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Rockford Fosgate RFK8

8-gauge amplifier power wiring kit

27 Reviews | 1 question - 1 answer


Our take on the Rockford Fosgate RFK8

This wiring kit does not include speaker wire or patch cables. You will need to purchase those separately, in order to complete your amplifier installation.

Your amp needs big power wires in order to deliver top performance to your sound system. Rockford Fosgate's RFK8 amplifier power wiring kit supplies everything you'll need to send power to amplifiers with fuse ratings of up to 60 amperes. Rockford Fosgate makes the 8-gauge cable from 100% pure crystal-oxygen free copper wire so you can count on maximum signal transfer.

This kit was already crimped and assembled once I received it! 8-gauge wire is usually hard to crimp but Crutchfield took care of it for me! They even connected the receiver wire to my wiring harness!

Suzanne, Chillicothe, MO

What's in the Box:

  • One 17' Power cable (8-gauge) in a red translucent jacket (has an in-line 60A fuse/fuse holder and a ring terminal on the battery end)
  • 3' Ground cable (8-gauge) in a translucent gray jacket (with a ring terminal on one end)
  • 20' Turn-on lead in a blue jacket
  • Ten 4" wire ties
  • 1 Plastic grommet
  • 3 Plastic butt connectors
  • Female quick slide connector
  • Male quick slide connector
  • Ring terminal
  • Small red rubber boot
  • Large black rubber boot

Product Highlights:

  • amplifier wiring kit
  • cables meet or exceed the American Wire Gauge specifications and requirements
  • 17 feet of 8-gauge power cable
  • 3 feet of 8-gauge ground cable
  • 20 feet of 18-gauge turn-on lead wire
  • AGU fuse holder and 60-amp fuse
  • assortment of wire termination hardware and cable ties
  • warranty: 1 year
  • Our 60-day money-back guarantee

Rockford Fosgate RFK8 Reviews

Average Customer Review(s):

(27 Reviews)

Wires not long enough for SUV

Matthew from Wyckoff, NJ on 6/21/2017

The length of wire was not sufficient to reach from the battery to the trunk of my Highlander. The length of grounding wire was not sufficient as well. I had my car in pieces all over my driveway and needed to put it all back together with an incomplete installation. Very Disappointed. I had it professionally installed the next day.

Pros: perfect length of wire for a Honda CIvic

Cons: Wires not long enough for a proper install in large SUV

Easy install

Suzanne from Chillicothe, MO on 6/19/2017

Crutchfield Customer Review (What's this?)

This kit was already crimped and assembled once I received it! 8-gauge wire is usually hard to crimp but Crutchfield took care of it for me! They even connected the receiver wire to my wiring harness!

Pros: Pre-assembled Power cable perfect length for vehicle

Cons: Ground cable was a little short

Rockford Fosgate RFK8

Shannon from Independence, MO on 6/12/2017

Crutchfield Customer Review (What's this?)

Only other thing needed to wire your RockfordFosgate amp is a little time, knowledge, and patience.

Pros: Everything needed mfg suggests (except RCA) and when purchased with amp RockfordFosgate extends warranty by 1 year!

Cons: The 17ft length was barely enough to go from battery to trunk in 07 Grand Prix.

Rockford Fosgate RFK8

Scott from Fenton, MO on 6/12/2017

Crutchfield Customer Review (What's this?)

Great quality for the money.



Rockford Fosgate RFK8

Anonymous from Rochester, NY on 6/10/2017

Crutchfield Customer Review (What's this?)

It was suggested that I purchase this kit to install my subwoofer in my car and I am glad I did. This kit comes with all the needed power cables to install a powered sub in your car. The kit seems to be of high quality and made my install very easy, I would recommend this kit to anyone .

Pros: High quality wire and connectors in this kit.

Cons: Price is a little more than other kits but this has very heavy duty wire included over other brands.

Rockford Fosgate RFK8

Ryan from Spokane, WA on 5/14/2017

Crutchfield Customer Review (What's this?)

Perfect best 8 gauge wire money can buy



Pounding Bass

Rudy from Layton, UT on 5/10/2017

Crutchfield Customer Review (What's this?)

Works great. No complaints.

Pros: Simple install

Cons: None

Rockford Fosgate RFK8

Anonymous from Jacksonville, FL on 4/3/2017

Crutchfield Customer Review (What's this?)

Professional cable and fuse, with lots of length to spare.



Great price

Randy from Hillsboro, Or on 12/29/2016

Crutchfield Customer Review (What's this?)

Perfect for installing sub with built in amp great quality

Pros: Quality product and great service

Cons: None

Rockford Fosgate RFK8

Anonymous from Grand Rapids, MI on 12/21/2016

Crutchfield Customer Review (What's this?)

Great product.



Rockford Fosgate RFK8

Melissa from Decatur, TN on 11/1/2016

Just what we needed to complete the installation!!! worked Great!!!



Great kit

Brian H. from Boiling Springs, SC on 10/5/2016

Crutchfield Customer Review (What's this?)

This is a great kit for the money ! All the parts are quality made and look great.

Pros: Quality parts, looks great


Great power corn

Brian from Port Washington, WI on 10/3/2016

Crutchfield Customer Review (What's this?)

This is all you need to get an amp or powered sub gong!

Pros: Simple

Cons: Nkne

works well

Anonymous from Louisville, KY on 9/23/2016

Crutchfield Customer Review (What's this?)

Good quality materials and works perfectly.



Power Wiring Kit

Robert from Lakewood, CA on 9/23/2016

Crutchfield Customer Review (What's this?)

Installed this wiring into my F150 supercab and had enough cable to run it towards the backseats of my subwoffer. Easy to install kit.

Pros: Great quality and price.


Installation simplified!

Paulo from Waianae, HI on 9/1/2016

Crutchfield Customer Review (What's this?)

Crutchfield knows exactly what to send to simplify your installation efforts. Great product to go with my powered subwoofer.

Pros: Contains the necessary installation components needed to install my powe red subwoofer. It was so easy to install.


Quality control?

Christian from Rutland, VT on 7/16/2016

Crutchfield Customer Review (What's this?)

This package looks good but I noticed looks can be deceiving.

Pros: Looks/feels like quality material.

Cons: Some benefit of having quality, many stranded wire is lost when the wire inserted at the factory is just jammed. Into the fuse holder and crimped down. It weakens the connection and will fail sooner.

Essential Kit!

The Details are all in the Wiring from Milwaukee, WI on 6/10/2016

Crutchfield Customer Review (What's this?)

Originally, I thought that the 8-gauge battery cable provided in the Rockford Fosgate RFK8 wiring kit would be big-time overkill, but now I'm glad we chose it. The kit may be a little expensive, but trying to piece together and assemble all of these components and connectors separately would be a nightmare. The cable is soft and easy to route through the cabin. We were able to run the red positive cable from the battery of our sub-compact hatchback to the cargo area where our powered sub was located with less than 2-feet of wire to spare, so beware of the cable's length. The 3-foot gray ground wire was also a snug fit. We found a good spot to mount the inline fuse holder on the firewall, just behind the battery - no problems there. We used the included turn-on lead wire, running it between the sub and an accessory lead wire that we found in the driver's foot well, to turn our sub on whenever the car is on. My only regret about this kit was that it didn't include speaker wire for use in making high-level speaker input connections. I realize that not everyone needs speaker wire, but Rockford Fosgate does offer a different version of this kit that includes low-level RCA cables - so why not make a version that includes high-level speaker wire too? Anyway, I'm very glad that I bought this kit. And at half-off the price with the purchase of a sub, it's really a bargain. I would highly recommend this wiring kit for anyone installing an amp or powered su

Pros: Almost everything you need in one package.

Cons: "Almost" everything you need in one package.

Rockford Fosgate RFK8

Anonymous from Wisconsin on 11/15/2015

Crutchfield Customer Review (What's this?)

Good product, easy to install and look clean.



Rockford Fosgate Amp kit

AG from Texas on 10/4/2015

Crutchfield Customer Review (What's this?)

This kit was exactly what I need to replace my old amp kit. The length was perfect for my 2010 Chevy Avalanche. I even notice my subs hitting harder then before. The quality is great. I recommend this product . I rate this product 5 stars!

Pros: More juice to amp resulting in way better performance from my subwoofers.

Cons: None

Great product

Teka from Texas on 2/19/2015

Crutchfield Customer Review (What's this?)

Great wire, great quality, easy to strip and install.

Pros: good stuff.


good kit could be better

Mark W from Wichita, KS on 9/30/2014

Crutchfield Customer Review (What's this?)

good kit. cables were long enough to reach amp in trunk, but the provided connectors were too wide for the amp I purchased. so I had to go to a local stereo shop to get connectors that would work.

Pros: good kit. cables were long enough for my job

Cons: connectors provided were too wide for amp that was purchased

Does not come with everything you need.

Commata from Michigan on 8/5/2014

Crutchfield Customer Review (What's this?)

The components that came with the wiring kit where made of quality products but did not include RCA cables so i had to make an extra trip to get a set, so i would recommend buying a kit that includes everything you need.

Pros: Quality Product

Cons: Missing RCA cables

Great Product

djstaab from Gainesville, FL on 2/19/2014

Crutchfield Customer Review (What's this?)

High end kit at a decent price. Only problem is the kit doesn't come with RCA patch cables (WHY?). I didn't notice this and had to buy some inferior ones locally to continue my install.

Pros: High end

Cons: No RCA's.

RF amp cables

coachts from Granada Hills, CA on 1/14/2014

Crutchfield Customer Review (What's this?)

Excellent quality cable that is extremely thick and heavy duty. It was plenty long enough to run from front to back of my Hummer. Great fuse enclosure.

Pros: Excellent quality Thick protective coating Great fuse enclosure and included fuse.

Cons: No RCA sound cable for subwoofer

Wiring kit

DS from Chagrin falls, Oh on 1/2/2014

Crutchfield Customer Review (What's this?)

have used several of these for other unit installations, good quality material.

Pros: good quality

Cons: price, I mean its just short lengths of wire for crying out loud.

Worth the extra money

johnnybgood from NW Iowa on 11/7/2011

Crutchfield Customer Review (What's this?)

This kit costs a little extra, but is well worth the cost. There's a reason some kits are $20 and others are $50. You get what you pay for and it doesn't make sense to short change your several hundred or thousand dollar system for the sake of $20-$30.

Pros: High quality components

Cons: Cost


Hands-on research

Product Research


General Overview: This is a single amplifier wiring kit that includes the power and ground cables, turn-on lead, and accessories required to install one amplifier. Speaker wire and RCA cables are sold separately.

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, water-tight fuse holder attached to the power cable comes with a 60-amp AGU-type fuse.

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 verify what’s in the box, 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.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I like the quality. [ Darwin  Jun 25, 2017 ]
Needed to properly wire Rockford Fosgate amp and by purchasing together RF extends warranty to 1 year [ Shannon  May 28, 2017 ]
adequate to power the sub I wanted for the price [ Jeremy  May 05, 2017 ]
It was recommended for the Rockford Fosgate powered sub I ordered and I got 25% off the RFK8 when I ordered them together! [ Adam  Mar 31, 2017 ]
Great line of amps and good features [ Michael  Mar 04, 2017 ]
Reviews said it was the best looked at most subs [ Charlie  Feb 22, 2017 ]
Why settle for less? [ MIRIAM  Jan 15, 2017 ]
Bumping junts. [ Phillip  Jan 06, 2017 ]
Reasonable price with the discount for ordering the amp. It is advertised as 100% copper wire. [ Mike  Dec 29, 2016 ]
Quality [ Aaron  Dec 19, 2016 ]
Bought a 4 channel amp and needed a wire kit. Best bang for the buck. [ Lafayette  Dec 19, 2016 ]
needed [ Randy  Dec 17, 2016 ]
the technician said I needed them because the wiring kit does not have them [ Diane  Dec 07, 2016 ]
Bcuz I like them [ David  Dec 02, 2016 ]
You get a 1 year warranty extension on Rockford Fosgate amplifiers if you buy this kit. [ Frederick  Aug 26, 2016 ]
This is my second kit. I used one for my 300 watt JL amp for my subwoofer. [ shawn  Aug 25, 2016 ]
Inline fuse and wire quality [ Peter  Jul 29, 2016 ]
Brand Reputation and Customer and Crutchfield ratings. [ harold  Jun 01, 2016 ]
Great Price! [ Ken  May 22, 2016 ]
price [ Brandon  May 22, 2016 ]
suggested by support [ monique  May 06, 2016 ]
Everything I need in one package! [ Barry  May 02, 2016 ]
Brand [ Walter  Apr 23, 2016 ]
I will be installing this order myself and need the correct wiring. I trust Crutchfield with this selection. [ K  Apr 07, 2016 ]
The reviews are outstanding and it was highly recommended by the Owner. Operator at Rolling Thunder in Middletown, NY. I had a very bad experience with a Kicker product, so it was a no brainer to go with another leader in the industry!! [ LaWanda E.  Mar 30, 2016 ]
Very good for voltage [ Walter  Feb 16, 2016 ]
This is the only right way to hook up an amp [ Janusz  Feb 01, 2016 ]
the tech and the name [ Anita  Jan 23, 2016 ]
Rockford Fosgate makes quality products and you can't go wrong with a Rockford amp. [ STEVEN  Dec 18, 2015 ]
Quality of fuse and 8-gauge wiring combination. Don't need the rest of this package. [ Robert R  Dec 06, 2015 ]

1 question already asked


Looking for more? Check out the next model in this lineup.

Rockford Fosgate RFK8I

Get power and signal cables in one kit:

The Rockford Fosgate RFK8i offers these features:

  • one 20-foot twisted pair RCA patch cable