box dimensions NEEDED!!!
Sealed = less bass but much tighter
Ported = More bass, looser
Bandpass = Even more bass but even looser, drones a lot.
Sealed average should be aprox 1.25 cubic feet internal volume. Take in to consideration magnets.
Ported average 1.75 or so
A correct band pass should be same as ported for rear chamber and front as well.
Then port dementions come in to play for tuning and things.
My advise is go to the MFG web page and see what they recomend..

