Enjoy enhanced audio accuracy in your sound system with this 8-inch Polk Audio subwoofer. Its high-excursion bump stack motor delivers powerful throw, while Dynamic Balance technology eliminates undesirable resonant frequencies and distortion for crisp sound. This Polk Audio subwoofer is ultra-marine certified, so it’s suitable for use on a boat.Geek Squad® Installation RecommendedVisit your local Best Buy store for more information. | Polk Audio | | MM1 Series 8" Single-Voice-Coil 4-Ohm Subwoofer | Black | Best Buy