Where can I get some good info on building a custom ported sub box? Or a how to on building one for a 15" sub

 

the12volt.com
Its the best. Your box is going to be monsterous if you port it for a 15"
My 15" is in a sealed fiberglass one and it rocks hard!

 

http://web.njit.edu/~cas1383/proj/main/

 

Look into WinISD, its a free program which after you enter the parameters of your sub it will show you how it reacts to different changes in the box. It might look kinda weird and hard to use at first but thats why there is a help file.

 

caraudio.com my one n only place for all my car audio forums

 

I like this one pre-made, but its a little pricey...

 

^how much and where?