Can someone give me some dimensions to work with or any advice. I have 1 12" L7 4 ohm with a fosgate prime 120p watt class D amp. I will eventually get a second L7 when i have the funds to upgrade my amp. Ive only built 2 enclosures and they didnt turn out so great and sounded lkke crap. If someone could please help me come up with a design. I would really appreciate it.