This Theater Solutions by Goldwood powered floor down firing subwoofer is newly designed for consumers who demand extra powerful bass for their home theater experience. High quality, lush bass and a full bodied sound at an affordable price. This speaker is perfect playing movies or mega bass rap music. Made with only the highest quality, moisture resistant materials to deliver unsurpassed sound in any listening environment. Sophisticated design and measurement equipment, including computer assisted design software were used to design this powered subwoofer to achieve an optimized balance and interface between components to give better quality performance and longer life. The specially built in cabinet amplifier has high level left/right spring terminal inputs and outputs. The 24dB per octave crossover is continuously variable from 23-150Hz. This powered sub also has a built-in auto shut off. If two minutes goes by and sub does not receive a signal it switches to stand-by mode to conserve power. Volume and crossover frequency dials round out the special features on this super powerful subwoofer. The 15 inch long throw bass down firing woofer has a frequency response of 23-150Hz +/- 2dB. The port design smooth's air flowing in and out of the cabinet, reducing turbulence and port noise. The ports also increase linearity, lowers distortion, reduces 5th order harmonic distortion and provides an increased output as high as 2-3dB. A Mahogany wood finish, cabinet feet, 115 AC cord, included RCA cable and RCA "Y" adapter round out this subwoofers fantastic details.