I got this sub for an intro into the the 12" class, I have an old realistic floor sub that i put this speaker in. the dimensions of the cabinet were good, i took the crossover out and cut away all the excess wires. Once mounted i put it in the back of my 06 focus and started to wire it up. I used Crutchfield's ema225 amp @330 watts max, also used the wire kit from Crutchfield. (The wire kit could of used a few more tie ties, but other than that, it had everything that i needed at a really nice price. Im trusting the spec's that Crutchfield gave me on the amp and speaker--they look like a good balanced match. But when i pulled out the speaker for the first time there was a big flashy sticker that says, 1400 watts max--yikes. However, jensens spec sheet coincides with Crutchfield's. The sound of the speaker is pleasing, it brings a soft rumble of base to the stage that fills my car, I really did not test it for that really loud hard hitting base since the speaker is new for im sure there is a break in period. But i did hear enough to not doubt that when the time comes, this speaker will produce. Also, the pioneer 4100 nex picks up the starting hz of the speaker which i thought was pretty cool, it shows 22hz to start and 125 hz cutoff on the graph.
Update 5.27.2016: Gave this speaker time to break in and then tested it hard. Now, it aint going to hit as hard as my friends 4X12" subs and 3000 watts thats in his Tahoe, but i bet if you used four of these Jensens and 3000 watts it would sound as good if not better. With his kickers thats all you hear, boom boom boom- no music really. This jensen and the ema 225 amp plus the polk tweeters and stock sony speakers sound really great,, I mean really nice, when the base comes it sounds really good, plenty enough to vibrate your ear lobes and hits really hard to vibrate the whole car. i think a lot of that comes from the low starting 22 hz. Like earlier, my friends hits hard, mine does too but i get a lot more bass vibration than he does. So, my opinion is, if you have a small car with minimum room and are looking for some really nice big bass sound you cant go wrong with this Jensen 12 incher. Plus, as a bonus, with Crutchfield's guidance and tech support i pretty much got a whole system for less money than my friend did for his four subs and two amps installed. (Head unit is a pioneer 4100 nex,)