Ive got a single DC lvl 3 12" m2 going in a 2012 nissan altima. Max diminsion are 15 high, 28 long, and 17 deep. trying to get the tuning around 37herts. Any help would be very much appreciated. I've had a hard time trying to figure out the size for a port. Rusty said the sub works best in a 1.5 net enclosure before sub displacement.