thanks guys for your input. but this is what has been rackin my brain for a few days now even when i did try to figure out the formula. and btw i did go to 12volt and i could not find a calculator that measured 2 different depths.

here is the box i want.

NEW CAR AUDIO FORD RANGER EX CAB CUSTOM 2-10 SUB BOX U - eBay (item 400048477485 end time Jun-06-09 18:35:08 PDT)

they give the measurements but not the cubic feet. now here is a box that is locally but has slightely bigger demensions.

FORD RANGER 10" EXTENDED CAB SUBWOOFER SUB SPEAKER BOX - eBay (item 270395359931 end time Jun-21-09 08:27:52 PDT)

now on this box the demensions are slightly smaller and it comes out to 1.26 cubic feet per chamber. the other box has smaller demensions and yet i still keep on coming with bigger footage than the larger one and so are you guys. so how the hell is this happening?!?!? how can a box that is smaller have more cubic footage using the equation you guys give me?!?! lol

in a sealed box my subs recommend .85 cubic feet so i was trying to get as close to that as possible just not under.

 

prefab boxes are 'ok' but if you want the best sound go to a local stereo shop and have them ake you a box specific to your subs. there they can tune it to you specs like sealed,ported. made for rock musuc,rap, power the amp puts out also matters.

and its sometimes cheaper to have one made. dont go to circuit shity,best buy or some big name lke that. its the smaller shops that really know how to make boxes.

the shop i got to here has a software that helps design the box to your needs

 

or one of us (like me ) who builds boxs to specs for a fraction of what a shop charges.

 

Rockford has a boxwizard on their website. Go there, enter the internal or external dimensions and what thickness MDF you're using and it will calculate it all for you. for all of us non-mathmetitians

 

where would you find the calc's if you didnt wanna use a boxwizard...