so my and my guys go to a local comp in illinois. were a team so eh..i hit 149.3 db off a single amp and 2 subs (l7's) amp is a mx-5000. im in a LOW class. i mean LOW. street 2 or 3. basically i kill the comp. the guys hit no more then 141. and these guys were all vets and shit. then i go and kill it. my guy was in a bigger one. he has 2 mtx RFL's 15's anda orion amp. his 152.1, the box is huge. its a wall with like 12-18 CF for each sub i forget, but the vent is fuckin foot something side. my box is only 8.5-9 cf for both, vented. man i cant wait for the db drag or meca. im almost positive in meca i will place top 3 in a 500mile radius or more i dunno. but im ahppy i did good. my car is a navi. i usta think the more watts and more subs you got , the louder you are, but its ALLL on the box. another guy my boy went up against ran 20,000 watts and 6 subs and only got 149.4 so this week were making my boys box even larger, im satisfied with mine. until i drop past 3rd im leaving it.