JL Audio XD-PCS8-1B Premium 8-AWG 12-Volt Power Connection for Single Amplifier 40-AMP Capacity 8 Gauge Power Amplifier Installation Kit Designed specifically for car audio systems up to 400 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