I have to admit that I am sort of a Polk Audio fan. So I did not hesitate to buy this sub-woofer when I wanted to build my home theater system. A friend of mine actually bought this for his system and I got a chance to hear it before buying it. It would hit all the low end notes that were thrown its way.Pros:AffordableNice Frequency RangeSpeaker Hook-UpsNice Finish on both Black and Cherry VersionsAuto/on/off switchVolume and Frequency Cut Off dials.5 Year WarrantyCons:No LFEEntry LevelFinal Thoughts: The sub-woofer does need a break in period as does any speaker. This sub can really add that needed bass for any home system. Polk Audio quality is amazing and the warranty stands behind that statement.