Alright so im deciding to make a new box for my hdc3 12" aluminum coil. I want it tuned around 34 hz. The box I came up with (going in a 03 rsx type s) is 24x16x16. I was planning on doing a L port, with 43 inches of port (4 wide 14.5 tall). I am using .75 mdf. I want the port facing up blowing on the rear windshield. Idk what way to face the driver probably up. Does this sound right or am I just box illiterate? A guy gave me box specs for 23x13x23 which is 3.9 cubes with 34 inches of port which seems way to big and that small of a port seems like it would be a high tuning? This will be the second box I have built and im just trying to figure out more how to do it.