Don't say custom =). What I mean is what's it made out of, etc. I don't know much about car audio, but I've been looking into buying a system for my tour, and I've had an offer for a free construction of a bandpass [ported] box, 2 12" JL Audio W3's [?], AND A 650 watt amp w/ a Kenwood digital head unit, for 400, good deal?