Rockford Fosgate RFK8i

8-gauge amplifier power and signal wiring kit

Item #: 575RFK8I

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33 Reviews

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This wiring kit does not include speaker wire, so you'll need to purchase that separately to complete your amp installation. This kit includes patch cables for a 2-channel or mono amp — you'll need to add cables for multi-channel amps.

Your amp needs big power wires in order to deliver top performance to your sound system. Rockford Fosgate's RFK8i amplifier power and signal wiring kit supplies everything you'll need to send power and input signals 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.

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
  • one 20-foot twisted pair RCA patch cable
  • AGU fuse holder and 60-amp fuse
  • assortment of wire termination hardware and cable ties
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

Download owner's manual

  • 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)
  • 16' Twisted pair RCA patch cord
  • 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

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

Product Research


General Overview: This is a single amplifier wiring kit that includes the power and ground cables, turn-on lead, one pair of stereo RCA cable and accessories required to install one amplifier. Speaker wire is 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 fuse holder attached to the power cable comes with a 60-amp AGU-type fuse.

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

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.

Rockford Fosgate RFK8i Reviews

Average Customer Review:

33 reviews
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Quality wiring kit

Written By Scott S, Riverton, WY on Monday, March 23, 2015

Crutchfield Customer Review (What's this?)

I purchased this to wire up a new powered subwoofer in my 1994 Bronco. I'm glad I did, this is an excellent kit with everything that I needed. Great quality.

Pros: Quality

Cons: none

Works but...

Written By Kenn S, Wisconsin on Wednesday, March 11, 2015

Crutchfield Customer Review (What's this?)

Nice kit but the power cable came up a bit short in my 2-door hatchback (specific routing in the engine bay, I wasn't wasteful) You would think 17 feet would be enough but alas, it wasn't. Crutchfield came to the rescue though and sent me nearly 6 more feet when I only asked for 2-3.

Rockford Fosgate RFK8i

Written By Your MOM, Mount Shasta, CA on Tuesday, February 17, 2015

Crutchfield Customer Review (What's this?)

This product was very easy to install everything it said was there, were there the only problem is nothing was gold plated. I did a search in google to find gold plated rca cables. it brought this product up and it was hard to see if they were gold plated, turns out they are not, otherwise it is a great product.

Pros: quality product, easy to install, looks good

Cons: not gold plated, RCA cables seem a bit cheap

Rockford Fosgate RFK8i

Written By Francisco, Miami Springs Florida on Tuesday, August 12, 2014

Crutchfield Customer Review (What's this?)

This kit for installation for amplifier is very good.


Written By khanikun, APO AE on Monday, August 11, 2014

Crutchfield Customer Review (What's this?)

It's okay

Pros: Makes wiring easy. No piecing together a wiring setup for your audio setup.

Cons: The signal cable is way small. It's nice a long, but I could have just used cheap speaker cable for the signal cable.

fosgate RFK8i

Written By Dustin, United States on Friday, May 23, 2014

Crutchfield Customer Review (What's this?)

Great for my 600 watt amp install

Cons: No speaker wire

Wiring Kit

Written By RFK8i Wiring Kit, Harvey, LA on Tuesday, October 08, 2013

Crutchfield Customer Review (What's this?)

Nice kit, worked great on installation

Pros: Works great

Cons: None

RockFord Fosgate RFK8I

Written By Ken, Santa Rosa Ca on Sunday, September 08, 2013

Crutchfield Customer Review (What's this?)

you will need this if you want to add some Thump to your system all in one kit Very Nice.. Im glad i got this...

Pros: has everything you need

Cons: none

Exactly as advertised!!

Written By Anonymous, Wisconsin on Wednesday, July 31, 2013

Crutchfield Customer Review (What's this?)

This was exactly as advertised! The rep I spoke to recommended it, and it came through in flying colors. Easy to install.

Pros: Easy install, great instructions

Cons: None.....

Just what I needed!

Written By Dave C, Currituck, NC on Tuesday, July 23, 2013

Crutchfield Customer Review (What's this?)

This is a great amp wiring kit. It was just what I needed.

Pros: Great kit!

Cons: The fuse holder was broken.

Rockford Fosgate RFK8i

Written By Anonymous, Kenosha, WI on Saturday, April 27, 2013

Crutchfield Customer Review (What's this?)

An amazing product plenty of wire to reach everywhere.

Exactly what i needed!

Written By Kenny, texas on Saturday, March 09, 2013

Crutchfield Customer Review (What's this?)

more than enough mateerials, high quality!

Pros: Everything you need for cheap and high quality

Cons: None

I Can Recommend This Product

Written By ZLH, Aurora, CO on Thursday, December 15, 2011

Crutchfield Customer Review (What's this?)

There really isn't anything overly bad that I can say about this installation kit. The wires and cables seem to be high quality and work fantastic. I do have to agree with other reviewers in the fact that the power wire could be longer (probably by a minimum of three more feet). I would like to give the product four stars instead of five because of this but it wouldn't be fair; I purchased it knowing that the wire is only 17 feet long and that it would be a slightly tight fit. It did, fit, however (it's in a 2000 Honda Accord 4dr, if you're wondering). I can definitely recommend this product.

Pros: The quality of the components.

Cons: The mounting bracket for the fuse seems flimsy, and the first one I received was done so in a broken form. Crutchfield did replace this with no questions asked, however.

Great Kit!

Written By Andy, Appleton, WI on Wednesday, October 05, 2011

Crutchfield Customer Review (What's this?)

Great kit, came with everything i needed for my bass package install and head unit. Power wire is easy to hide and snake through tight places.

Rockford Fosgate RFK8i

Written By Casey, HI on Thursday, September 22, 2011

Crutchfield Customer Review (What's this?)

Wiring package worked out great. If wires are too long, do not leave coiled up; they may cause resistance or buzzing sounds to your unit.

Top quality!

Written By Steve H., Saxton, PA on Thursday, June 30, 2011

Crutchfield Customer Review (What's this?)

Has all you need to hook up amp, thanks Rockford and Crutchfield!

Good product

Written By Mark, Westerville, OH on Thursday, June 30, 2011

Crutchfield Customer Review (What's this?)

Good quality cable and fuse holder. I ran out of length on the power cable. Be sure to measure. Large SUV's probably need a 20-25 ft power cable.

Wire Kit

Written By JD, Jackson, TN on Monday, June 20, 2011

Crutchfield Customer Review (What's this?)

I was very glad to have this kit. The power wire could be just a tad longer though.

High Quality Connection

Written By Larry K, Howell, Mi on Thursday, May 26, 2011

Crutchfield Customer Review (What's this?)

Since being in school for electrical engineering I'm always looking for the best quality I can find for my systems. Rockford Fosgate shines through again with this great wiring kit!

Very high quality power cable that is durable yet flexible making it easy to hide away in the increasingly more difficult to wire up cars of today.

Great RCA cables with a solid connection, no interference whatsoever.

Kit came with everything I needed and I can say it all came out great, plenty of power for my 600Watt amp pushing 1 sub at 2 ohms stable.

Rockford Fosgate RFK8i

Written By Chet, MA on Tuesday, May 17, 2011

Crutchfield Customer Review (What's this?)

this wire is premium quality and easy to work with.

Rockford Fosgate RFK8i

Written By Hawkins, Clarksville, TN on Tuesday, February 22, 2011

Crutchfield Customer Review (What's this?)

Great product and perfect for a mid range power amp.

Rockford Fosgate RFK8i

Written By MichaelW, Gainesville, FL on Monday, November 22, 2010

Crutchfield Customer Review (What's this?)

Outstanding in every way. Well engineered and designed. I did not receive the
assortment of connectors that is pictured, though I had what I needed for the job. The
insulation on the RCA cord and power cord are soft and supple making routing a breeze.
It is a bit expensive, especially compared to alternative products. But if you're the type
that doesn't mind paying for the best, you won't be disappointed.

Solid Wiring Kit :)

Written By Lino, Chicago on Monday, November 08, 2010

Crutchfield Customer Review (What's this?)

Guys, if you are looking for an 8 gauge wiring kit, this one will provide for
all your power needs. It comes with everything you need. The power and ground
cables are excellent. The overall quality is excellent. Both ground and power
cables are very flexible and is very easy to handle during installation. I
highly recommend you buy this if you are looking for an 8 gauge kit. I rate this +5

very good

Written By Anonymous, cathlamet,wa on Saturday, July 31, 2010

Crutchfield Customer Review (What's this?)

this is a great kit! i'm very happy i went with it over some of the cheaper ones out there.

Great Kit

Written By Mark, MO on Wednesday, January 20, 2010

Crutchfield Customer Review (What's this?)

The kit has everything you need for an easy amp installation

Just get it!

Written By Eric, San Mateo, CA on Friday, September 25, 2009

Crutchfield Customer Review (What's this?)

You bought an amp, you NEED THIS! Period. It includes everything to wire your new amp properly. Without this kit it would have taken me twice as long, easy, to have gotten all my cables sorted and connections just right. Everything I needed was here. Everything. Did I say that enough? Everything. (Besides tools)

Rockford Fosgate RFK8i

Written By Jeffrey, Colorado on Friday, April 17, 2009

Crutchfield Customer Review (What's this?)

Best wires your going to get. Buy the kit and do it right.

Rockford Fosgate RFK8i

Written By Michael, Lancaster, PA on Saturday, February 21, 2009

Crutchfield Customer Review (What's this?)

Glad I spend a few extra bucks for this kit. Biggest driver for me was getting something economical that had a common type of fuse. No issues with install. Came with more than enough connectors and accessories.

Rockford Fosgate RFK8i

Written By Keith, Clayton, NJ on Monday, February 09, 2009

Crutchfield Customer Review (What's this?)

very good quality, but should include spade connectors for the power and ground wires, it only includes one for the remote wire

RF quality

Written By Adam, Tuscaloosa, AL on Sunday, September 28, 2008

Crutchfield Customer Review (What's this?)

The wire in this kit is very flexible and easy to push through grommets and pull through small spaces. The strand density is top notch too. Wire length is more than enough for full size suv's unless you're wasteful. No speaker wire is included and the miscellaneous connectors are much fewer than indicated in the pictures but I didn't need any. The fuse is a more readily available design compared to other kits and that was the main reason I purchased it.

Rockford Fosgate RFK8i

Written By Bryan, Vancouver, WA on Saturday, July 12, 2008

Crutchfield Customer Review (What's this?)

This has some good heavy wire and just about everything you need. In the "What's In The Box?" caption it lists a bunch of misc. connectors that you can use for speakers and some other wiring. Well I
had hoped this product had those speaker connections but it only came with one. Now I have
to go to the store and get several. Also, ended up pulling apart the 60A fuse because it's such a tight fit. Just a couple of set backs.

Well Worth The Value!

Written By Layne, Kansas on Friday, June 20, 2008

Crutchfield Customer Review (What's this?)

This amplifier
wiring kit is well
worth the money!
This kit was
unbelievably better
than the wiring kit
I owned before. If
you can afford
spending a little
bit more for this
rockford fosgate
kit, do it. You
will not be

Great package

Written By Todd, Michigan on Saturday, March 15, 2008

Kit comes with everything you need. Nice quality cable. The fuse is a normal inline fuse so if it blows you just replace it with a fuse at a local retail store, no need to order a special fuse. Would be nice if they would of included a spare fuse, but no biggie. Also no speaker wire included.

I have this hook up to an Alpine M450 pushing 400watts to a JL 10w3v3 at 2ohm and works fine.