sub port

Ok so I wanna build a box with multiple ports but when I use this aero port calculator I just give ones answer.. So I know it may be a dumb question but if I want 2 aero ports and the calculator says 27inches is that how long both ports should be? And the calculator does also ask for the...

Yoo i built my box for my Type R 12" a couple of weeks back, and im thinking that the sub should be a bit louder than what it is. i used this box plan and made the box ImageShack® - Online Photo and Video Hosting As you can see in the pic the cutout is placed in the middle of the front peice...