I previously had a kenwood sub in my car and was debating wether or not to replace it with a Rockford HE. Well I went down to a local store that sells JL's because a friend of mine recommended JL's and I know they are top of the line. I bought myself one 12W3 and installed it and....oh my. these subs are LOUD AS HELL. They hit so hard and so clear. I have the bass control on my stock deck turned up to the middle, and my amp is set to around 60%, and when the volume control is around 70% I feel like my trunk is going to break apart. I dont even want to turn it up louder because my ears begin to hurt. I fell in love with JL. It was such a change from the kenwood sub (700w max, 150 rms), and kenwood seemed 10x worse. If you want quality, hard ass hitting bass, then go with these. You will NOT be dissappointed.