I have had just a couple of average JL 10's before, but I wasn't too serious about subs at that point. I am looking to have something to just straight up pound basss and be loud as hell, in the above 140 db's and hitting 150db would be nice. My buddy has 3 Boston Accoustic 12'' ovals, 555 series i think and they are hitting really hard, and he put up numbers in the upper 140's in a hummber h3. I'd like to be comparable if not beating him.