I have a DD 9512 for sale or trade. The dust cap has been glued to secure it and there are 2 tears in the surround that have been fixed. Neither of these repairs have affected its performance. This thing slams. Selling because my electrical system cannot handle a 1ohm load. I need a sub or subs that can give me a 2ohm load. The sub has dual 2ohm coils. I have a custom box for the sub available as well. Make an offer.