Look at the unloaded MTX Thunderform box, very happy with mine although I had to add 1" feet to it to get the sub high enough to not hit the floor. I loaded it with a 10" CVT and happy with it too.
Oxford White 2013 F-150 STX SuperCab with 5.0
Your 2016 Big Bend Open Road Race 105 MPH class champion.
104.989 average over 118 miles.