box will be rougly 7 cubes @ 28hz, and will house 2 - 15'' RL-p's.

should i run 2 - 6''s aero's, or 1 - 8'' aero?

Depends if you have the room to spare for the 8" or not.

8" = ~50 sq. in. of surface area.

2-6" = ~56 sq. in. of surface area.

Also, add another inch to the length of an aero port to compensate for the opening.

Here is a good read:

http://www.soundsolutionsaudio.com/forum/i...opic=2978&st=15

i think i decided on the 2 - 6''ers.