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SoundBox

SoundBox ECK4v2, 4 Gauge Amp Kit - Complete Amplifier Install Wiring - 2500W

  • Based on 4,168 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jun 27
Order within 20 hours and 11 minutes
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Features

  • Complete 4 Gauge Amplifier Install Kit
  • New and Improved Design with Upgraded Fuse Holder and Increased Wire Strands
  • Peak Power Rating: 2500 Watts
  • Includes Speaker Wire and Twisted Pair RCA Cables
  • Includes Installation Accessories and Wire Loom

Color: Red, Black


Brand: SoundBox


Material: copper, plastic


Number of Cable Strands: Multi Strand


Voltage: 12


Color: Red, Black


Strands: Multi Strand


Voltage: 12


Wire Diameter: 3.25 Millimeters


Material Type: copper, plastic


Brand Name: SoundBox


Manufacturer: SoundBox


UPC: 850000519732


Part Number: 20ECK4v2


Model: 20ECK4v2


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Good business
Great product
Reviewed in the United States on June 7, 2026 by corellrichardson
    • Good for for the money - CCA 4 AWG
Better than I expected. Used this to install a 4 channel amp on a drift car. The power wire is CCA (Copper Clad Aluminum) which for this application was great because I didn't need a ton of power and it only weighs about 1.5 lbs (easily 10 lbs if pure copper). Fuse is kinda cheap but it does the job. Speaker wire is CCA so that should probably just go in the bin but even without that it's still a good deal. I wouldn't use this on a high end install but this kit definitely has its place and I was happy with my purchase. ... show more
Reviewed in the United States on March 26, 2025 by Consumer_Zero
    • Used to install a 2400 watt subwoofer amplifier
Everything I needed including wire ends for a sound stream 4500.d amplifier. I installed in a 3rd generation Tacoma (2021 TRD sport) behind the rear seats and had about 4 feet of extra positive 4ga wire. I think it would be more than long enough for most sedans. The power wire is full 4ga and copper coated for great electrical properties. It doesn’t get warm when driving 1600w-2000w to a pair of 10 inch subwoofers. Speaker wire is also very thick and easy to strip. The RCAs have good ends and seemed to block an interference from the power wire (I ram signal and power close together for better packaging. I would buy again and saved 59 dollars vs other brands. Highs Great value Good quality Works for a 2000-2400w amplifier Easy to strip wires Good wire flexibility Long enough for most installs ... show more
Reviewed in the United States on September 22, 2023 by Thomas Scherer
    • Great value for money
Works great for the price. everything set up to plan, although I recommend buying wire shrink separately because what comes with this set is very cheap and doesn't shrink well at all.
Reviewed in the United States on December 14, 2025 by Rowlen
    • Excellent Amp Kit
Excellent kit,installed fast and more than enough for a large suv
Reviewed in the United States on February 20, 2026 by MIKE
    • Price is right
Price is very good as well as the quality!
Reviewed in the United States on December 17, 2025 by Anthony Flammond Jr
    • Works good except for fuse also power wire not long enough
Everything that came included was pretty good but your power wire at least for my car I needed more length I would recommend 20 feet or more and then the fuse!!! IT BLEW IN JUST 2 DAYS just make sure this is the one you want to get. before you buy.
Reviewed in the United States on February 11, 2026 by William Patton
    • Exactly what I needed. Exactly what I needed.
Review Image by Jeff the Azon Customer
Review Image by Jeff the Azon Customer
Review Image by Jeff the Azon Customer
I ran the amp kit and wiring, connected the amp and subwoofer, and was all set 🔥🔥🔥
Reviewed in the United States on December 2, 2025 Reviewed in the United States on December 2, 2025 by Jeff the Azon Customer

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