Ported Enclosures

I have been building boxes for sometime and I notice that a lot of boxes have the same concept but are built a little different. When I build a ported box for two subs I normally direct the air out of the front (depending on the application) of the enclosure with a divider between both chambers. I have seen some enclosures with no divider coming out of the front, just a big hole. Does adding or taking away a divider give off a different sound? I also add one in the middle just to make the box more rigid. I am building two ported boxes for a van. Would it be better to port it in the front like I have been doing or to go another way. I would think that by porting it out the back I wouldn't get gain in bass do to the distance that it would have to travel to reach the front of the van.( gain from the port that is)

Edited July 11, 200718 yr by Loose Cannon