Just bought this sub from Sonic Electronix. They were great to deal with! I own a JL 13 W7 which is a great sub but I was ready to take it to the next level. RE Audio xxx did just that, and then some! This sub will pound you into submission! Make sure you have it in the optimal sq ft box(4.0 net air space vented) with lots of clean power. I use it in home theater, powered by a Crown XTI 4000(3200 watts). I have a huge sound room, and it will shake the house like there's an earthquake(probably more!)! If you buy this sub it will be the baddest sub you will ever own!