My sister just got a new car, Mazda 6. its a hatchback so a box will be easy. she has 1 12" idq, I would like to go ported, but i also dont want to put a square box in the back. If i do go ported i would like to tune to 32hz. i also have 2 4"x12" precision port so i could use one or both of those. Any Ideas?