ok.. my sub is starting to burn, just like the one before, and the one before that. It seems to do it with songs with bass in the 60-80 hz range. High range bass. But the really puzzling part is that the other one is perfectly fine. Got 2 amps, 2 speakers, one amp to a speaker. Both amps are digital and all their settings are EXACTLY the same... AND the RCA cables have the same signal. (mono) I have got to know wtf is going on, before i blow another $250 speaker.