Better Cables,Serpent Subwoofer Cable - High-End, High-Performance, Silver/Copper Hybrid, Low-Capacitance, Premium Sub Cable (RCA Cable) (1 meter) Made in the USA of U.S. wire and imported connectors. Low-loss connection for maximum bass subwoofer frequencies Audiophile-grade RCA plugs. Foam HDPE dielectric insulation. High performance silver-coated, stranded conductor.