2001 grand Cherokee 2 13w7's hifonics bre2500.1 subs wired series parallel.
Looking to go slot ported, max width 40" max depth 24". I talked with JL tech support, the told me 6 cube total air space with 60" port surface 16.5 long. I can do the calculations to find my height around the parameters they gave me but I figured I'd ask you guys because my goal is really deep impressive to your ear shake the hell out of the car bass. I'm just daily bangin, no compititions. I feel as though I need about 6.25 cubes and a 15" port length, 60" surface. What do you guys think? I'm thinking being tuned around 28 to 30 will make these subs really get impressive to the ear. Any help is appreciated.