Hey guys i just got a new car a 2007 forester xt. i use to have a 2008 jeep wrangler unlimited before with 2 re sx 18s with level 4 recones in it off a crappy hifonics bxi 2608d and 2 hc 1800's. i hit 149.7 in the kick at 47 hz with that. In my forester i want to do 2 fi sp4 15's with a cresendo bc5500 a dc 270xp alt and 4 hc 1800's in the back. i want to do interchangle ports on my new box one for spl and one for daily. i have never build a box like that before and i was wondering how you do it and if its hard.