I have a 1990 civic hatchback and i trying to figure the best setup for one or maybe 2 twelves and 2 6x9's. The damn thing only came with the two 4 1/2's up front and it's workin. if you hae any sub box pics or ideas I sure could use them thanks.
I had a 88 crx, almost the same setup as you and i had a box with 2 10's that fit just right. I think you will have a hard time with 2 12's. It may be possible though. Any subs will pound in that car as long as you point them towards the window. The sound will bounce off the window and come back toward you. good luck..