hey all, well i haven't really bothered with upgrading in about 5 months or so and i think it's time. my first upgrade im about to do swap out speakers. but if you check my sig you'll see my system. how can i increase spl without really changing much? im hittin 148.1 on new termpro with it but i wanna get 150. do you'll think swapping sub with maybe new xxx or h2 would help? i would swap out sub and maybe switch amp, but my amp now is in custom rack so probably not that then.