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SoundBox

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

  • Based on 3,921 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Mar 29
Order within 3 hours and 31 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

Voltage: 12


Manufacturer: SoundBox


Mounting Type: Surface Mount


Brand: SoundBox


Number of Channels: 2


Voltage: ‎12


Manufacturer: ‎SoundBox


Mounting Type: ‎Surface Mount


Brand: ‎SoundBox


Number of Channels: ‎2


Output Power: ‎2500 Watts


Package Type Name: ‎box or bag


Material: ‎copper, plastic


UPC: ‎850000519732


Package Dimensions: ‎11.77 x 9.17 x 3.15 inches


Item Weight: ‎2.64 pounds


Item model number: ‎20ECK4v2


Date First Available: ‎June 20, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 29

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

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View our full returns policy here.

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Top Amazon Reviews

    • 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
    • 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
    • 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
    • Great quality just a little misleading on wire size
Quality kit, only complaint is that the power and ground wires are not true 4 gauge. The actual wire itself is more 8 gauge, the sheath is of 4 gauge size just not the wire.
Reviewed in the United States on February 17, 2026 by Travis
    • 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
    • Excellent
Excellent
Reviewed in the United States on December 23, 2025 by Jose Carlos Reyes
    • Exactly what I needed.
Review Image by Jeff the Azon Customer Jeff the Azon Customer
Review Image by Jeff the Azon Customer Jeff the Azon Customer
Review Image by Jeff the Azon Customer 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 by Jeff the Azon Customer Jeff the Azon Customer
    • Overall good, RCA plug quality is lacking.
The kit overall was good. The RCAs quality as far as sound are on par with other wires but the metal sleeve on end got stuck in my amp like other users mentioned. Pretty disappointing since I only removed them twice from initial install. 3 stars since I had to remove my seats in my truck and interior panels to replace them. Normally I wouldn’t care but I used these in a 90s era American truck and you have to take a lot of care removing said panels. ... show more
Reviewed in the United States on October 28, 2025 by Ryan King

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