Weird noise problems.

[Mouse]

What would cause me to hear noise coming from my main speakers that is very clear version of what my wife is watching in another room, different floor, different electric panel even? It was the Bravo channel.

Here's more details. If you follow the McIntosh Forum you know I'm troubleshooting noise. I have a Panamax which is decent, but it isn't quite to the level silence I'm looking for out of my Mc. I'm troubleshooting with an Evotek Aquarius that a dealer loaned me for a day. I plugged my Amp and Pre to the new Evotek and left everything else in my old Panamax and all the sudden the white noise went away, and it was replaced with very clear low volume of what's playing upstairs. When I moved everything else to the Evotek it went away. I have an Evotek EVO3 Sigmas on order and I'm curious how to solve this issue since I may have to have 2 power conditioners for the entire system.