I have a modest system in my basement with russurround inceiling speakers, Yamaha RX-V371 receiver and needed a sub to get that extra bass. I was not looking to get anything that would rock the house, but something that is modest so I can get discrete bass, mainly for movies.For music, it accentuated the lows, without any distortion and not overbearing. For movies, I was able to feel the bass in action scenes. It was more than loud enough for my small home theater. I have pushed it some...you will get distortion on loud volumes and this is not an audiophile's subwoofer. However, for an entry level system, which is all that I need, this sub gets the job done.