hello i had the help of this site for my solo X 12 last year and now im here again asking for help with my 4 12" rockford fosgate subs. they are the old school power HE2 subs.
a seal box of 4 12" connect together is the maximum size width i can go.but i can go a bit higher and a bit deeper.
i want to put all 4 12" in a port box. i do not understand calculation but pictures or measurement is very helpful. this will be going in a chevy impala ss