Quick Box Question!

[mxman38]

First off, i dont even know if i have ever introduced myself on this site, i kinda just been a lurker and post here and there. Anyway i have been seeing alotta builds... like the Mini Cooper Wall, and just recently i saw the kid with the S10 and 4 15" BTL's and i thought i really need to just build inside the truck to get my max dimensions. Right now i currently have 2 boxes around 5.4 cubes per box @ 34 hz. I know i really could get the BL's to slam the lows alot louder if i got around 7 cubes per sub. SO with that being said im going to make 1 ported box*walled* and tryn get my max dimensions. I was going to get crazy and fiberglass but im really not the best with just winging it and figuring out port lengths and cubes when its not a regular rectangle. On to my question...

Do you find the Sq. inches for port area before or after all the displacements.

EX.

I have 15 cubes to work with total 45x34.5x20 external dimensions for 2 18" BL's/HDC3's (want to get HDC3's if i sell the BLs tomorrow)

Do i multiply 16(rule of thumb) sq inches x 15 cubes? I was told by FI and audioque to go with 14-16 sq inches of port per cube... Right now i have 70 sq. inches of port per sub in a 5.5 cube box(doesnt hit the lows like i want)

This would come out to be around a total of 200 some odd sq inches of port area for 2 18's.... does that sound right?

heres a vid of my set up.. although uncarpeted and not baffled its different now.

thanks for all the help and input.

[mxman38]

bump, anyone? I wanna buy some birch in the AM :-)

[mxman38]

i came up with this, can someone double check it?

[Beanz]

FUCK you got sum nice flex on their.now i really want to build my box now,