Garage
Shop

See all parts that fit your 2011 Flex

Tsunami Big 3 Kit (Blue)

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

Tsunami
Shop all Tsunami
EXCLUSIVE
Product videos
highlight-star-icon

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

Learn more about the tsunamibig3kit-blue

We apologize

This item has been discontinued


Loading...
NSH-5601 main

NVX NSH-5601

Install New Speakers in select 1998-2024 vehicles from Ford, Mazda, Lincoln

-38.49%

$7.99

List price $12.99

99-5842T main

Metra 99-5842T TurboTouch Dash Kit

Single DIN or Double DIN Stereo TurboTouch Dash Kit and Harness for select 2010-2012 Flex without Navigation

-30.03%

$430.99

List price $615.99

51KSC3504 main

Kicker KSC35 (51KSC3504)

200W Peak (100W RMS) 3.5" KS Series 2 Way Coaxial 4-ohm Speakers

4
-11.11%

$79.99

List price $89.99

FRING68 main

NVX FRING68

Universal 6x8" or 5x7" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

12
-46.68%

$15.99

List price $29.99

H7653 main

Cerwin-Vega H7653

680W Peak (120W RMS) 6.5" HED Series 3-Way Coaxial 4-ohm Speakers

43
-16.67%

$79.99

List price $95.99

H7683 main

Cerwin Vega H7683

720W Peak (120W RMS) 6x8" HED Series 3-Way Coaxial 4-ohm Speakers

50
-16.67%

$79.99

List price $95.99

H735 main

Cerwin-Vega H735

500W Peak (60W RMS) 3.5" HED Series 2-Way Coaxial 4-ohm Speakers

34
-16.67%

$59.99

List price $71.99

VT1 main

Cerwin-Vega VT1

360W Peak (120W RMS) 1" Vega Series 2025 Edition 4-ohm Tweeters with External Crossovers

XED1T main

Cerwin-Vega XED1T

1000W Peak (90W RMS) 1” XED Series 4-ohm Piezo Dome Tweeters

19
-16.67%

$29.99

List price $35.99

ADS-MRR main

iDataLink Maestro RR Interface Module

Universal Stereo Replacement Interface Module for iDataLink Maestro Compatible Stereos

36
-17.39%

$189.99

List price $229.99

Product Highlights


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

Description


Tsunami brand icon

Authorized dealer

Sonic Exclusive Big 3 Upgrade Combo Package

The Big 3 Upgrade should be the first step you take when adding a aftermarket sound system to your vehicle. The Big 3 consist of upgrading the alternator wire to the battery, the negative battery cable to vehicle ground, and engine ground to chassis. This process is sure to help eliminate dimming headlights and voltage drops by providing you with enough juice to power everything in your vehicle without additional resistance. 1/0 Gauge power & ground wire should be used when executing the upgrade, the thicker wire ensures the best possible current transfer and can re-energize your vehicles electrical system.

Available only at Sonic Electronix is the Tsunami Ultimate Big 3 Upgrade Kit. This exclusive Big 3 combo package comes with two 5 ft. pieces of 1/0 AWG Silver Power/Ground Cable, 5 ft. piece of 1/0 AWG Blue Power/Ground Cable, one Positive/Negative Battery Terminal Clamp, four 0/2 Gauge Ring Terminals and a pair of Wire & Cable Cutters to add some convenience to this upgrade.

Benefits of Big 3 Upgrade

  • Helps eliminate dimming headlights
  • Helps stop drops in voltage
  • Enhances your vehicles electrical system stability
  • Allows you to add a second battery or high output capacitor for high powered sound systems
  • Improves vehicles system charging
  • Increases compatibility when using high performance alternators and batteries
  • Strengthens power current to everything in your vehicle without additional resistance

Includes Everything You Need To Upgrade The Big 3

Note: For information on installing this Big 3 Upgrade kit, please read our blog and watch the step by step installation video.

Loading...
REF507CF_2_MET-825601_2 main

2 Infinity REF507CF (INFSPKRF507CFUS) w/ Adapter Plates

390W Peak (130W RMS) 5.25" Reference Series 2-way 3-ohm Component Speaker System with Speaker Adapter Plates

3
-12.14%

$477.88

List price $543.88

DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

3
-19.05%

$339.99

List price $420.00

Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

123
-33.36%

$79.96

List price $119.99

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

Club 322F main

JBL Club 322F (SPKCB322FAM)

150W Peak (50W RMS) 3.5" Club Series 2 Way Coaxial 3-ohm Speakers

1
-27.29%

$79.95

List price $109.95

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00


Best selling similar products

BBG3KT small

Belva BBG3KT

• 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

(48)

$49.99

List price $79.99

XBG3PK small

NVX XBG3PK

• 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

(91)

$109.99

List price $119.99

Specifications & Details


Cable / Wire Specifications
Wire / Cable Type
Power / Ground Cable
Length (ft.)
15 feet
Wire Gauge
1/0 gauge
Primary Color
Silver
Secondary Color
Blue
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

TSUNAMI BIG 3 KIT-BLUE

Weight:

7.35lbs

Internal SKU:

tsunamibig3kit-blue

Internal Product ID:

39341

Product and How-to Videos


Customer Ratings & Reviews


Tsunami Big 3 Kit (Blue) thumbnail image

5 star
50%
4 star
50%
3 star
0%
2 star
0%
1 star
0%



Durability
4.2
Value
4.7
Features
4.9
Design
4.5
Usability
4.4

Customer Reviews

Sort by:

Loading...

pretty good

I have just installed this in my blazer and it helped out alot. The only thing I didnt like about it, is that you have to cram the 0 gauge wire in the battery terminals and it gets a little messy. But other than that it was a great buy. I would recomend it.

By toby on September 20, 2011

7 found this helpful


worked great

I just upgraded all the cables for my "big three upgrade" using this kit. I put it in an 07 toyota and it tremendously helped my 1200 watt RMS speaker and sub system. Thanks Sonix!

By Robert L. on November 14, 2011

3 found this helpful


Good wires, good price

I should have bought this with my system as its far more expensive buying 0 gauge here in Australia, this is great stuff at a great price. Only reason im not getting it now is because USPS takes over 3 weeks and I am willing to pay more to get my system running sooner but if your looking at buying sub(s) and an amp that require over 1000rms definately think about getting this with it.

By Sam on January 24, 2012

4 found this helpful


Pretty good.

The ring terminals for the 1/0 AWG are too small even with taking out the spacers that are on the inside of them. The ring terminals also have very cheap screw heads that will round off or start to strip because its a non hardened metal. Same goes for the battery terminals, you can not get the wires inserted perfectly without cramming them in and then it leaves it looking messy. The wire and cutters are good quality and it is a fair price. The cutters are very sharp which made cutting the wires extremely easy!

By Brandon on November 2, 2011

3 found this helpful


Not bad, could use improvements.

The ring terminals and the battery terminals were both too small to fit true 1/0 AWG wire into them. With the ring terminals I even took out the inside spacers and it still barely fit. The ring terminals are low quality because the screws to secure the wire inside of them are just too cheap of a metal because it's not hard enough metal to take the torque. I ended up stripping the head of them. I really liked the wire cutters, they were sharp and cut cleanly through the wire with no problem.

By Brandon on November 2, 2011

3 found this helpful


It works!

Real true to awg standards, 100% ofc wire. Its legit, and does help with my voltage drops. The best thing has to be the terminals though, they are sick. Any gauge, multiple batterys, multiple amps, anything they can be used for.

By Robert on April 23, 2012

2 found this helpful



04S12X2SP small

Kicker 04S12X2SP SPAIR2

$159.99

List price $279.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2011 Ford Flex

2006 Nissan Altima

1984 Porsche 944

2000 Mercedes-Benz C-Class

1979 Cadillac DeVille

2024 Audi A3

2002 Volvo S60

1994 Lincoln Mark VIII

2006 Isuzu i-280

1989 BMW 635CSi

Vehicle
Store
Delete

2002 Harley Davidson FLHT/I Electra Glide Standard

Vehicle
Store
Delete

2018 Can-Am Defender XT HD10

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.