ok i wasnt being rude and not answering your question just asking one to you cause i was thinking about going there and if they dont teach you something like how different type of boxes work with different setups and speakers then i dont think im interested in going, thats all, and to answer your question, first off are the 6x9's that you are using just a straight woofer 6x9 or are thay a 2 or 3 way 6x9, next i think that if you wanted maximum bass out of them to put them in a box bout 36" long by 10" deep and 8" wide and port each 6x9 using 1- 4" pvc pipe cut to 10" long per 6x9 thats what i was running in a mustang coupe once and they pounded great, i dont know if i had the box built to spec but it seemed to do the trick really well