I'm going to be running 3 Dc Level 4 12's on a DC 5K in the spring. These are going in a trunk! I can do 6 cubes; however DC recommends 4.5 cubes. I am trying to figure out if subs back port back or subs back port out the side would be best. I really don't want to fire everything into the cabin because I don't want to mess with sealing off the trunk. The seats fold down. Opinions are welcome! I am double baffling, bracing and using fiber glass resin.