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The Big 3 Upgrade improves your vehicles charging system, giving all it's electrical equipment the current it needs to perform it's best.

Anyone with an amplified aftermarket car audio system, especially those over 1000 Watts, should seriously consider performing this upgrade. If you've noticed dimming headlights, slow window roll down speeds, or voltage drops it's time to do a Big 3 Upgrade.

Wires to Upgrade / Installation Steps:
1. Alternator charging wire to Battery positive
2. Battery negative to chassis ground wire
3. Engine Block to chassis ground wire

1/0 Gauge wire is recommended as it will provide the lowest resistance and potential current flow, but any size larger than the factory wires will be an improvement.

OFC (Oxygen Free Copper) wire is always recommended over CCA (Copper Clad Aluminum) because of it's superior conductivity and corrosion resistance.

Examine your vehicle before purchasing an Big 3 Upgrade kit to make sure you have all the necessary tools to do that job, and that you buy the correct length of wire.
Keep in mind that some car's batteries are located in the trunk of the vehicle, these will require longer runs of wire.

Installation Tools and Accessories:
http://www.sonicelectronix.com/cat_i3...

More information on the Big 3 Upgrade:
http://knowledge.sonicelectronix.com/...

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Big 3 Upgrade step by step