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  1. Home
  2. Discontinued Car Audio & Electronics
  3. Discontinued Car Audio Installation & Accessories
  4. Discontinued Car Amplifier Installation & Accessories
  5. Discontinued Big 3 Upgrade Kits

Discontinued Big 3 Upgrade Kits

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Power/Ground Wire Size
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.
Power Wire Color
Ground Wire Color
Complies to AWG Standards
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.
Wire Material
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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You are currently viewing discontinued products.

Xscorpion Big 3 Kit (Blue)

Sonic Exclusive Big 3 Upgrade Combo Package (1/0 AWG Flat Wire)

XSCORPION BIG 3 KIT-BLUE big DISCONTINUED
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Xscorpion Big 3 Kit (Blue)

Sonic Exclusive Big 3 Upgrade Combo Package (1/0 AWG Flat Wire)

Big 3 Upgrade Combo Kit • Includes Xscorpion 1/0 Power & Ground Cable • Xscorpion Battery Terminals • Helps Eliminate Dimming Headlights • Stops Drops in Voltage • Improves Vehicles System Charging • Includes Wire & Cable Cutter/Stripper

Big 3 Upgrade Combo Kit • Includes Xscorpion 1/0 Power & Ground Cable • Xscorpion Battery Terminals • Helps Eliminate Dimming Headlights • Stops Drops in Voltage • Improves Vehicles System Charging • Includes Wire & Cable Cutter/Stripper

Belva BBG3KT-OPEN BOX

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

BBG3KT big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Belva BBG3KT-OPEN BOX

1/0 AWG Big 3 Upgrade Kit with CCA Wire for Audio Sytems 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

• 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

XS Power BIG3XP (Open Box)

XP FLEX 1/0 AWG Big 3 Upgrade Kit for Audio Sytems up to 250 Amps

BIG3XP big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

XS Power BIG3XP (Open Box)

XP FLEX 1/0 AWG Big 3 Upgrade Kit for Audio Sytems up to 250 Amps

• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 250A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 250A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

XS Power BIG3XP-OPEN BOX

XP FLEX 1/0 AWG Big 3 Upgrade Kit for Audio Sytems up to 250 Amps

BIG3XP big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

XS Power BIG3XP-OPEN BOX

XP FLEX 1/0 AWG Big 3 Upgrade Kit for Audio Sytems up to 250 Amps

• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 250A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 250A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

Belva BBG3KT OPEN BOX COMPLETE

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

BBG3KT big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Belva BBG3KT OPEN BOX COMPLETE

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

Item has damaged packaging and has been opened
• 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

Item has damaged packaging and has been opened
• 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

XS Power BIG3XP Open Box Complete

XP FLEX 1/0 AWG Big 3 Upgrade Kit for Audio Sytems up to 250 Amps

BIG3XP big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

XS Power BIG3XP Open Box Complete

XP FLEX 1/0 AWG Big 3 Upgrade Kit for Audio Sytems up to 250 Amps

• Item Condition: Open Box complete
• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 250A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

• Item Condition: Open Box complete
• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 250A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper OPEN BOX COMPLETE

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

XBG3PK big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper OPEN BOX COMPLETE

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

Used and opened
• 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

Used and opened
• 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

MechMan Alternators BIG3 OPEN BOX INCOMPLETE

Premium Zero Gauge "Big 3" Cable Upgrade Kit

BIG3 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

MechMan Alternators BIG3 OPEN BOX INCOMPLETE

Premium Zero Gauge "Big 3" Cable Upgrade Kit

Item is missing Beauty box, Is opened and Unused
• Designed for Alternators up to 250 Amps
• Ultra Flexible soft Touch Jacket for Easy Routing
• True 1/0 Gauge Diameter Cable
• Heavy duty Set-Screw Ring Terminals

Item is missing Beauty box, Is opened and Unused
• Designed for Alternators up to 250 Amps
• Ultra Flexible soft Touch Jacket for Easy Routing
• True 1/0 Gauge Diameter Cable
• Heavy duty Set-Screw Ring Terminals

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper OPEN BOX COMPLETE

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

XBG3PK big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper OPEN BOX COMPLETE

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

• Item Condition: Open Box Complete
• 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

• Item Condition: Open Box Complete
• 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

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper OPEN BOX COMPLETE

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

XBG3PK big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper OPEN BOX COMPLETE

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

Item has been opened
• 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

Item has been opened
• 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

Belva BBG3KT (Like New (Open Box))

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

BBG3KT big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Belva BBG3KT (Like New (Open Box))

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

• 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

Belva BBG3KT (Open Box, Great)

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

BBG3KT big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Belva BBG3KT (Open Box, Great)

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

• 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

Belva BBG3KT (Open Box, Good)

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

BBG3KT big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Belva BBG3KT (Open Box, Good)

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

• 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

XS Power BIG3XS Open Box

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

BIG3XS big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

XS Power BIG3XS Open Box

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

• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 350A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

• Use to Upgrade Your Factory Power and Ground Wire
• More Effective Than Capacitors When Experiencing Dimming Lights
• Vehicle's Electrical System Will Run More Efficiently
• Use for Systems 350A or Less
• Comes With All Needed Wiring
• Ring Terminals are Pre-Connected to Power and Ground Wire

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper (Open Box, Great)

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

XBG3PK big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

NVX XBG3PK Big 3 Kit with True 0 Gauge 100% Oxygen-Free Copper (Open Box, Great)

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

1

• 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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    FAQ Frequently asked questions in Discontinued 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.
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