i drive a 90 hatch and i am looking to make a walli could use any help possible for the actual construction of the wall. i have a alpine mrv-1507 amp and 3 kicker comps vr's i don't know if i should run 3 ported or maybe pick up a forth and run 4 free air? can you actually do that? run the subs with no actual sealed box won't they push and pull?

 

Is this for competition or fun?

I would suggest ported since you should definately have the space.

 

definatly comp i had the three in the back sine my main competitor where i live has just put in 4 12'' w6v2 aniversary's i am building a wall

 

Just build it so it will fit

If you want to try 3/4 wave theory or something like that visit the termpro forums. http://www.termpro.com