For chest-thumping movie slam and impact and sheer low frequency performance for the price, the PB-2000 subwoofer destroys larger and more expensive subwoofers, dipping all the way down to 17Hz without sacrificing musicality or speed in transients. The subwoofer features a front-firing 4-inch high-flow port with inner/outer port flares and energizes rooms of all sizes with extreme low frequency output for jaw-droppingly powerful and realistic movie and music audio experiences.