I have an F15, which should sound pretty similar to the F12...just more output is all. I can tell you that it is extremely accurate and blends with the speaker flawlessly. It is very good for music, but I also appreciate the accuracy for home theater. I think it is a sub that takes a while to get use to if you are normally used to a lot of distortion. These have very little overhang. I used to read about people talking about hearing double kick drums...now I know what they meant. I have never heard any of the major players, but I'm sure they make goood subs. To be honest though, I don't think I'll ever buy anything other than a Rythmik from now on. I really love the sound. That's not a knock on any other brands...the Rythmik hit the mark for me.