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Rockford Fosgate RFK4X

Complete 4-gauge amplifier wiring kit
Includes patch cable and speaker wire

Save with a $249+ amplifier with a $249+ amplifier
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  • Rockford Fosgate RFK4X

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Our take on the Rockford Fosgate RFK4X

by Buck Pomerantz
Rockford Fosgate

This wiring kit includes patch cables and speaker wire for a 2-channel or mono amp — you'll need to add cables and speaker wire for multi-channel amps

Your amp needs high quality wiring in order to deliver top performance to your sound system. Rockford Fosgate's RFK4X amplifier wiring kit supplies everything you'll need to send power and signal to your amplifier and speakers, including power cable, patch cable, and speaker wire.

It's designed for amplifiers with fuse ratings of up to 100 amperes. Rockford Fosgate makes these cables from 100% pure crystal-oxygen free copper wire so you can count on maximum signal transfer.

See more info on this item

Highlights:

  • amplifier wiring kit
  • cables meet or exceed the American Wire Gauge specifications and requirements
  • 17 feet of 4-gauge power cable
  • 3 feet of 4-gauge ground cable
  • 20 feet of 18-gauge turn-on lead wire
  • one 20-foot twisted pair RCA patch cable
  • 30 feet of 16-gauge speaker wire
  • MAXI fuse holder and 100-amp fuse
  • assortment of wire termination hardware and cable ties
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

Download owner's manual

  • One 17' Power cable (4-gauge) in a red translucent jacket (has an in-line MAXI fuse holder and a ring terminal on the battery end)
  • 100A MAXI fuse
  • 3' Ground cable (4-gauge) in a translucent gray jacket (with a ring terminal on one end)
  • 16' Twisted pair RCA patch cord
  • 30' of 16-AWG speaker wire
  • 20' Turn-on lead in a blue jacket
  • Ten 4" wire ties
  • 1 Plastic grommet
  • 5 Plastic butt connectors
  • 6 Female quick slide connectors
  • 5 Male quick slide connectors
  • Eight 16-AWG Spade connectors
  • 4 Blue rubber boots
  • 4 Black rubber boots

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

General Overview: This is a single amplifier wiring kit that includes the power and ground cable, turn-on lead, one pair of stereo RCA cables, 30' length of 16-AWG speaker wire and other accessories required to install one amplifier.

High Strand Power/Ground Cable: The power and ground cable are 100% Pure Crystal-Oxygen Free Copper (PC-OFC) and meet or exceed AWG (American Wire Gauge) requirements.

In-line Fuse Holder: The included in-line fuse holder attached to the power cable comes with a 100-amp MAXI-type fuse.

Patch Cord: Twisted pair cable design is used for noise rejection, a split center pin helps secure the connections at both ends.

Speaker Wire: The amplifier kits comes supplied with high strand 16-AWG speaker wire for increased sound transfer.

 
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Rockford Fosgate RFK4X Reviews

Average Customer Review:

12 people say:

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5 out of 5

Wiring Harness

Written By Terry, Corbin, KY on Thursday, July 10, 2014
Crutchfield Customer Review (What's this?)
 
Super quality you get what you pay for.
Pros:
Everything they claim
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Wiring Harness

Written By Anonymous, Vallejo California on Saturday, June 14, 2014
Crutchfield Customer Review (What's this?)
 
Everything I needed was in the package. Crutchfield takes all the thinking out of the process with the research they put into the product line for you.
Was this review helpful?    Yes | No
 
5 out of 5

Just what I expected.

Written By Dan C., Cbus, Ohio on Tuesday, May 13, 2014
Crutchfield Customer Review (What's this?)
 
good set of high quality well insulated cables that when bought with my amp were 50% off just what I expected plus gets you a second year of warranty when used with your Fosgate amp so doubly sweet.
Pros:
extra year of warranty and just what you need to install no extra bits needed
Cons:
none that I can find other than extremely small terminal connecters on ground cable made it really had to find an actually bolt to fit it in my truck the connector was about a 10mm hole and the safety harness and bolt to my seats (only bolts near unit) are at least 14 mm so would like to see the preinstalled terminal connectors in a bigger size
Was this review helpful?    Yes | No
 
5 out of 5

Connects right to the battery without anything additional needed

Written By Peczenij, Bethlehem, PA on Thursday, December 19, 2013
Crutchfield Customer Review (What's this?)
 
Fine product. Speaker wire is only 16 gauge however - I would have preferred larger wire.
Pros:
Connects to battery easily without needing anything else.
Cons:
Fuse holder a bit confusing at first
Was this review helpful?    Yes | No
 
2 out of 5

RFK4X Amp Wiring Kit

Written By Britt C, Richmond, VA on Sunday, September 22, 2013
 
I have always trusted the Rockford Fosgate brand. You usually get higher quality products at a reasonable price. But I was disappointed when I opened the kit. The fuse holder was awkward to use, the RCA cables were low quality and the crimp connectors were junk! The only positive was the power cable and ground cable, they were top notch. All parts required for installation were there and my install went just fine but for the money I expected more.
Pros:
Power and ground cables were high quality.
Cons:
Crimp connectors, RCA cables and fuse holder were of lesser quality.
Was this review helpful?    Yes | No
 
5 out of 5

Amp Kit

Written By Eddie, Knoxville, IA on Tuesday, April 09, 2013
Crutchfield Customer Review (What's this?)
 
Have everything you need to install the amp. What else can I say.
Pros:
Everything as advertised.
Cons:
none
Was this review helpful?    Yes | No
 
4 out of 5

Rockford Amp wireing kit

Written By Cobster, Sargent, Ne on Wednesday, February 13, 2013
 
Everything is good but the RCA cables are cheaply made compaired to the rest of of the kit.
Pros:
Cabels are 100% copper and super flexable
Cons:
RCA cables are cheaply made
2 out of 2 people found this helpful
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5 out of 5

Great kit

Written By DDC, Gallup, NM on Monday, September 24, 2012
Crutchfield Customer Review (What's this?)
 
All I needed to hook up my system. High quality wiring and works perfectly with the equipment I chose.
3 out of 3 people found this helpful
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2 out of 5

ticked off

Written By Anonymous, Chicago Illinois on Thursday, June 14, 2012
Crutchfield Customer Review (What's this?)
 
put everything in found out the patch cables or RCA cables we're defective
Pros:
everything was great except for the patch cables
Cons:
kind of expensive and my cables did not work should've tried another brand
2 out of 3 people found this helpful
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4 out of 5

Great kit, not so great price.

Written By Garrett, OKC, OK on Wednesday, March 18, 2009
 
Pros:

True AWG wire.

High strand count <---That's a good thing.

EXTREMELY flexible. You can pretty much tie this in a knot without worry of breaks, which makes it your best friend for complicated and cramped installs.

The kit is complete with everything you need. More than you need actually!


Cons: It's possible you will have to drill out or notch the power ring connector, but this is not difficult with a sharp drill bit or other "correct" tools. The connector is high quality however, so I guess that's a plus.

Price. Even for such a great product, that's a steep one.


REMEMBER: Be safe, don't mess with live wires!
31 out of 34 people found this helpful
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5 out of 5

Good kit

Written By slvbeard, Central, MD on Friday, September 05, 2008
 
Good kit for the money, flexible thick wire. Works well.
10 out of 10 people found this helpful
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2 out of 5

EHHHHH

Written By GrandAm84, Wisconsin on Sunday, January 13, 2008
 
To start out i have 2 12" Rockfords with a amp. Before this kit everything was working fine but i hooked this up and nothing happend. i double checked everything and still dont know what i did wrong. Also the power cable end didnt fit the battery to good so i had to re drill that to. Overall pretty bad for what i was expecting from Rockford which has always been good to me
37 out of 104 people found this helpful
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After $2.00 Price Break

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Rockford Fosgate RFFM100 MAXI Fuse Pair of 100-amp platinum-plated wafer fuses
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Rockford Fosgate RFFM60 MAXI Fuse Pair of 60-amp platinum-plated wafer fuses
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For a more in-depth review and enhanced detailed information on the Rockford Fosgate RFK4X, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_575RFK4X/Rockford-Fosgate-RFK4X.html ).

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Compare with other Rockford Fosgate models

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Includes patch cable and speaker wire