Quote:
Originally posted by BloggingITGuy:
I'm using balanced cables to go between the prepro and the amp.

Doesn't this theoretically protect me from power issues coming from the inputs?

We'll see what happens when I get the DC filter they are sending me.
The XLR should help against ground loops, but this is different than DC on AC. Since electric companies don't worry about the quality of the electricity you can have this problem. It is also less obvious since most electronics like computers, etc... use a switching power supply that doesn't care about that issue.

Analog power supplies can have an issue with it though. I've seen the scope view of DC spikes on a AC power line, and I've heard about it being fixed by a basic capacitor filter box.