A competition-level amplifier's output power and performance depend on the maximum possible input current drawn from the car's power supply — and that depends on the quality of the power and ground wires used to transfer energy from the battery to your amp. Kicker's Warhorse ground cable is built of 100% oxygen-free copper to help your high-power amplifiers attain their maximum outputs with no unwanted heat or power loss due to the resistance of the wire to large current delivery. Suitable for almost any kind of vehicle application, this 20-foot long 1/0-gauge black ground wire features a protective Hyper-Flex™ insulating jacket that resists temperature extremes and exposure to oil and gas.