Guys you are really making this complicated. If the ground loop hum is from the cable all you need is a simple inexpensive filter for your cable between the outlet and the box. Isomax makes this and can be found on the web or an electronics store. Using a cheater plug on something you might want to provide surge protection doesn't sound like a good idea to me.
Curing ground loop hum with a power conditioner ?
I am using a cheater plug on my amp to cure a ground loop hum that is caused by my cable tv, I was wonder if adding a monster 5100 power conditioner and running my cable through it would cure my ground loop problem, I would also consider a ps audio 600 if that would be a better solution, any help on this would be apreciated, thanks