I am new to the site. I have been around spl for a little while and i have some question about my current setup. Right now my system is a memphis 1500d and a 15" kove armageddon z series dual 4. Right now i dont want to seal the trunk off and have the sub firing forward. I am looking for a spl box my problems in that the truck from floor to truck lid is about 16.5-17 inches high. If i build the box big enough for the sub to fire back ill will be blocking alot of the room of for air to more around the box. Could i fire the sub up and port back? I have never seen good #'s from this type of setup. Im up for any suggestions on box configurations. Thanks