99 Extended Cab Stealth Box build
 

Hey guys!
I need someone whose good at calculating up dimensions and such for sub boxes. I have a 12" Kenwood sub that i want to install behind the drivers seat in my cab. It says in the owners manual that the recommended volume for a sealed enclosure is 1.25 Cubic Feet. I really want to keep as much room back there as i can so i really want the sub box to be something of this nature... http://img.photobucket.com/albums/v2...0Truck/034.jpg http://img.photobucket.com/albums/v2...0Truck/033.jpg Anyone who can help me calculate the dimensions of enclosure please speak up! Thanks!