wel i have spent a good amount of time designing and coming up with measurements and specs. Here is what i have design wise for my 6th order
its going to be a 1:1 ratio 6th aiming for a good flat response so it can be a good daily set up.
Rear Chamber - 20 cubes 176 sq in of port using a 15'' aero that is 15'' long with a 1'' radius round over all around, tuned to 30 hz
Front Chamber - 20 cubes 600 sq in of port tuned to 60hz and the port would be 3.25 long
this will be a rear window blowthrough so the shape of the port is going to be as large as the window in the camper shell. as for subs this has been designed for 4 DC XL 18s but i am going to use Sundown SA 18s as temp subs. i have a drawing in AutoCad and this is most likely how everything is going to stay layout wise.