Need help with port area.... Budget trunk build.

[rcardell]

I'm starting my budget trunk build in my '96 toyota corolla with 2 15" american bass HD's and 2 audiopipe 1500s and have run into trouble with slot port design.# 1. I can not get enough port area with a slot port unless i tune it high. # 2. the bracing in my trunk would be in front of my port at the top about 1 1/2". I want around 33-37hz. Box dimensions 17.5"(h)x41"(w)22"(d), 7.5 cu.ft. I am aiming for 3.0 cu.ft. per sub since I could not figure out recommended cu.ft. with the tech sheet american bass provided. Is that enough? If I multiply the net internal volume by the two subs gives me 96 sq.in. of port area needed. How do I figure that for aero ports. I know Xmax plays a factor but not sure how much. Xmax 30+/-. Is 33hz a reachable goal with my dimensions. My baffle is 39.5"(w) before subtracting for the two subs, I have about 9" in between the subs and 16"(h) for a/multiple ports. Is that enough space for 2 6" ports if needed? I'm lost and am in desperate need of some light shed on my situation. Would I use 2 6",1 6" 2 4" or 3 4" aero ports? This is the only thing thats stoppin my build. I Thought That I could use a square port but ran into the same problem. Not enough port area!!! Any advice is greatly appreciated.I can provide as much info as I can if needed.