The Whirlwind SK5 Series Speaker Cable is made with two conductor 12GA wire and terminated with an NL4 FC connector on each end. These single line speaker cables are the result of ongoing improvements in wire durability, weight, and size. Made with our specially designed connectors, these cables represent the industry standard for quality. They are available in 10, 25, 50, and 100 ft. lengths. Wiring is to 1+ and 1- pins of the NL4 connector.