If it were that easy, everyone would make their own. Companies put years of R & D into developing these type of things. Theres no way that you will be able to build anything that even comes close to a professional design. Something tells me you already suspect this. If you just want box dimensions, look at some subs with 12' drivers in them and go by that.
what dimensions for a 12 sb cr77 subwoofer?
I have a technics 12� subwoofer with no box I'm going to attempt to build one. I have looked all over for the net for �simple� box dimensions but it's all way over my head -_- if any one will just simply tell me the cubic in. needed for the best quality sound I'd greatly appreciate it :)