How To Install the Big 3 Upgrade | Improve Your Vehicle’s Electrical Charging System | Car Audio

Upgrade your vehicle’s charging system with a Big 3 Upgrade kit available for purchase. This upgrade is especially important for those with an amplified aftermarket car audio system, particularly those over 1000 Watts. The upgrade consists of three main steps: upgrading the alternator charging wire to the battery positive, the battery negative to the chassis ground wire, and the engine block to the chassis ground wire. It is recommended to use 1/0 gauge wire for the upgrade, as it will provide the lowest resistance and potential current flow. Additionally, OFC (Oxygen Free Copper) wire is preferred over CCA (Copper Clad Aluminum) due to its superior conductivity and corrosion resistance. Before purchasing a Big 3 Upgrade kit, be sure to carefully examine your vehicle and purchase the correct length of wire, especially if your car’s battery is located in the trunk. To find out more information about the Big 3 Upgrade, visit Sonic Electronix’s website.