I sold a guy my lanzar dc 12's and he decided to mess with his setup and disconnected the phoenix gold octane amp. When he did that he touched the positive and negative together while having the inline fuse still in place and blew his amp. He also damaged one of the 12's but it still plays at a low volume and then when pushed harder it humms and no music plays through at that point and it doesnt stop till power is turned off. What I want to know is what exactly do you guys think is broke? I figured it might be a damaged voice coil that might be fixable since it plays with low power applied in standard fashion. Your help is much appreciated.