Conclusion: Well I bought a pair of these subs because of JL's reputation. I have a 05 GMC Crew Cab and really wanted to put them behind the rear seat. I've had boxes on the seat and it uses up too much space and makes a crew cab worthless. and i like to use the space under the seat and its just a mess to build a box for there. I also enjoy listening to my music very loud. I ordered a pair of these and hooked them to a Kenwood 1904D Amp and it pushes the pair pretty good.
Summary: JL Audio is the best brand of subwoofers out there. The TW5 offers all the thump with a fraction of the space. I got all my trunk room back with 2 of these in my trunk - depth of the box is only 7 inches. Well worth the money for the amount bass you get from these subs.
Conclusion: I have this sub, it sounds great! Once it gets broke in it will sound a lot better... Also i just bought a second one of these subs and im getting the box built next week by my buddy justin
Conclusion: This woofer is an awesome addition to my system! Between this and a 10W3v3 the low end is completely covered. It handles an Alpine PDX6 amp nicely and I have it tucked under the back seat in my F150 iin a 0.8 cubic foot box where it sits in less that six inches of clearance. I don't think there is a better performing shallow anywhere!! I also think that this would outperform most standard speakers. I highly recommend this speaker!!!