Edit: here are the plans for the racks. HE2 is the problem child.

[Link: imgur.com]


I have a 35,000 sq ft home I am working on. It has 2 racks in it. The first rack everything sounds good. When I shoot audio over to the second rack I am getting very loud humming over the whole system.

It currently goes from the source, to an audio matrix to the balun over cat5 to the balun, then to the amp and out to speakers.

I have tried new baluns, a ground loop isolator, by passing the matrix, and disconnecting the ground to the second rack.

Any other ideas I can try?