Accroding to AA's website they recommend 2.0 cuft of air space per woofer and the box tuned to 35 hz. So that would mean that i need a 4 cu. ft box tuned to 35 hz, but there lies the problem. The height on my box is restricted to 13" and i can't go any wider the 38". According to one of the calculators i used i would need the box to be about 30" deep. and that won't fit into my trunk. How can i make a ported box for these fit into my trunk? Right now i have them in a 2.8 cu.ft sealed enclosure, but i'm planning on entering a few car shows this summer and i would like to have a nicer install. I was also thinking of doing some fiber glass, but i have been told doing that for the first time is not an easy task. Any help and suggestions are welcome. Also if you have arsenals and they are ported how do you like them? sorry for the long post just trying to get everything out