sub box for 4 12s

[mr.wattz(405)]

by using a box calculator my measurements needed are:

31.5" length

32" width

10.5" height

at 5 cu. ft.

my current box is 32" wide 17 1/4" long and 14 1/2" tall and vented but not sure of the cubic ft. sounds good in my jeep but i want to add on.

its for 4 12s that require 1.25 cu. ft. per sub in a sealed enclosure and 1.5 cu. ft. per sub in a vented.

nothing fancy i have two of them already in a ported box that im happy with but want something a little bit louder so im getting two more.

with the rings around my speakers they cover 12 3/4" and have a mounting depth of 6-11/16"

i really like my subs they are plenty loud but i want two more

i would like something built on to the bottom to raise it another 5"

two subs per chamber with two chambers

two speaker terminals

or should i go vented

anybody who could help would be much appreciated and i might be looking for someone to build it!!

if u can build it let me know how much i am looking at

please help

[brewer_brewer]

your current box is a little less than 4.5 cubic feet.