for $35 each they aren't bad subwoofers. I'm not into trying to pump so much bass into my car that everything vibrates and falls apart (as would be the case if I had purchased The Jackhammer by MTX) I do tend to turn the volume up more the longer I drive though so whenever I make long trips by myself i usually end up with my stereo blasting at outrageous volumes (It started out as just a way to ensure that I stayed awake but I don't know why I do it know). One thing that always bothered me was that as I would turn up the radio I had to turn down the bass so that my speakers wouldn't be damaged which is what prompted me into getting subwoofers. I don't turn these subs up often but when I do I can assure you that they are definitely powerful. If you are looking for something that can win competitions, this isn't for you. If you just want more bass with your music even one could easily do the job.