A two-core screened interconnect for semi-balanced connection between your A/V amp and an active (i.e., powered) mono subwoofer. Low capacitance and efficient noise rejection maintain signal integrity in long run interconnects, which are often required for subwoofer links. Like all Supra products, the Sublink performs on a par with rivals costing multiples of its very reasonable cost. And like all the products we sell, you"re welcome to try the Sublink in your system for 30 days; if you"re not satisfied for any reason, return it (in mint condition) for a full refund.