I think the amp on my IFI is dead. No sound comes out of the speakers and there's just muffled sound coming out of the subwoofer (low distant sound) probably a pretty good indication that the amp is dead. I was given the IFI's by a relative and think they are still under warranty. I was told to call Tech Support and I did today. They said since I didn't have a receit handy (proof of purchase), my warranty was null. I can understand that, but I asked them how much it would be if I paid for the repairs. They took down my name & Number and said they would give me a call back. I haven't gotten a call back yet, though I'm wondering if they forgot about me already. I guess this issue doesn't come up too often. Anyone else have some input on RMAing IFI's?