I grew up with Rockfords and MTXs and have been without an aftermarket subwoofer in my car for about 15 years. Did some comparisons between the Alpine, Panasonic, Kicker, and Kenwood 10's and 12's. This 12" Kenwood sounded as good if not better than the sub twice and much. I have it hooked up to a kicker amp 150rms @ 4ohms and it hits harder than I need. I actually have the gain set at the half-way point and keep my Kenwood head unit subwoofer setting at -15 most of the time and turn it up to -5 when I listen to heavy bass songs. Basically what I'm saying is, if you are just looking for a good sub that won't break the bank but will still shake the windows of the houses as you go down the street, this is it.