My subwoofer after serving the best it could for several years finally gave out.There is very little, VERY little, output when on movies and cd's. I tried putting the gains all the way up, recalibrated with MCACC, and tried every setting for my sub in the menu, no, yes, or plus. All yeilding the same results. But what can I expect, it was only $100, yes $100. My first sub I ever bought. Now I think amps are going to be put on hold until an new sub comes my way, unless anyone can think of anything else.