i tested my lanzar dc 12 in the same box again but this time i turned my bass boost all the way down and hit max spl at 35hz and 54hz. Then i turned my bass boost almost all the way up and tested again and i hit like 4 db more at 39 hz than at 54hz (net gain of 17 db at 39 hz i think ill have to test again and write this stuff down hehe but assume im right for now). Im running an mtx 81000d and the bass boost is up to 18 db and the boost is centered at 40hz. whats my best approach for all out spl with these subs