ported box for my crap sub

i have an audiobahn flame Q (12). yes i know its trash but thats all i have right now. so im going to make a ported box and im wondering what type of port it should have. a traditional tube (it calls for two 4" x 12" ports), Or a slotted port? But what can I use for the port? Do audio shops have a long port like that? the box is supposed to be 3.2 cubes so i drew one up thats 20dx13hx30w external with 3/4" MDF. (it has to fit in a narrow place thats why its only 13" high) im not going for total perfection, just a decent ported box that will give me some lows. Oh btw i have about 950watts going to it.

http://www.accelerator-pedal.com/ported-box.asp

you can kiss my ass later. i probably just saved you an hour worth of mental thought (or 10 bucks for somebody else to design you one).

ive built a couple boxes from that site and theyre awesome. plenty of port area always and very easy to follow instructions.

tune to liek 35-40 hz depending on tastes.(assuming you listen to rap or hard rock) or if youre after more SQ get closer to 30. tune lower for better lows but audiobahns kinda suck when it comes to LFE so dont tru and tune for low notes when there arent any there ;)

thanks. ill give it a try.

i jsut played arond on there, and what toook me like 3 hours to plan it came up with in about 5 minutes, and it gives you the peiece you need to cut.

yeah im just finishing one. should sound pretty good.