kitchen outlets & motor loads are bad. I do not think the projector would be good he will connect the ground and common through the cables. It does not matter the amps if the breaker only has a 120Vac going throu it may not trip correctly.

Houstonreef: Where are your amps to your other equipment?
Do you have tube equipment, phono stage, have you tried to change out some cables. move equipment around a little can stop hum in some instances. Your equipment mite not like each other. Are your power cords 90 deg to your interconnects or 6 inches away as this can cause RF interferance. All a/c create RF. You could just have a bad shield or bad cable.

Maril555. Do interconnect cables connect to both your surround sound processor and your 2 channel. The 2 preamps can have a differant potetial to ground and cause hum. Try disconnecting cables to the SSPre. I have this issue and have not figured out how to stop it other than keeping both systems seperate totally. I got it down to a hum I only here right at the speaker but to me it is too much.

Hevac1,
The two pole 60 amp breaker will trip just fine if there is an overload or short circuit on just the one pole of the breaker. It is designed to do so.

I assume the reason Maril555 paid to have the sub panel installed was to keep his audio branch circuits somewhat isolated from the loads in the main panel.

If you look at the pictures, Maril555 supplied, you will see he had plenty of room in the main panel for the 5 branch circuits.

Your post got me to look at the picture of the main panel again and that reminded me I was going to ask Maril555 why he didn't have the electrician move the two GFI breakers, across from the 2 pole 60 breaker, to another location in the panel.