Just started getting into the car audio thing. Trying to learn as much as possible on the internet, but it's a whole lotta math/formulas (not my best subject). I think I've got it down. Below is a link to a pic of a box I designed in Sketchup. I think it'll work for a 15" Fi BL, but like I said I'm new to this.
http://tinypic.com/r/19tfn6/7
Also, when they refer to port LENGTH, what exactly does that mean? Thanks in advance.