You're right about that! We took our sound system in to Camping World while it was still under warranty because it was making screeching sounds it was not supposed to be making. First we had to talk them into taking just the system instead of our whole RV for the whole time. After a few weeks they said they had sent it in for replacement and it was ready. We picked it up, put it back in, and it had the same problem! (And everyone had verified it was NOT the speakers through other tests.) But by this time we were scheduled to leave the area and couldn't keep pursuing it there, and it was out of warranty by now so we gave up.