Building 2 walls for 4 Atlas 15's

[pacho]

--1st wall will house 2 of the Atlas's and 2nd wall will house all 4
--The wall w/2 Atlas's will have 150 sq.in port area and the dimensions will be 40" wide X 26.5" Height X 26" Depth. I will have 11 cubic feet net for the 2 subs tuned at 33 Hertz

---I was just wondering what is the best type of bracing for walls and this might be a noob question but when ya'll bolted your box down--what type of bolts did you use or screws and did you secure it from underneath the car or from the inside to outside the car??

Thanks for all responses.

[jellyfish420]

here is a great link...http://forum.soundillusions.net/show...highlight=wall

i don't know what happened to the pics, but still PLENTY of info bracing..all thread rod.
securing the wall. you screw it to the 'dance floor'

[pacho]

Alright-thanks man...also does anyone know what size bolts i should use for the wall?