I have 3 kicker cvr's and It's gonna be in a Big Bronco so i have plenty of space but i wanna build it around my spare tire and angled toward the back window (from what i hear that'll make it a lil louder). SO how would i tune to to 30hz. I really have no idea what that means but from what i read 30hz is good for deep bass and to get some SPL.
How big and long should the ports be?
Here a idea of how i wanna try to build it: