The Logitech Z-5500 THX 5.1 Digital Speaker System Subwoofer is a high-quality speaker system designed for enhancing your audio experience. With its THX surround sound format, this wired subwoofer from Logitech delivers powerful and immersive sound quality. The model S-0115A offers a convenient and compact design, making it an ideal addition to your computer or desktop setup. Although this listing is for the subwoofer only, it still provides impressive performance and is a valuable component for any audio system.