Stop fooling around with power cords, balanced connections, line filters, Quantum Electromagnetic Absorbers, or whatever. These guys have the real solution:
http://www.thekcrachannel.com/news/4512146/detail.html
Neighbors of Steve Eddy's, I note.
http://www.thekcrachannel.com/news/4512146/detail.html
Neighbors of Steve Eddy's, I note.