Expert Service 1-877-289-7664 [Hours]

Boom. SUBTEMBER is here!

Rockford Fosgate RFK4X

4 Gauge Complete Amplifier Installation Kit

Out of Stock - Backorder
|

List price $162.99

$99.99

with warranty

You Save: $63.00 (38.65%)

Add an Extended Warranty

Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

Get FAST answers from customers ASK a Question See questions answers

Product Features:
  • 4 Gauge Complete Amplifier Installation Kit
  • Designed specifically for car audio systems up to 1000 watts
  • Premium power and ground wire provides optimal power transfer
  • Made from 100% oxygen-free copper for a pure uninterrupted transfer of power
  • Includes 2-channel RCA interconnect cables for the audio signal connection from the receiver to the amplifier
  • RCA Interconnects are made with twisted-pair technology for noise reduction
  • Terminals are nickel-plated for excellent signal transfer
  • Maxi Fuse holder offers ideal protection for high powered systems
  • True-to-Gauge cables/wires meet or exceed the industry standard of copper required for the gauge size
Package Includes:
  1. 17ft. 4-Gauge power cable
  2. 3ft. 4-Gauge ground wire
  3. 30ft. 16-Gauge speaker wire
  4. 20ft. Twisted pair of RCA cables
  5. Maxi fuse holder and fuse
  6. 20ft. Remote wire
  7. 100 Amp fuse

Amplifier Kit Specifications

Amp Kit Type
Amplifier installation kit come in two different types: Power or Complete. Power Amp kits are designed to only provide power to the amplifier. Complete kits will provide power and signal to the amplifier. Many of the complete kits will also include speaker wire to connect the amplifier to the subwoofer.
Complete
Number of Amplifiers Supported
This is the number of amplifiers that the amplifier kit can support. If you are are going to be powering more than one amplifier, make sure that the installation kit will support them.
1
Power/Ground Wire Size
The power/ground gauge numbers represents the main wire size of the amplifier kit.

Definitions are as follows:

Gauge (wire) - The diameter of a wire. The higher the number, the thinner the wire. Example: 4 gauge wire has more strands than 10 gauge wire.

AWG (American Wire Gauge) - A standard of the dimensional characteristics of wire used to conduct electrical current or signals. AWG is identical to the Brown and Sharpe (B & S) wire gauge.
4 gauge
Power Wire Length
This is the length of the power wire in feet.
17 feet
Power Wire Color
Red
Ground Wire Length
The length of the ground wire in feet.
3 feet
Ground Wire Color
Black
Speaker Wire Included
If speaker wire is included, the value will be "Yes" and if no wire is included, it will read "No".
Yes
Speaker Wire Length
This is the length of speaker wire that is included with the item.
30 feet
Remote Wire Length
This is the length of the remote wire that is included with the item.
20 feet
Interconnect (RCA) Signal Cables Included
Interconnect cables are required for amplifiers which are installed to the "RCA preamp low-level outputs" of a car stereo receiver. If your amplifier has high-level / speaker level inputs, then you do not need to purchase interconnects; however, interconnects offer a much higher quality sound when compared to speaker level inputs.
2 Channel
Fuse Holder
This is the type of fuse holder that is included in the item.
MAXI
Fuse Size
This is the size of the fuse that is compatible with the fuse holder. If the fuse needs to be replaced, be sure to replace it with the same size.
100A
Distribution Block Included
This means that the kit includes a distribution block in the package. This will assist in the installation of the amplifier kit or any situation where a distribution block is required.
No
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". For the best performance from your amplifier wiring kit, make sure that the cable complies to the AWG standard.
Yes
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.
OFC (Oxygen-Free Copper)

Warranty and Return Policy

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

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
79%
4 Star
14%
3 Star
7%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
5.0
Value
4.7
Features
4.7
Design
4.7
Usability
4.6
Cody

Hanford, CA

Overall
Durability
Value
Features
Design
Usability
meets your needs

March 23, 2014

This wiring kit has almost everything you need only thing I would suggest is buy some more 16g speaker wire.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Matt

Newark, AR

Overall
Durability
Value
Features
Design
Usability
How Can It Get Any Better?

December 21, 2013

If your looking for a 4 gauge kit, especially for the money. Look no further, you can spend $50 more on a 4 gauge kit & the quality just won't get any better. The most flexible cables I've ever used, & very true to the 4 gauge spec. As soon as you open the box & take your cables out, you immediately know that you purchased the highest quality wire that money can buy. The kit came with everything needed for the install, no problems with the fuse holder, no problems whatsoever. I've had this kit 8 months & running, I recommended this kit to a friend (which is super picky about his wiring ect) & he wouldn't ever buy a different brand of wiring now. I highly recommend this wiring kit, I imagine a man could keep this wiring kit well over 10 years & never have a problem out of it.. If I get another vehicle, I'm taking it out and transferring it over.. Well worth it, don't spend money on a cheap kit & have to wind up buying this kit & being out of more money. Trust me, it's the best, absolutely no regrets here, 110% satisfaction.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Ulee

Frederick, CO

Overall
Durability
Value
Features
Design
Usability
Great buy!

October 10, 2013

Bought this kit to wire up my 10DCVR122 loaded enclosure & a Kicker CX.600.1. Kit comes with everything needed to wire up your system. All wires provided are more than enough which is good for someone like me who moves it around every once in a while. I'm 100% satisfied with this purchase & I would recommend it to anyone. I personally would buy again! Pros Comes with everything needed Delivers the power your system needs Great quality Cons Didn't come with stickers(lame)

0 of 0 found this helpful

Help our customers find the most helpful reviews

T-Mac

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
The Missing Link!

March 4, 2013

Excellent quality, excellent build. Its Fosgate! Includes RCA cables too.

0 of 0 found this helpful

Help our customers find the most helpful reviews

John

Fort Walton Beach, FL

Overall
Durability
Value
Features
Design
Usability
Good overall

December 23, 2012

This was a pretty good buy but it wasn't perfect. It didn't come with any crimps for my ground wire to connect to my amp. Luckily I had a lower level kit that I didn't want to use with my system laying around. I saw another review about the fuse holder. Same here. Wasn't something I had seen before and took me a little while to figure it out. I used this to connect my 2 Kenwoods in my 97 civic myself 6 months ago. All the cords were a good length except maybe the power cord. It fit but I didn't have really any slack. The wire was definitely true gauge wire. Haven't had any problems since I've hooked it up. Little pricey for the inconveniences but it does the job well.

0 of 0 found this helpful

Help our customers find the most helpful reviews

matthew

redondo beach, CA

Overall
Durability
Value
Features
Design
Usability
Hard to find in stores.

June 19, 2012

The products from Sonic are top notch. They had everything I needed that I couldn't find in the store. They arrived quick and well packaged.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Michael

Pittsburgh, PA

Overall
Durability
Value
Features
Design
Usability
Rockford delivers again!

February 16, 2012

I have always been a big fan of rockford and usually like to stick to just a few brands. Had this amp kit on my last civic hooked up to a rockford P1000-1D amp and this kit delivered the power! This is a true 4-gauge amp kit unlike some of the other kits on the market. Will never buy a different brand amp kit again!

0 of 0 found this helpful

Help our customers find the most helpful reviews

Jonah

Espanola, NM

Overall
Durability
Value
Features
Design
Usability
well done RF

May 26, 2011

It is a good kit it has everything you need and more+

0 of 0 found this helpful

Help our customers find the most helpful reviews

Joshua

Martinsburg, WV

Overall
Durability
Value
Features
Design
Usability
Good kit-

June 11, 2010

It was a good kit, I did have a couple problems figuring out the fuse block (it was nothing that I had seen before) but I figured it out. Other than that- it was a good kit at a great price.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Alex

Santa Rosa, CA

Overall
Durability
Value
Features
Design
Usability
Best cable you can get.

April 5, 2010

I bought this cable knowing it was a great cable. I've been told it doesn't get better than this. I have it connect to my 1500 Rockford Fosgate amp and 2 12" L7 square kickers. It sounds great and hear nothing but bass coming from my speakers. Must buy!

0 of 0 found this helpful

Help our customers find the most helpful reviews

JD

clackamas, or

Overall
Durability
Value
Features
Design
Usability
awesome wiring kit

February 28, 2010

this kit was perfect for my setup. the included 100 amp fuse was just the right size for my amp. also the extra strands of wire compared to regular cable made it able for me to not need a capacitor in my system. The fuse block could be a little farther from the end lug, and the lugs would be a lot better if they were soldered on ins ted of crimped but its perfect for the price.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Stephanee

Flagstaff, AZ

Overall
Durability
Value
Features
Design
Usability
Worth The Price!!!

September 18, 2008

Great wiring kit. Everything comes with it. Great Price. I have this kit powering a Alpine PDX 1.600/12" Type-R. Good job Sonic...

0 of 0 found this helpful

Help our customers find the most helpful reviews

Sean

Newport News, VA

Overall
Durability
Value
Features
Design
Usability
Great Kit

July 3, 2008

Great kit, I have a kenwood 1800 watt amp that I am using. The one thing that I really liked about this kit is that the power wire is actually long enough to reach my trunk space and I have plenty of slack left over.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Mohd Azidi

Malaysia

Overall
Durability
Value
Features
Design
Usability
Complete Kit

March 4, 2008

I'll give 5/5 for this installation kit. the cables are very solid & easy to install. fast shipping time. just 7 days to Malaysia!

0 of 0 found this helpful

Help our customers find the most helpful reviews

Accessory Tools and Products

Accessories added

NVX X-Series RCA Interconnect Cables

16.4 ft of X-Series 2-Channel RCA Audio Premium Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $18.99

Scosche Distribution Block

Single 4 AWG input to four 8 AWG output distribution block plated in chrome

Your Price $4.99

Heavy-Duty Grommet

This Stinger heavy duty grommet is the perfect and safe solution to running wires through the firewall.

Your Price $5.99

Black Cable/Zip Ties

100 pack of 12" zip ties - These cable ties provide a secure installation of your cables and wires, as well as making installation simple and fast.

Your Price $5.99

Door Panel & Upholstery Remover Tool

Easily remove your door panels and other panels to make the installation of your new tweeters easy.

Your Price $5.99

Universal Window Handle Remover Tool

Remove your manual windows and door panels with this simple and convenient tool.

Your Price $9.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $6.99

Car Audio Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $12.99

Browse 1 question and 1 answer
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
To match my subs and its reputable products
Leilani L on Aug 2, 2014

Product Summary

Manufacturer

Model Number

RFK4X

UPC

780687325534

Weight

5.00lbs

Internal SKU

rfk4x

Internal Product ID

10321

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: Rockford Fosgate RFK4X