i want to start creating a custom box..wondering if anyone could help at all? 1998 sse and either having 2 or 4 12" sony'*...probably wood but possibly fiberglass if easy enough...any help?

make sure you know the dimensions of the box that the sub needs....then build from there. dont use anything thinner than 3/4 mdf. the widest you can go in our trunks is 36" and its a tight squeeze. if you want ANY trunk space, dont get 4 12'*.

not too worried about trunk space...what kind of wood should i use? where can i get the products for cheapest you think?

want something custom that looks good and have the end of the box kind of angled up like you see in like stereowest and different demo. vehicles...probably going to go with 2 12'* only..what all do i need? mostly just what kind of wood is what i'm worried about...

Medium Density Fibeboard as harofreak mentioned is the best. Sealed boxes are the easiest to make as there are many fewer calculations to build one. Fiberglass is great too but if you are a novice, I recommend a few practice runs laying the glass before jumping right into it. It'* not too hard but there is technique to it. Check out www.the12volt.com in the fiberglass & interior forum. There are some guys that do this for a living hovering around in here.

alright, thanks for the help guys

www.caraudioresources.net www.elitecaraudio.com and www.diysubwoofer.org can help you a lot too

if you did two seperate isobaric boxes you could fit four.
2 speakers in an isobaric configuration require half the volume
of just one driver, problem is you won't really get much more output. It'll sound a helluva lot better though.
I'd go with one Brahma 12, or a partsexpress Kove(if theyve got any left.) Or 2 of either if you wanna break crap.
One of either of these subs would probably outpeform 2 of the sonys.
Forgot to mention, if you've never glassed the MDF is the way to go. You can always use the glass for aesthetics.

http://bradgoldring.com/goldringaudio.htm
brad built mine and his, hes great! give him a try!