I also had the same problem with the 60hz hum and the Monster Power Conditioner that I used got rid of the hum. I did not want to spend a lot of money and some cheaper power conditioners didn't work. The monster power conditioner did a great job
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