louder setup

[vw passat]

hi smd

now guys I need help to make a louder setup a box not for daily for those songs with 45hz and up.
can u tell me how much sq in, cu ft and tuning pls?

it's a 15'' subwoofer

thanks guys

[Guest]

which sub.

you've been here more than long enough to know to provide details.

[vw passat]

yes but I don't know if I need to make less port area per foot and tune to 45hz or more port area per foot and tune to 45hz that is confusing me.

for my spl-380d2.

thanks

[vw passat]

bump

[vw passat]

any more help how much port area per foot I need for a loudest setup 40hz+