ok the valume of the ouside of the box is 5.94cubes using 1" mdf and minusing sub area and whatever the port is what would u guys figure would be good port dimentions i want tuned low panning on starting later tonight so quick advice would be awesome also have a zx 1000.1 on it at just under 1200 rms car is a civic 98 hb sub is going to be covering most of rear window and facing front of the car on a slight angle