Will I see a big difference in Sound if i use a 3 cubic foot box for the SX15, compared to like 3.5 or 4.0???? I know MO has a 4.0 box for his SX15... I just want to know becuz I am limited by space, and i want to know if a 3.0 cubic foot box will be okay to run the SX15 in, and if it won't sound as good in the 3.0 box.