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The power/ground gauge numbers represents the main wire size of the amplifier kit.

Definitions are as follows:

Gauge (wire) - The diameter of a wire. The higher the number, the thinner the wire. Example: 4 gauge wire has more strands than 10 gauge wire.

AWG (American Wire Gauge) - A standard of the dimensional characteristics of wire used to conduct electrical current or signals. AWG is identical to the Brown and Sharpe (B & S) wire gauge.
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Since 1857, The AWG (American Wire Gauge) system has been the standard for measuring the diameter of wire. AWG standard is the measure of bare wire to find true gauge. Companies that do not follow AWG Standards include the thickness of the wire jacket which means the actual wire is not "True to Gauge". For the best performance from your amplifier wiring kit, make sure that the cable complies to the AWG standard.
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The material that the wire is made of. Copper & aluminum are the most commonly used materials. OFC - Oxygen Free Copper is the ideal choice for wire material. Copper is a superior electrical conductor, & does not expand or contract with heat. CCA - Copper-Clad Aluminum is a suitable choice for lower powered or budget applications. The power transfer is not on par with OFC, but this material offers significant savings.
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NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper

1/0 AWG Big 3 Upgrade Kit with 100% OFC Wire for Audio Sytems up to 350 Amps

XBG3PK big
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1/0 AWG Big 3 Upgrade Kit with 100% OFC Wire for Audio Sytems up to 350 Amps

• Upgrade Your Factory Power and Ground Wire
• Perfect for Dealing with Dimming Lights
• Improve the Efficiency of Your Vehicle's Electrical System
• Use for Systems 350A or Less
• Includes All Necessary Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

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Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
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Belva BBG3KT

1/0 AWG Big 3 Upgrade Kit with CCA Wire for Audio Systems up to 250 Amps

BBG3KT big
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1/0 AWG Big 3 Upgrade Kit with CCA Wire for Audio Systems up to 250 Amps

• Upgrade Your Factory Power and Ground Wire
• Perfect for Dealing with Dimming Lights
• Improve the Efficiency of Your Vehicle's Electrical System
• Use for Systems 250A or Less
• Includes All Necessary Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire
• 30% Copper CCA Wire

Save 10% with coupon
shipping truck icon Free shipping in USA. Provide zip for delivery date.

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39
Was $79.99 Details
$59.99

In stock

• Upgrade Your Factory Power and Ground Wire
• Perfect for Dealing with Dimming Lights
• Improve the Efficiency of Your Vehicle's Electrical System
• Use for Systems 250A or Less
• Includes All Necessary Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire
• 30% Copper CCA Wire

BBG3KT small

Item added to your cart.

Price: $59.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
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    FAQ Frequently asked questions in Big 3 Upgrade Kits


    Big 3 Upgrade Kits Frequently Asked Questions (FAQ)
    A Big 3 Upgrade Kit is an aftermarket wiring upgrade that replaces three essential factory power cables in your vehicle: the alternator to battery positive cable, battery negative to chassis ground cable, and engine block to chassis ground cable. The factory cables are often designed to meet basic electrical needs, but they can become limiting when upgrading to a more powerful car audio system. The Big 3 Upgrade Kit consists of larger gauge and higher quality cables, reducing electrical resistance and improving power transfer efficiency. By providing cleaner and more stable power to your car audio components, the upgrade enhances amplifier performance, reduces dimming headlights, and prevents potential voltage drops. For enthusiasts seeking improved audio clarity and bass response, a Big 3 Upgrade Kit is a valuable addition to their car audio system.
    Installing a Big 3 Upgrade Kit can be a moderately complex task, and it requires knowledge of car electrical systems and basic wiring skills. If you have experience with car audio installations, you may be able to do it yourself with proper research and caution. However, for those unfamiliar with car electronics, seeking professional assistance is recommended. Improperly installed cables can lead to electrical issues or damage to the vehicle. Professional installers have the expertise to ensure a safe and secure installation, preventing any risk of electrical hazards. Sonic Electronix offers a range of Big 3 Upgrade Kits and recommends consulting our experts or professional installers to determine the best kit for your vehicle and audio setup.
    Yes, a Big 3 Upgrade can still benefit your car audio system, even if you don't have high-powered amplifiers. While high-powered systems benefit more noticeably from the upgrade, all car audio systems can benefit from improved electrical efficiency. The Big 3 Upgrade reduces electrical resistance in critical power paths, allowing your car audio components to receive cleaner and more stable power. As a result, your audio system will likely experience less distortion, improved dynamic range, and better overall audio clarity. Additionally, a Big 3 Upgrade can prevent dimming headlights or flickering interior lights that may occur during intense bass hits or high-volume playback. For those seeking better audio performance and improved electrical stability, a Big 3 Upgrade is a worthwhile investment.
    When installed correctly, a Big 3 Upgrade should not cause any damage to your vehicle's electrical system. However, improper installation, such as incorrect cable routing or inadequate grounding, can lead to electrical issues. It's crucial to follow the provided instructions or seek professional assistance to ensure a proper and secure installation. Additionally, using the appropriate wire gauge and high-quality cables is essential to avoid electrical hazards or component damage. If you are uncertain about installing the upgrade yourself, it's best to consult with an experienced installer or have it professionally installed. A properly executed Big 3 Upgrade can significantly improve your car audio system's performance and electrical efficiency without causing any harm to your vehicle.
    In most cases, a properly installed Big 3 Upgrade should not void your vehicle's warranty. The upgrade involves replacing factory power cables with larger gauge aftermarket ones, but it does not involve altering or modifying the vehicle's essential components or systems. However, it's essential to check your vehicle's warranty terms and conditions to ensure that upgrading the power cables will not affect your coverage. If you are concerned about warranty implications, you can consult your vehicle manufacturer or dealership for clarification. As an alternative, consider using a ""no-cut"" Big 3 Upgrade kit that requires no modifications to the existing wiring, making it easier to reverse the upgrade if necessary. Ultimately, a well-executed Big 3 Upgrade should improve your car audio system's performance without jeopardizing your vehicle's warranty.

    All About Big 3 Upgrade Kits


    Upgrade the Power and Ground Cable under your hood with the Big Three Upgrade. These kits have everything you need to do a Big Three Upgrade.

    Looking to enhance your car's audio performance and electrical system? Look no further! Sonic Electronix offers a premium selection of Big 3 Upgrade Kits that are specifically designed to optimize your car's electrical power distribution. Don't compromise on the performance of your car audio system; explore our collection of Big 3 Upgrade Kits now and take your audio experience to the next level!

    Big 3 Upgrade Kits - Unleashing Your Car's Full Potential

    A Big 3 Upgrade Kit is a must-have for car audio enthusiasts seeking to maximize their audio system's performance. This upgrade involves replacing three crucial factory wiring connections in your vehicle's electrical system: the alternator's positive power cable, the battery's negative ground cable, and the chassis ground cable. Upgrading these essential connections with premium cables and connectors significantly improves the flow of electrical current, reducing voltage drops and ensuring a more stable power supply to your amplifier and other audio components.

    One of the significant advantages of a Big 3 Upgrade Kit is its ability to improve the efficiency and reliability of your car's electrical system. By minimizing resistance and voltage drops, you'll experience cleaner and more consistent power delivery to your audio equipment, resulting in enhanced sound quality and reduced audio distortion. This upgrade can also lead to improved overall vehicle performance and better fuel efficiency.

    Assistance at Your Fingertips - Sonic Electronix's Expert Support

    At Sonic Electronix, we understand that every car audio setup is unique, and we are dedicated to helping you find the perfect Big 3 Upgrade Kit for your specific vehicle. Our team of car audio experts is readily available to provide personalized assistance and expert advice. Whether you have questions about compatibility, installation, or need guidance on selecting the right kit for your vehicle, our knowledgeable staff is here to help.

    Don't hesitate to call us at 1-502-200-8010, and our friendly customer service representatives will be delighted to assist you in choosing the ideal Big 3 Upgrade Kit to suit your car audio needs.

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