Hired JM Resources, Inc. in King of Prussia, PA to come in and find reason that house speakers hummed when the plasma monitor was on.
House amplifier was working fine...hum wouldn't have been heard if it wasn't. Tech said he didn't know what the problem was (evidenced by the way he said: "I wish I didn't have to charge you $100 (for the visit), but I have to") and suggested getting a newer surge protector that would cancel "noise". He leaves, and later on in the day we went to turn on the system and the amplifier no longer powers up. That was never the problem in the first place.
Called JM's office and (long story short) they said: "there's no proof that we did anything wrong and we're not responsible and will do nothing to help fix the problem".
Summary: if you want poor service and broken items after their visit, call JM Resources.
If not, stay away from them.