I had a problem with the digital input on mine. I only used it about 10 times or so. Now, the digital input is all static. I've tried several different things like different cables, different sources, etc, and the problem is definitely the coax jack on the MT. The analog inputs appear to still work fine. I don't know what the problem is and I don't plan to research it either, as this issue made me decide to make the jump to an R-4, so I have no need for the MT anymore. It worked fine for the 10 times I used it before it crapped out.