ehh. I dun like their stuff. The amps are crap :madfawk: All you need.

www.edesignaudio.com - Kx12 (badass sub, and they are like $85 a piece)
www.ebay.com JBL 300.1 - If your going to seal this sub, you can't go wrong.
Buy some MDF and make a speaker box, or pick one up cheap somewhere. www.speakerhole.com I think they have boxes that would work for the Kx. Good luck