help with box design and subwoofer

[jchorn11]

so ive been watching the forums for awhile and have finally decided to try and build my own box. Im looking at putting 4 SA-8s in my jeep cherokee. Ive designed the box how I like it, and I think it will work, just looking for some opinions as this is my first build and dont want to screw it up too much.

heres what it looks like on torres box tuning calculator:

and heres a quick sketch of what Im thinking of in google sketchup (I know its not the greatest but its my first time using sketchup):

let me know what you guys think, Im looking for criticism good or bad

also, if you think there is a better sub that i could get im open to suggestions there as well, and if you have an idea on an amp that would be good for the SA-8s i would appreciate the help

[RAM_Designs]

Does that say 4.32ft^3 net volume? Hard to tell on my phone, but if so that's way too big. I suggest 2.5-3ft^3 if running rated power.

[jchorn11]

Does that say 4.32ft^3 net volume? Hard to tell on my phone, but if so that's way too big. I suggest 2.5-3ft^3 if running rated power.

its 4.12ft^3. but that helps a lot and i have to redesign, i got some of my initial measurements wrong. that helps alot to thanks, ill post a new pic once i figure out what im gonna do now with the different measurements