New member with Port questions

[Black F1]

I have an f150 crew cab and im building a flow through center console for my two alpine typr r 12s. My max dimensions are 13.5 wide and 30.25 long till the back seat but it will come up over the middle of the back seat. I wanna keep it around 17-18 inches tall cause it will serve as an armrest too. The subs will most likley be down firing and im gonna do the port in the area over the back seat. However i know absolutly nothing about ports and since it is a somewhat weird shape none of the box calculators are acurate. Any help on the port design/size will be appriciated. Also, how do you post pics on here so i can show a drawing of what im thinking about doing

[dsw422]

What year f150?

[Black F1]

Its a 2004

[dsw422]

Ok.. I'm sure someone will help u..

Here's a thread on how to post pics..

http://www.stevemeadedesigns.com/board/topic/160056-how-to-post-pictures-on-the-forum-photobucket/?fromsearch=1

[Black F1]

My question iz really if a 30.25x18x13.5 box is big enough for 2 12 inch type rs. I can do the port in the part that sticks out over the back seat so it wont really take any volume away from the box.. know what i mean?

[Black F1]

these are some of the designs i thought of

[Black F1]

I used external port because it will stick out into the area over the back seat.. does this look okay?

[Jessica]

port area looks way too small to me. try to get around 50sqin"

[Black F1]

or would a taller longer port for the same requency be better like on thks design?

[Black F1]

In order to get close to 50sq in at 32-33hz my port would have to be 3.5 inches wide.. is that not too big?