To be honest, I have two of these that a freind of mine gave me, in a completely sealed enclosure. Head unit where you change the radio stations pushes 220 Watts, and the amp is a SMALL 2 channel, 200 watt MAX. I can turn these things up to level 14 out of a total volume levals of 46, when playing a rap song done by Lil Jon..and holy crap...they start messing with your head...I can feel the bass in the back fo my seat..its like a back message! The bass also messes with your nose even..it makes it rather hard to breath. If you want some serious thump for some low bucks then look no further. Oh..one more thing. As I mentioned, I got my 2 JLs from a freind of mine. befor I got them, he had these monsters POWER MOUNTED, with the magnet on the outside of box. About 3..give or take..minutes later..his rear bumper started to disconnect its self from the mounts, his right, rear passenger window cracked and his sun-visores acted like they were about to break, due to how much bass was flowing through the car! You don't need no 1,000 watts to make a slammin' system. Pair this...or THESE subs with a good amp, wireing kit, and head unit..and show up all these guys who dump a grand or so into their system. ~~JL Audio-Serious Sound-Serious Subs-Serious...crap. (couldn't say the other word)~~