I have been reading through the forum and it's archives and seen quite a bit about people wanting to use car audio subwoofers for a DIY subwoofer. I am interested in this because I work for a company that allows me access to just about every major and small brand of car audio equipment at wholesale amounts. I was wondering if they would work well in this situation as long as the enclosure was designed with a home theater setup in mind. If so can anyone point me towards any good box building programs, preferably free. If possible i would use a car audio woofer because of the enormous savings it would afford me. It would be replacing a paradigm ps1200. From your experience would I be cheating myself?