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Rockford Fosgate RFK4X

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

Item # 575RFK4X

Your amp needs high quality wiring in order to deliver top performance to your sound system.

Your amp needs high quality wiring in order to deliver top performance to your sound system.

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Contact our Virginia-based experts.

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$109.99

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About the Rockford Fosgate RFK4X

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.

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.

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Product 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
  • MFR # RFK4X

What's in the box:

  • 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

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Rockford Fosgate RFK4X reviews

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Rockford Fosgate RFK4X

Crutchfield customer from Houston, TX on 8/13/2019

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Really happy with quality of this amp wiring kit. I have bought cheaper ones before and this one is worth the money.

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Cons:

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0 of 0 found this helpful

Rockford Fosgate RFK4X

Crutchfield customer from Piedmont, SC on 8/11/2019

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I bought the r1200-1d amp and got this at a discount. The installers at best buy were impressed, it has everything you need.

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0 of 0 found this helpful

Rockford Fosgate RFK4X

Crutchfield customer from Conroe, TX on 8/5/2019

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Installed in my 2015 Tahoe LTZ. Enough wire to reach the back seat. Would not reach cargo area. Awesome quality.

Pros: Quality of kit.

Cons: Not enough length to reach cargo area of 2015 Tahoe.

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1 of 1 found this helpful

Just What I Needed

Crutchfield customer from Las Vegas, NV on 6/13/2019

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A comprehensive package that offers the most common necessities for medium power amplifier installs. While the price could be lower this is still the kit I turn to when installing an amplifier. All the components are high quality and ample wire lengths are included. If I could change anything about it I would up the gauge of the speaker wire and give a few more feet of it as well.

Pros: quality, fairly complete

Cons: price, speaker wire could be bigger and longer

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1 of 1 found this helpful

Rockford Fosgate RFK4X

Thomas J from Menomonee Falls, WI on 3/6/2019

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Really good wiring kit. I would have rated 5 stars if they would have included zip ties that dont break under their own weight

Pros: Everything

Cons: Zip ties

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1 of 1 found this helpful

Rockford Fosgate RFK4X

Jesse from Federal Way, WA on 1/9/2019

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More then everything I needed!

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0 of 0 found this helpful

Rockford Fosgate RFK4X

Crutchfield customer from Valrico, FL on 1/6/2019

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Had everything that I needed, constructed very well.

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0 of 0 found this helpful

Rockford Fosgate RFK4X

Crutchfield customer from Yreka, CA on 12/6/2018

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Looks like it will work fine

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0 of 0 found this helpful

Rockford Fosgate RFK4X

Robert from Kasilof, AK on 10/31/2018

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Quality!

Pros: Everything I needed was there and more

Cons: None

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0 of 0 found this helpful

Great kit

Andre from Lomita, CA on 10/4/2018

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Really high quality!

Pros:

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1 of 1 found this helpful

Rockford Fosgate RFK4X

Crutchfield customer from Grand Junction, CO on 7/15/2018

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Worked nicely, good quality. Good buy. Would recommend to a friend

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1 of 1 found this helpful

Rockford Fosgate RFK4X

Wade from College Place, WA on 5/18/2018

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Perfect for my Amp installation. Everything was included, Awesome

Pros: Perfect

Cons:

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0 of 0 found this helpful

Rockford Fosgate RFK4X

Richard from Los Gatos, CA on 12/14/2017

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The wiring kit had everything I needed to connect my T1000X5ad. The wire and insulation were flexible and high quality.

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Cons:

Crutchfield response on

1 of 1 found this helpful

Good stuff

Justin from Kodiak, AK on 11/18/2017

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Very nice product. High quality wire set that is very durable and very flexible which helps for installing in tight places! I gave it a 4 star rating due to the only thing i disliked was the way the fuse holder is designed requires the fuse to stick out and be exposed to the elements. i live in a very wet/rainy place where it rains 75% of the year. However , Other than that i love these kits!

Pros: Flexible, high strand count for more current flow. High quality all around.

Cons: Exposed main fuse in fuse holder to water/dirt.

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2 of 2 found this helpful

Perfect gauges

Kapii from Dalhart , Texas on 8/18/2017

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Outstanding equipment and perfect gauges

Pros: Exact size gauge for the power

Cons: N/A

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2 of 2 found this helpful

EASY INSTALL.

Brycen from Long Beach, CA on 7/31/2017

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easy to install.

Pros: Grate flex easy install.

Cons: none.

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1 of 1 found this helpful

Great wiring kit.

Albert from Conway, AR on 4/9/2017

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The Rockford Fosgate RFK4X wiring kit is definitely the kit to get. You can immediately tell that the power and grounding cables are good quality, high strand count which makes it flexible and easy to install. I used it to connect a Rockford Fosgate R1200-1D amplifier driving 2 Rockford Fosgate P2D2-12 subs. I installed this system in my 2008 Jeep Wrangler Sahara. I mounted the amp in the rear of the vehicle, the cable was perfect in length. I used all elements of this kit with the only exception being the speaker wire, since the subs are mounted in the rear I had plenty of wire left. I recommend retightening the power cable on both sides of the fuse holder. I also used dielectric grease on all my connections. Great kit, definitely delivering the power and a good signal to the amp.

Pros: High flexibility, easy to install.

Cons: None.

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3 of 3 found this helpful

Watch your length

Brad from Champaign, IL on 3/15/2017

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Overall good kit, the only issue I had is the lengths were not long enough for my Trailblazer. If you have a large vehicle with 3 rows of seating, this may not be long enough. I contacted Crutchfield and they took very good care of me.

Pros: Everything you need in 1 kit

Cons: Short lengths on large SUV's

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2 of 2 found this helpful

Rockford Fosgate RFK4X

thomas from Oregon, IL on 1/16/2017

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Decent quality wiring kit for the money

Pros:

Cons:

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0 of 1 found this helpful

Rockford Fosgate RFK4X

Todd from Port Orchard, Wa on 1/16/2017

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Better than your average kit. The inline fuse box on the power wire has a locking feature so you don't have to worry about it vibrating out

Pros:

Cons:

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3 of 3 found this helpful

The hookup

Karl from Dundas, MN on 7/5/2016

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This is yet another excellent product from Rockford Fosgate. The only issue I have with it is that it is supposed to be for a 4 channel amp but only comes with one RCA cable. Otherwise, everythign you need is here to install a 4 channel amplifier.

Pros: sturdy looks good

Cons: needs second set of RCA cables for 4 channel amplifier set up

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2 of 4 found this helpful

amp Kit

mason from peoria IL on 5/9/2016

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This kit was everything I needed to hook up my amp. It was nice not worrying about if I have all the part and wires i need, since everything you need are included.

Pros: Everything you need to get everything hooked up

Cons: none

Crutchfield response on

4 of 4 found this helpful

Great product

Trent from Florida on 11/30/2015

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Great product! Everything was really good quality and all wires were plenty long enough for my install . its nice because you don't have to worry about forgetting anything its all in one package .

Pros:

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Crutchfield response on

1 of 1 found this helpful

Good Quality

Jukebox from Scott La on 6/19/2015

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Solid lil wiring kit not too pricy and just what I needed.

Pros: High grade wire and the fuse block was of good construction.

Cons: I would like to see different grounding options included with these kits. Like the terminals that have three holes to get a better ground when you can't get to a bolt location.

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0 of 0 found this helpful

decent enough

Spud from Volcano, HI on 3/23/2015

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not bad. everything u need. good quality wire as well. little pricey, but works well. dont get voltage drop or amperage loss at end of 17' run.

Pros: good main wire, good speaker wire, good rca cables

Cons: maxi fuse.... not water tight casing...... make sure its in a good dry spot...... connectors not soldered only crimped. for the price, they could have upped the 'perfectionism' of it. fosgate claims top of the line.... so prove it

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4 of 5 found this helpful

PERFECT FOR INSTALL

PERFECT FOR SELF INSTALL from SANTA ROSA, CA on 1/27/2015

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THIS IS EVERYTHING YOU NEDD I ONLY SUGGESTT GETTING ANOTHER SET OF RCA CABLES FOR REAR OUTPUT CONTROL, OTHERWISE PERFECT KIT FOR SELF INSTALL, I DID HOWEVER NEED MORE SPEAKER WIRE, BUT ALL QUALITY PRODUCTS INSIDE THIS KIT!

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0 of 0 found this helpful

Wiring Harness

Terry from Corbin, KY on 7/10/2014

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Super quality you get what you pay for.

Pros: Everything they claim

Cons: None

Crutchfield response on

1 of 1 found this helpful

Wiring Harness

Crutchfield customer from Vallejo California on 6/14/2014

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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.

Pros:

Cons:

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1 of 1 found this helpful

Just what I expected.

Dan C. from Cbus, Ohio on 5/13/2014

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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

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2 of 2 found this helpful

Connects right to the battery without anything additional needed

Peczenij from Bethlehem, PA on 12/19/2013

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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

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1 of 2 found this helpful

RFK4X Amp Wiring Kit

Britt C from Richmond, VA on 9/22/2013

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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.

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5 of 8 found this helpful

Amp Kit

Eddie from Knoxville, IA on 4/9/2013

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Have everything you need to install the amp. What else can I say.

Pros: Everything as advertised.

Cons: none

Crutchfield response on

1 of 2 found this helpful

Rockford Amp wireing kit

Cobster from Sargent, Ne on 2/13/2013

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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

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4 of 4 found this helpful

Great kit

DDC from Gallup, NM on 9/24/2012

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All I needed to hook up my system. High quality wiring and works perfectly with the equipment I chose.

Pros:

Cons:

Crutchfield response on

4 of 4 found this helpful

ticked off

Crutchfield customer from Chicago Illinois on 6/14/2012

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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

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3 of 5 found this helpful

Great kit, not so great price.

Garrett from OKC, OK on 3/18/2009

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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!

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32 of 35 found this helpful

Good kit

slvbeard from Central, MD on 9/5/2008

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Good kit for the money, flexible thick wire. Works well.

Pros:

Cons:

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10 of 11 found this helpful

EHHHHH

GrandAm84 from Wisconsin on 1/13/2008

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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

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37 of 109 found this helpful

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Pros:

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<< >>

More details on the Rockford Fosgate RFK4X

Mark G.

Product Research

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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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
good brand, plus had more speaker wire [ Tom  Aug 15, 2019 ]
A
Rockford Fosgate makes quality stuff so I wanted only the best for my new system I have all the best parts and now soon the best wire to go with it Might as well Why skimp on wiring when spent a fair amount of money on the other parts ( speakers , amp, sub, tweeters)?? [ Catherine  Jan 05, 2019 ]
A
How can you really go wrong with Fosgate anything!!! This is a product that stands for quality. [ Jesse  Dec 27, 2018 ]
A
It was recommended for the amp [ MARK W.  Dec 01, 2018 ]
A
I have a Rockford Fosgate PUNCH Amp that I bought a couple years ago & just now getting around to hooking it up. Crutchfield makes it easy to research what you need from home & pick out exactly the item you need. [ COLBY  Nov 03, 2018 ]
A
Love all my Rockford Fosgate stuff [ LOGAN  Sep 06, 2018 ]
A
I picked these items from crutchfield because of good prices and rockford fosgate is the best can't get no better been bumping fosgate since high school . [ Jesica  Apr 25, 2018 ]
A
Because its Rockford, nuff said [ Devin  Apr 11, 2018 ]
A
Straight 4 & 4 gauge, long length, The Bigger package was 4&4 and 8&8 if it was 44 and 44 and not shorter length i would have bought that [ Roger  Apr 07, 2018 ]
A
Most amount of wire per 4gauge wire set. Good reviews online. I trust Rockford fosgate [ mitchell  Feb 24, 2018 ]
A
The distance from my subwoofer Amp to battery required a 4 gauge wire. [ John  Dec 24, 2017 ]
A
Great price. High quality wires and fuse holder! Very easy to use for install! And great reviews from other customers [ Justin  Oct 24, 2017 ]
A
rocky recommended [ michael  Oct 10, 2017 ]
A
Suggested for amp [ Richard  May 18, 2017 ]
A
gotta have cable [ jaykub  Mar 12, 2017 ]
A
sub install [ DALE  Nov 25, 2016 ]
A
includes additional warranty period with Rockford Fosgate on my amplified [ Carroll Lewis  Nov 15, 2016 ]
A
4 Guage amp wiring it to get the power I need to where I need it [ Andrew  Nov 14, 2016 ]
A
Brand name and quality [ Jeremy  Oct 30, 2016 ]
A
I have used this in previous installs [ shaun  Sep 16, 2016 ]
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Too of the line product [ Wanda  Jun 15, 2016 ]
A
Bought this to run subs in my 05 Cobalt SS [ Ethan  Jun 05, 2016 ]
A
Trusted brand [ Winston  May 28, 2016 ]
A
It was the cheapest option that offered a complete amp wiring kit with speaker wires. [ Joseph  May 17, 2016 ]
A
trusted brand, good reviews, discount pricing [ jay  May 08, 2016 ]
A
It added a warranty on the equipment. [ Lanell  May 06, 2016 ]
A
Great products from Rockford Fosgate, used them previously in my G35 coupe using the mutli-channel setup. [ jorey  Apr 16, 2016 ]
A
Complete package of what you need forthe wiring. [ Ricardo  Mar 28, 2016 ]
A
i need a wiring kit and trust Rockford above all else! [ CHRISTOPHER  Mar 07, 2016 ]
A
Good brand [ Douglas  Dec 23, 2015 ]
A
Good price for all needed items. [ Troy  Dec 16, 2015 ]
SHOW MORESHOW LESS

2 questions already asked

Q
What power can this power cable handle?
[ Peter  Feb 04, 2018 ]
1 answer
A
If you need help determining the wire gauge you'll need for your amplification, check out our wire gauge chart and formula on the website here: https://www.crutchfield.com/learn/learningcenter/car/cable_gauge_chart.html?search=gauge For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service: https://www.crutchfield.com/support/ContactUs.aspx
[ Ryan  Feb 12, 2018 ]  Staff
Q
This kit comes with one "set" of RCA cables that would only work for the front/rear speakers. Does a kit come with two RCA cables?
[ Eric  Feb 10, 2016 ]
2 answers
A
All amp kits, as far as I am aware, only come with a single set of RCA wires. ....an extra pair of RCAs is cheap and Crutchfield will take care of you:-)
[ Barton  Feb 11, 2016 ]
A
By set it means 2 lines...which is 1 pair...it would run either the sub rca input...the left and right of front...or the left and right of rear...if it's a mono channel amp you don't need another cable set...if it's a multi channel amp you will need to by another cables set
[ Homer  Feb 10, 2016 ]

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