I don't have this system, but have read through all of the threads on it with interest. One thread had the name of the engineer in charge of this at Lippert. Here is a copy of that post: "Call Lippert and ask to talk to Bob Tiedge. He invented the system and is far better to deal with than their customer service reps. We spoke to Bob and got fantastic service. He arranged to have all 6 jacks replaced on our new Big Country and now silence is bliss. There is an extensive thread on this somewhere on the forum."