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

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List price $199.99

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Arrives by Thursday, July 9 to zip 07095

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Bundled Savings with this Product

Add a pair of Large Gauge Cable Crimper and Save 25%

Provide a secure connection for large gauge ring terminals with this easy to use Hammer Style Crimper.







25% OFF

The Install Bay IBHDCRIMP


Special Price $16.49 ($21.99 if purchased separately)

The Install Bay IBHDCRIMP

Large Gauge Hammer Style Crimper • Perfect For Large Gauge Ring Terminals • Provides Secure Connection For Large Gauge Wire &bull: Works With 1/0 To 8 Gauge Wire

Add a pair of Heavy Duty Wire & Cable Cutters and Save $4.50

Easily cut any thickness wire up to 1/0 AWG with these heavy duty curved blade cutters. They even have an extra knife blade for stripping away the insulation.







25% OFF

Xscorpion CC-06


Special Price $13.49 ($17.99 if purchased separately)

Xscorpion CC-06

Electrical Wire & Cable Cutter/Stripper • Cuts Any Thickness Wire up to 1/0 AWG • Curved Blade Cuts Wire up to 8.25mm • Extra Knife for Stripping Insulation

(Offer 1 of 2)

Combined Total Price


You Save $5.50

What's In The Box?
  • 2 x 4' 1/0-gauge ground cables with ring terminals
  • 1 x 6' 1/0-gauge power cable with ring terminals
  • 10 x wire clamps
  • 10 x screws
  • 10 x zip ties
  • 3 x additional ring terminals

General Features:

  • 100% OFC 1/0 Gauge Big 3 Upgrade Kit
  • Use to upgrade your factory battery ground wire, alternator ground wire and alternator power wire
  • Use to solve issues with dimming lights
    • More effective than a capacitor when experiencing dimming lights
  • Makes electrical system run more efficiently
    • Deeper bass
    • Amps run cooler and are less likely to go into protect mode
  • Use for systems 350A or less
  • Thick but flexible 100% AWG Oxygen Free Copper wiring
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Check out the XS Power BIG3XS Installation Procedure

Power / Ground Cable Specifications

Wire / Cable Type
Wires and cables are made for different uses. This use that the wire or cable is made for.

Please make sure that the wire you are purchasing matches the intended use.

This the how long the item is. When purchasing an item that requires a specific length (such as RCA interconnect cables or speaker wire), please make sure that the length of the item is long enough for your needs.
Wire Gauge
The measurement of the diameter of wire. As the gauge number increases the size of the wire decreases. As the wire gauge number decreases, the diameter of the wire increases. For example, an 8 gauge wire is going to be larger than a 16 gauge wire.

When purchasing wire, make sure that you know what size, or gauge of wire is needed.

Primary Color
This is the main color of the item.
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".
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.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Hammond, LA


June 9, 2014

Didn't have to do anything other than attach the wires were they needed to be. After watching youtube videos of what was required for the big 3 upgrade, I found this kit to make things easier.

50 of 93 found this helpful

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Crestwood, MO

chameleon impala

February 14, 2014

This is the real deal. Before doing the big 3 I was having big voltage drop...I was going down to .9 wjich Iis very bad. Now I dont drop below tweleve. I advise if you have headlight dimming or big voltage drops. I will say do the big 3 (with good wire like this one) before spending alot of money on a h/o alternator

53 of 106 found this helpful

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Atlanta Ga

High quality

January 11, 2014

these are high quality cables. True OFC copper the connectors
Are on very secure and in case you have to shortin the cables for any reason they give you ring terminals to put on after the others are cut off. You will not be disappointed with these at all. I know I'm not and I can be very picky when It comes to car audio

48 of 98 found this helpful

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Browse 2 questions and 11 answers
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Why did you choose this?
Sonic Electronix Store
ofc copper wire kit pre crimped
logan f on Feb 9, 2015
mike s on Aug 31, 2014
Great price for what's offered
Manuel G on Feb 4, 2015
I want to know if this cable has the ring terminals installed on the wires and if it comes with extra ring terminals and heat shrink tubing?
Big-D on Jan 15, 2015
Best Answer: Yes, this big 3 kit is ofc all ends of the connection are already crimped and ready to go. It comes with extra terminals & heat shrinks. Depending on your car setup you'll need to cut the wires to shorten them. I suggest buying some extra 1/0 ring terminals from sonic electronix just in case you run out. You'll need wire cutters & a heavy duty crimper for that task. But if you think the wire lengths are exceptional then you'll be good to go with this kit.
Note : when doing the positive run to the alternator make sure the ground is off & leave the factory in place but put the bigger connection on the bottom.
Good luck with your upgrade.
Reply · Report · Deonte N on Jan 15, 2015
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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: XS Power BIG3XS

  • XS Power Big 3 Upgrade Kits
  • Big 3 Upgrade Installation