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Rockford Fosgate RFK4D4 AWG Complete Dual Amp Installation Kit

4.675 reviewsSee all reviews

Reviewers praise the kit as a complete, well‑organized solution with true 4 AWG power wiring and pre‑terminated ends, making dual‑amp installs straightforward. A few users noted compromises in speaker cable construction and that the distribution block forces an 8 AWG feed for the secondary run.

Buyer confidence

84%

Highlights

  • 1 Year Warranty
  • 16 AWG (1.31mm²) 65 strands
  • 8 AWG (8.36mm²) 735 strands
  • Includes appropriate wire termination hardware

Key specs

Full specs
Battery PWR/GND Gauge
4 AWG
Amplifier PWR/GND Gauge
8 AWG
Speaker Wire Gauge
16 AWG
Fuse Size
100 Amp
Fuse Type
MAXI
Dual Amp Installation Kit
Yes

Key specs

Full specs
Battery PWR/GND Gauge
4 AWG
Amplifier PWR/GND Gauge
8 AWG
Speaker Wire Gauge
16 AWG
Fuse Size
100 Amp

Highlights

Overview
  • 1 Year Warranty
  • 16 AWG (1.31mm²) 65 strands
  • 8 AWG (8.36mm²) 735 strands

Review highlights

Based on customer reviews

Well‑equipped, heavy‑gauge dual‑amp wiring kit

Reviewers praise the kit as a complete, well‑organized solution with true 4 AWG power wiring and pre‑terminated ends, making dual‑amp installs straightforward. A few users noted compromises in speaker cable construction and that the distribution block forces an 8 AWG feed for the secondary run.

75 reviews4.6/5 averageUpdated Mar 15, 2026

What buyers praise

  • Comprehensive contents for two amps (cables, connectors, zip ties, etc.)
  • Heavy 4 AWG power cable with pre-terminated ends

What to watch for

  • Distribution block design can require stepping down to 8 AWG for the second amp — may limit amp choice or require alternative runs
Overview

4 gauge complete power, ground and signal installation kit for two amplifiers.

Best for

  • Dual-amplifier car audio installations that require 4 AWG power and ground cabling and complete signal/wiring component…

Key points

  • Includes multiple gauge power and ground wires: 17 ft of 4 AWG power, 6 ft of 8 AWG power, 3 ft of 4 AWG ground, and 6 ft of 8 AWG ground.
  • Speaker and signal wiring included: 30 ft of 16 AWG speaker wire and two 16 ft twisted-pair RCA cables.
  • Power distribution and protection: Maxi fuse holder with 100 A fuse and two 4 AWG distribution blocks.
  • Additional wiring: 20 ft of remote wire for amplifier turn-on.
  • Technology/tags: CTA-2015, includes power wire, fused distribution, speaker wire, RCA cables, dual amp installation.

Fit and use

Supplies power, ground, speaker and signal connections for two amplifiers in a vehicle. Provided distribution blocks and a fused maxi holder allow consolidated power routing and basic power protection. Verify wire lengths and gauge meet your installation layout before beginning work.

What to know

This kit provides a full set of wires and basic distribution components for a two-amplifier install. Confirm the included wire lengths and 4 AWG capacity match your amplifiers' current requirements and your vehicle's routing needs. The kit lists components and lengths so you can check fitment and plan connections.

Highlights

Key features

  • 1 Year Warranty
  • 16 AWG (1.31mm²) 65 strands
  • 8 AWG (8.36mm²) 735 strands
  • Includes appropriate wire termination hardware
  • Full Spec Cable meets or exceeds AWG (American Wire Gauge) requirements
  • Cables use 100% pure crystal-oxygen free copper (PC-OFC)
  • 4 AWG (21.1mm²) 1,862 strands
  • CTA-2015
  • Includes Power Wire
  • Includes Fused Dist.
  • Includes Speaker Wire
  • Includes RCA Cables
More info

Manufacturer details

4 gauge complete power, ground and signal installation kit for two amplifiers.

Additional details

Kit includes 17 feet of power wire 4 AWG/6 feet of power wire 8 AWG, 3 feet of ground wire 4 AWG/6 feet of ground wire 8 AWG, 30 feet of 16 AWG speaker wire, (2) 16 feet twisted pair RCA's, Maxi fuse holder and fuse, (2) 4 AWG distribution blocks, 20 feet of remote wire, 100 Amp fuse.

Technologies
CTA-2015

CTA-2015

Rockford Fosgate cables conform to the CTA-2015 industry standard. The standard specifies the exact amount of

Includes Power Wire

Includes Power Wire

This amplifier kit includes power wire by including necessary cable for both B(+) and GND(-) connections.

Includes Fused Dist.

Includes Fused Dist.

This amplifier kit includes fused distribution. It utilizes a stand-alone fuse holder that can be installed in a

Includes Speaker Wire

Includes Speaker Wire

This amplifier kit includes speaker wire. These cables connect the amplifier to the speakers. All wires in this

Includes RCA Cables

Includes RCA Cables

This amplifier kit includes RCA patch cables. These are the necessary cables used to transfer low-level signal

Dual Amp Installation

Dual Amp Installation

This amplifier kit is designed to install two amps in one system. This includes all necessary cables for proper

Specs

Specifications

6
Battery PWR/GND Gauge4 AWG
Amplifier PWR/GND Gauge8 AWG
Speaker Wire Gauge16 AWG
Fuse Size100 Amp
Fuse TypeMAXI
Dual Amp Installation KitYes
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