The subwoofer cable is designed to transmit low-frequency signals from your audio source (such as an AV receiver or amplifier) to your subwoofer, ensuring that you can enjoy deep, powerful bass in your audio setup. These cables are typically shielded to minimize interference and are available in various lengths to accommodate different room layouts and equipment placements. They feature RCA connectors on both ends, specifically designed to fit into the subwoofer output on your audio equipment and the input on your subwoofer.