Thanks i originally designed this box to run off of my 14001 jbl. Fell into a little cash and bought big brother, 24001 jbl. Now waiting on a mike singer 240 amp alt i paid for yesterday to see if those 5.5" ports can handle that wind! If not i might get something different nice 12s or been kickin around gettin an 18. Kinda limited on space in my small car especially with only 38.5 x maybe 20 or so rear facing.