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Have no clue on what's happening, advise greatly appreciated : Sub all of a sudden had garbled playing, worse when fumbling w/ the XLR connector. Then played OK for a few weeks, until it blew a fuse Replaced the fuse and it played OK again for a few weeks Then it wouldn't recognize an input signal and auto power-on failed, except when a high input signal was entered. Finally it won't play at low volumes, has a garbled sound at mid-level volume and kick intermittently at high-volume inputs. No visible physical damage ... any idea's ?