Posted September 26, 200717 yr This is the graph i got from WinISD volume is 5.4 port is 4* 8 * 11(dont know if thats the right port size or not. I would like it tuned around 32Hz)http://i235.photobucket.com/albums/ee29/mld42/FiBL.jpgThis is a very rough sketch of the box to show where the ports could go. The sub with be mounted inverted for more box volume. I have 2 12's now in a sealed box, but would like something louder, and I have a BL 18 dual 2 that im not using so I am trying to fit it in my truck.http://i235.photobucket.com/albums/ee29/mld42/Blbox.jpgAnd is there any way to extend the port out of the box rather than porting the inside. I havnt seen this done so I dont know if it will work, but I need all the volume I can get.Something like thishttp://i235.photobucket.com/albums/ee29/mld42/Blbox2.jpgLet me know your thoughts