LZYCO Subwoofer Cable with Gold Plated RCA to RCA Premium heavy-metal castings Connectors (Black 20FT) Subwoofer Audio cable is constructed with premium quality Metal Connectors; Gold plated RCA Connectors Designed for use with high end subwoofer speaker system, high performance cables deliver full range bass, Oxygen-free copper provide maximum's conductivity and durability 25cm Velcro Cable Ties for Cable Management All LZYCO products backed by Lifetime warranty, lifetime technical support.