We use two B1200D subs with RCF tops (also 12") when play live with our band to events with up to 70 people, where the B1200D add very good and clear punch. Though, I agree with other users that when the red overload indicator is off, the bass is not loud enough. And when the indicator shows overload, the bass turns out to be powerful and clean. So, you have to constantly play with overload indicator LED lighting red.