i have a DC lvl 4 18" i was thinking of making a 4th order but don"t know much about them.
the max space i have in my truck is about 8 to 8.5 cubes is it possible to fit one in that amount of space?
In your guy's experience dose a 4th order normally get louder or lower then a ported box
my current box is 6 cubes tuned to 32 according to the RE calculator but i think its off some