http://www.caraudio.com/forum/showpost.php?p=2123520&postcount=11yea looks like particle board.
Nice setup. How do you like them ported? How much power do you have to them? Have you ever metered them? I really want to go ported with mine, but I wouldn't be able to fit them in my trunk.Heh... Nice to see I'm not the only one with 4 comps. http://www.putfile.com/kirk1207