ive got a design here for a some boxes i built for a clio,,, big and bulky though! was doing 148.6db's on a termlab reader with 1000wrms to each sub and flat batteries
if u click on the image to enlarge it, gives u exact box specs, and even gives u the details of what sizes to cut each bit of wood!! brilliant design and i can give u tips on how to improve it slightly too
looks like this
and looks like this in an escort
and like this in a clio with 2
even a couple vids for ya!!
first one with 1 sub
then with 2! (watch the hair)