well i have some updates
my new box is 7.3 cubes 31 hz i built it in the trunk which was very hard
i also up graded my amp to a brutus 1700
MY TRUNK SPACE
so i got pulled over yesturday because apperetnly he could hear and feel my sub from over 10 car lenghts away with my windows up
i had my head unit on -10 and my bass knob all the way down i think that is stupid he could feel that