[Radioactive]

Glad it's you and not me. I can hear my wife now. "Why did you have to go and mess with it". "It worked fine before".

It looks as if you installed new low gauge power and ground wire. I still would try a cheap (Radio Shack) RF choke on the power wire. Maybe at the amp side and the power source side. You might run a ground from the amp cases (not using the black connectors) to your grounding point. How about covering your amps in heavy duty aluminum foil. Can also be shaped for UFO invasions when you're on the road! If all else fails, how about a separate kill switch for the remote power.