Question to those knowledgeable on audio: My subwoofer sounds distorted when turned up enough. It's only 1 subwoofer of the 2 that are in the system. Is it blown or are the wires inside making that noise? Also I remember accidentally plugging it in the reverse polarity. It seems fine until now. Last year I applied silicone to the subwoofer because the cone was separated and making the same noise. Thanks for any advice.