Hey I want to make a custom (bigger) box for my two 15" Kicker L7s. They are DVC 2. I have them running off an orion 2500d amp down to .5 ohm. Right now I have two ported boxes (1 for each sub) that I bought off of eBay. They dont sound so bad but I want something bigger and louder for spl competitions. I was wondering if I should just stick with these boxes for daily use and make a custom box for the L7s with about 10cubic ft tunned to 45 or 50hz for spl and put that box in my car when im going to shows and things? I have a 05 ford expedition but the reason I dont want such a huge box for daily use is because I have split bench seating and if I have to remove the third row I can only carry four people in there and I do carry alot of people usually. Right now I can fold up the third row seats but not all the way back, just enough for people to sit down but not put their seatbelts on. Do you guys think I should do this?