box sizes

hey, i'm noob to the whole car audio scene, so i need some help. i installed 2 15" kicker subs in my car. they came with their own box, but therein lies the problem. since i got them from a friend, they were outside for a while... in the rain. they work just fine, it's just that the box sort of deteriorated. i had to reinforce it with some plywood. but, on to the real question:

what size and style(sealed, ported, etc) of box do i need to get the maximum performance out of my subs. i'm going for loudness more than quality.

thanks in advance.

btw, i did search for this in this forum, but i didn't come up with anything. maybe i just searched for the wrong thing. anyways, any help is greatly appreciated.

what model are the subs?

oh man, i don't know the model of the subs. all i know is that the manufacturer is "kicker" and that they're 15 inchers. as i said, they were in the rain and sun and such, so most of the lettering is worn off.

are they square or round?

they are probably cvr's (just guessing)
go ported if u have room. i wouldn't, but if that is what u want........

does the volume of the box matter? will a bigger box result in a louder sound? that's my biggest dilema.

a bigger box will be more efficient, the max output will be the same, it will just take less power to get there

a ported box will be more efficient yet, and the max output will also increase over sealed.

thanks for the advice man. the subs are pounding the hell out of my car and i love it. i'm just surprised that i'm not getting any rattilng!
anyways, thanks.