I am getting a hum from my powered sub, it has a 3 pronged plug. I read up about it appears to be a ground loop problem from the comcast. I have an adapter that bypasses the ground and the hum went away. I know this is frowned upon but I have it on a separate outlet on a separate surge protector from all other equipment. I am about to order the HumX from ebtechaudio to solve this issue.
2/28/07 at 5:32pm