differential versus common-mode noise?

Thanks Steve. I recognize and appreciate the value of the units suggested. However they are a much bigger investment than I'm able to make.Your thoughtful consideration of my question is much appreciated. I feel you are an exceptional asset to those of us posting here. Top of mind for me.

Pt - you can find lower cost alternatives. Just do your research.

First thing if you use cable TV or internet is to get a Jensen isolation transformer for the cable.

Steve N.
Empirical Audio