The Harmon Kardon Sub SB26 Woofer Crossover is a black subwoofer from the Harman Kardon Citation Tower series. It features wireless connectivity, making it easy to set up in any home audio system. This subwoofer is designed to enhance the bass and low-frequency sound, providing a rich and immersive listening experience. Perfect for those looking to upgrade their home audio setup with a high-quality and stylish subwoofer from a trusted brand like Harman Kardon.