I currently have a doubleshot from Nolte Audio if you go to their site you can find out about their boxes for the people who dont know...i did an online calculator thing to find out how many cubes my box is...well i got 3.61 cubes in a ported box for both subs...isnt that kinda low for 2 12" L7's? i have a 2002 sentra spec v, the box is kinda big but would it be worth having someone build me another box with more cubes?