Here is what I was talking about earlier when I was talking about the DB series subs.
http://www.crutchfield.com/S-wq5KLgT...07DB2122&g=510
With that box, those DB's will sound real good. I have heard the DB's without that box and with that box on the exact same amp and that box makes the subs sound a hell of a lot better. I just suggest to get the subs and box deal. And that is if you want to stick with the DB series. I personally have the MOMO series, and those sound great. Just tell me how it works out for ya.