I live in a second floor NYC apartment. I have two Polk subwoofers hooked up to a pair of Axiom M22's. As of yet I've received no complaints from my neighbors downstairs, but the constant lowering of the volume when a deep bass-boom approaches, coupled with the difficulty of setting the volume low enough to not disturb anyone, yet still high enough to remain audible, has all but convinced me that it's just not possible to fully enjoy a subwoofer while living in apartments. I wonder if anyone else has had this problem, or if anyone has any advice about neighbors, noise, subwoofers, and the like. Thanks.