JL Audio XD-PCS4-2B 4-AWG 12-Volt Power Connection for Two Amplifier 100-AMP Capacity 4 Gauge Power Amplifier Installation Kit Designed specifically for car audio systems up to 1000 watts Premium power and ground wire provides optimal power transfer Made from 100% oxygen-free copper for a pure uninterrupted transfer of power Terminals and connections are Nickel-plated for excellent power transfer