I researched online about an hour to decide to get this subwoofer. All I can say is what my wife said when I was playing with this new toy and she was in the living room, (the stereo/subby are in a different room next to the living)I turned off the sub and asked her to pay attention, then turned it on, and asked her if she noticed any difference, her response: "it has a richer sound." The rooms in my apartmet are about 15 by 15 ft. This sub works perfect and you can adjust the level of bass you want. Easy to use. Good deal.