Theater Solutions SUB8S enhances your audio system's bass response beyond most speakers' limitations. It pairs with existing speakers to boost stereo TVs, stereo systems, or home theaters. Its 8" high-efficiency, low-frequency driver delivers powerful sound, while the built-in digital drive amplifier ensures efficient power delivery. Connect via line-level input for easy integration with various systems. SUB8S features variable crossover (50Hz-150Hz), gain control for volume adjustment, and a 0-180 degree phase switch for optimal sound blending.