I used this and two other speakers as part of a kit for a small karaoke bar setup and i have to say the sound quality is excellent the sound is clear and not too harsh even with people screaming into the microphones!! the sub is ok it does lack umph though! the output is not very loud even at full whack. the power output to the speakers is good though but the power ratio of speakers and sub falls short, this sub could do with more power.