Ki is right. There's another device called the Magic Box, that does the exact same thing. It's about the same price as well.
Cable TV hum and related ??'s
My cable TV is causing a hum through my stereo. That is because I output the TV sound to my preamp, so I've got ground loop problems. I know that I could use a 3 prong to 2 prong adaptor, but would that negate the benefits of my after market power cords? Is there another way to remove the hum without disconnecting my cable?