If you are using a powered subwoofer, then you need a subwoofer cable to connect to your receiver/amplifier. Subwoofer cables carry a mono signal from the receiver to the subwoofer and delivers a fuller, more extended bass response using a balanced, solid-core bass conductor. Designed to handle the low frequencies produced by subwoofers, our cables provide deeper and tighter bass than ordinary audio cables, as well as freedom from interference for richer sound.