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Rockford Fosgate RFK4I

4 Gauge Power and Signal Installation Kit

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List price $119.99

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$69.99

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Arrives by Thursday, May 7 to zip 20147

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Product Features:
  • 4 Gauge Power and Signal 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. 20ft. Twisted pair of RCA
  4. Maxi fuse holder and fuse
  5. 20ft. Remote wire
  6. 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".
No
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
77%
4 Star
23%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.9
Value
4.7
Features
4.4
Design
4.8
Usability
4.8
turkey

pt, mo

Overall
Durability
Value
Features
Design
Usability
true

October 2, 2011

I love this wire it's so much better than my old 4 gauge wire. I put it next to the 4 gauge i bought from a local audio store and the rockford wire was twice as big and way more flexible. Everything in this kit is amazing and it is def worth the price.

9 of 14 found this helpful

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Ryan

Eugene, OR

Overall
Durability
Value
Features
Design
Usability
HIGH QUALITY! GREAT BUY!

May 24, 2011

Great Great Deal! RF's Cables are nice!

Pro:
Really Flexible
Price
HIGH HIGH QUALITY CABLES (i was surprised.)
It looks like licorice. (seriously!) :)
Pre-Attached Fuse Holder and Terminals

Cons:
A different fuseholder would be nice because it just sticks out and was more of a hassle to try and get it in.

10 of 18 found this helpful

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Alex

Pittsburgh, PA

Overall
Durability
Value
Features
Design
Usability
amp install kit

April 20, 2011

very nice kit for the price paid. wire is extremely flexible for gauge. power wire is long enough to go from battery at the front of the engine bay, through the firewall, under dash, under the carpet, down transmission tunnel, under rear seats, into trunk and still have 2 feet to spare. this was done on a 93 chevy beretta, so bigger sedans and suvs may need more wire. i'm very pleased with this kit and would buy again

7 of 12 found this helpful

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Leon

Shiprock, NM

Overall
Durability
Value
Features
Design
Usability
Rockforf Fosgate 4 Gauge Kit

March 30, 2011

This is a nice kit... True 4 gauge... really easy to work with.... really flexible... all in all a great product...

4 of 6 found this helpful

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Brandon

Columbia, MO

Overall
Durability
Value
Features
Design
Usability
Great Quality

December 21, 2010

I bought these to power an RE SE-X 15 hooked up to a Sundown amp at about 800 RMS. Let me tell you, these cables are GREAT quality. Definitely 4 AWG wire, and plenty of it, enough for me to cut off extra and use it for a "big 3" upgrade. Wires are very flexible. RCA cables are high quality. Im gonna use home stereo speaker wire for my setup so this was perfect. Only flaw is the fuse. Because the fuse-holder uses a MAXI fuse which is very large, it sticks out the side of the fuse holder. Although, this makes for easy inspection of the fuse. Overall a very clean and high quality kit.

4 of 6 found this helpful

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john

santa rosa CA

Overall
Durability
Value
Features
Design
Usability
great!

June 27, 2010

i love this amp kit! would be awesome for the price if it would have speaker wire but i already had some so it is all good. anyways it powers the system so I'm happy

5 of 8 found this helpful

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Chris

Ogden Utah

Overall
Durability
Value
Features
Design
Usability
awesome

June 26, 2013

This amp kit is awesome! very thick pure copper wire. runs very clean, power keeps my system knockin. the fuse holders a lil tricky.. overall would recommend 10 times to anyone. Great price as well

8 of 15 found this helpful

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Monte

Mount Vernon, WA

Overall
Durability
Value
Features
Design
Usability
Great Value!

March 2, 2011

I wanted to install my own sound system in my Dodge Dakota and wanted to do it right. I bought this kit based on other reviews and because of the quality Rockford is known for. After getting this kit and using it, I can say it's all very high quality. I have been using my system now for over 6 months, no issues!

3 of 5 found this helpful

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Streva

Brazil

Overall
Durability
Value
Features
Design
Usability
Great Product

October 11, 2010

Easy to install + high quality components for a basic setup.

2 of 3 found this helpful

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Chris

Madera, CA

Overall
Durability
Value
Features
Design
Usability
Rocford Rocks

October 4, 2010

The kit comes with everything. The wire is all super flexible, so it is easy to fit in tight places in you're vehicle.

2 of 3 found this helpful

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DJMJ

Chicago, IL

Overall
Durability
Value
Features
Design
Usability
Great Kit. Good Value

August 11, 2010

Installed in a 2007 Chevy Trailblazer SS and a Pontiac Torrent. All wiring was long enough to reach the rear tray nicely and the quality was great. Everything I needed to get my MTX amps and Alpine subs bumping again was in the kit. Did need more zip ties but those are cheap. Sounds great and better than the low grade CCA autopart store kits for a similar price. If you are debating price versus quality this is a clear winner in both categories. Signal RCA's didn't look too robust but have not had any issues.

2 of 3 found this helpful

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ANT

Bay Area

Overall
Durability
Value
Features
Design
Usability
NICE

February 28, 2013

Good amp kit. Includes everything thing you need.
Real 4 Guage wire!

8 of 16 found this helpful

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Greg

Farmington, MO

Overall
Durability
Value
Features
Design
Usability
Excellent car audio power cable

December 29, 2012

Excellent product. Easy to work with. I bought two sets so I could wire a four channel amp and have extra power wire to do a "big three" wire project under the hood. Highly recommended.

6 of 12 found this helpful

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Blue silk

Corona, ca

Overall
Durability
Value
Features
Design
Usability
Great product

April 9, 2012

Never had any problems with this product and if I get a new car I would not settle for less.

7 of 14 found this helpful

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Clean car & a subwoofer

GIG HARBOR, WA

Overall
Durability
Value
Features
Design
Usability
Great value & fast shipping!

December 20, 2011

Very good 4 guage wire, pretty much everything what you need for a subwoofer amp wiring... very pliable wire, easy to hide under the carpet. I hook it up to a friend of mine, no sweat :) Sonic has a good deal compare to other retailers. I you've got extra cash, take kicker, the blue one. It is thicker and silver tinted... the one im using right now. :)

6 of 12 found this helpful

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Drew

Grand Junction, CO

Overall
Durability
Value
Features
Design
Usability
Rockford Fosgate RFK4I

November 5, 2010

I purchaced these cables a while back to upgrade with more power and work great seller got them to me wery quick and works great. And best price I could find. Lot better than local store. These guys are the real DEALS!!!

2 of 4 found this helpful

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Toby

Little Elm, TX

Overall
Durability
Value
Features
Design
Usability
Amp Wiring Kit

October 14, 2010

This kit did exactly what I needed it to so I could hook up my amp. There is plenty of cable to run from the battery all the way to the back of the car and all the needed accessories are included. I would highly recommend this kit.

4 of 8 found this helpful

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Tyler

Evergreen, CO

Overall
Durability
Value
Features
Design
Usability
RFK4I

August 18, 2010

this wiring kit was perfect. high quality wire and more than enough length for my 4runner with the amp all the way in the back. i would definitely recommend this kit to anyone

1 of 2 found this helpful

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Jay

Easton, PA

Overall
Durability
Value
Features
Design
Usability
Its wire hehe

February 21, 2010

Well nice and easy to install, downfall of it all is the price and an ok fuse holder.

1 of 2 found this helpful

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Jim

Oakland, CA

Overall
Durability
Value
Features
Design
Usability
Hey I got RF Amp Kit

January 22, 2010

OK, got this in today and i ordered it yesterday So Great Shipping and Very Fast, but the wire seems to be under spec and it doesn't stand up to their 4 awg claim, the wire i got at a audio store for cheaper had more copper then this kit, maybe its just this kit, that doesn't stand up to the specs because it is the cheaper one of RF Kits, but for 54$ bucks it is a good deal, the wire is very flexible and very easy to fit in tight places, and i would recommend it to first time installers because, it can make it a lot easier for you, but to other installers look else where, With this kit your just paying for the RF name

1 of 2 found this helpful

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Leotorres

Mentor

Overall
Durability
Value
Features
Design
Usability
Excellent

September 19, 2013

It is working pretty well. This brand is the best on wires, so No complains

8 of 17 found this helpful

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Dustin

Green Bay, WI

Overall
Durability
Value
Features
Design
Usability
High quality cable!

April 1, 2013

Excellent product! The positive wire was ready to install right away with no crimping involved. Just had to drill the hole a little larger. The cable is very flexible, durable and is true to it's size rating! Rockford Fosgate did a great job in producing a quality product.

6 of 13 found this helpful

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Motorhomeguy

Rochester, MI

Overall
Durability
Value
Features
Design
Usability
Great little unit

February 9, 2013

The unit is exactly as advertised and makes a great small package sub for any car where space is an issue. It was easy to install and works great - I installed it in a 34 foot motorhome and I could have used a little more power, but it does the trick and I am satisfied.
Pros: ease of installation, size and appearance
Cons: could use a little more power

6 of 13 found this helpful

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Nuremberg

New York

Overall
Durability
Value
Features
Design
Usability
Rockford Fosgate RFK4I Review

September 20, 2012

All i can say is wow. Unbelievable power delivery and a crisp clean signal with no distortion or signal loss issues. RF has always been amazing with their products and this kit just adds to that reputation.

8 of 17 found this helpful

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Exavier

Deltona, FL

Overall
Durability
Value
Features
Design
Usability
Excellent qaulity.

June 12, 2012

Excellent product. Great build quality. True to Gauge. NO B.S. specs. The fuse holder is a little tricky.

6 of 13 found this helpful

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Jim

Salt Lake City, Utah

Overall
Durability
Value
Features
Design
Usability
Good Wires

April 2, 2012

Good wires, i like them. They do a good job. They are a lot of money but you get what you paid for, cant go wrong with Rockford products.

7 of 15 found this helpful

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Jace

Sacramento, CA

Overall
Durability
Value
Features
Design
Usability
Awesome!

March 27, 2012

like most said the fuse holder was awkward and a little tricky.. but besides that everything is great!

8 of 17 found this helpful

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Rob

Canada

Overall
Durability
Value
Features
Design
Usability
Good Deal!

February 9, 2012

Good quality at a good price, shipping was good and quick as well.

6 of 13 found this helpful

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Nick C

Arkansas

Overall
Durability
Value
Features
Design
Usability
Rockford Wire

December 29, 2011

I highly recommend this wire kit! I have it hooked up in my 99 chevy silverado with a kenwood 9105d and JBL GT5s in a sealed box and it's amazing. The wire is defintly full 4 guage. Not copper over aluminum like most cheap brands are. A 4 guage copper over aluminum is like 8 guage true copper. Having proper wire is essential to reaching maximum ability of your amp. If your amp cannot receive the full amount of power then it will overheat and stop working. A good wire kit is a safety investment in your car audio. This is a great kit for the price. Everything you need to hook your amp up. You get what you pay for. Don't get cheap wire and risk your amp, subs, and car battery. Overall great kit and would recommend friends buying!

3 of 7 found this helpful

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clean car & a subwoofer

GIG HARBOR, WA

Overall
Durability
Value
Features
Design
Usability
great value

December 22, 2011

I already have 3 of these, they are the best product for the money! Take it from sonic, fast shipping too! I like the maxi fuse holder and all the terminal rings included.

6 of 13 found this helpful

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dominic

Roswell, NM

Overall
Durability
Value
Features
Design
Usability
best wire

August 23, 2011

There is no substitute for this wire this is the quality stuff a competition system needs. I want all fosgate for my wires and RCA's.

3 of 7 found this helpful

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boogie man

ga

Overall
Durability
Value
Features
Design
Usability
quality product

July 26, 2011

I'm no car audio buff but this works fine for me.

2 of 5 found this helpful

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Tomas

Davis, CA

Overall
Durability
Value
Features
Design
Usability
Works good

June 19, 2011

No problems with it, works perfect still after about 5 months.

2 of 5 found this helpful

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POLARBEAR805

SANTA PAULA, CA

Overall
Durability
Value
Features
Design
Usability
GREAT WIRING KIT

December 20, 2010

This kit works great. I used it to power my alpine 1000 watt amp. Easy to install. Don't waste your cash on cheap kits from w*****.

1 of 3 found this helpful

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Jarred

Garden Grove, Ca

Overall
Durability
Value
Features
Design
Usability
great quality!

August 29, 2010

These wires are awesome...The quality is great and it really utilizes all of your amp's true potential power.

1 of 3 found this helpful

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Vic

Vail, AZ

Overall
Durability
Value
Features
Design
Usability
RF 4 gauge

June 19, 2010

This product is great. Just got it in the mail. One of the things is that the Rockford wiring is very nicely insulated, most people wont see that. Its very flexible. They give you a honest product with 1600+ strands in that copper wiring.

3 of 7 found this helpful

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Felly

SF

Overall
Durability
Value
Features
Design
Usability
Best

May 29, 2010

Had off brand, kicker, etc. Nothing lives up to rockfords wires. Measured and it is 4awg power and ground. Not thick insulation and powered my 2 kenwood kac-904d perfectly. 1800 watts was a little much for 4awg but anything under 1500 would work great.

1 of 3 found this helpful

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Bond

Bloomington, IL

Overall
Durability
Value
Features
Design
Usability
Good Wire

May 10, 2010

I got this for 2 12" inch 1200 watt Sony Xplods. But anyways this wire was a charm and haven't had any problem with it.

1 of 3 found this helpful

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Fosgate

Chicago, IL

Overall
Durability
Value
Features
Design
Usability
Greatest For The Price

April 6, 2010

I purchased this product from B*** B** and i paid twice as much. I wish i would have purchased it at Sonic Electronix for half the price!!!!

Overall, it is a great kit. came with everything but speaker wire, but it was thick enough and it powers my 1000 watt RMS amp.

1 of 3 found this helpful

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Frank

Tulsa, OK

Overall
Durability
Value
Features
Design
Usability
Hmmm...not ENOUGH

February 9, 2010

So i got this kit because its RF and 4 AWG, sounds good to me, but it didn't have all the terminals necessary for complete amp installation. Overall its an alright kit, but i would recommend spending a little more on a higher end wiring kit.

1 of 3 found this helpful

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erik

Sunnyvale, CA

Overall
Durability
Value
Features
Design
Usability
Good Amp Kit

April 15, 2009

Everything was good except no speaker wires.
High quality wiring and insulation.
Highly recommended.

1 of 3 found this helpful

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piyush

Canada

Overall
Durability
Value
Features
Design
Usability
amazing amp kit

April 30, 2014

really flexible and bendy and performs much better than anything else

7 of 16 found this helpful

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sharma

Canada

Overall
Durability
Value
Features
Design
Usability
top quality

April 13, 2014

just recieved these a couple days ago and compared it to my other 4 gauge kit from stinger, the difference is insane. this stuff is amazing soooo soft and bendy even better than licorice. none of these other brands that make amp kits come even close to the quality and performance of rockford.

5 of 12 found this helpful

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Kile

Burlington, CO

Overall
Durability
Value
Features
Design
Usability
I liked it

August 20, 2013

I would recommend this product to anyone installing an amp. The power and ground wires are really nice quality wires. The whole kit is just a nice put together kit. Love it

5 of 12 found this helpful

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dferg1

Rock Hill, SC

Overall
Durability
Value
Features
Design
Usability
Speedy Shipping!

June 27, 2012

Sonic always ships there products out very quickly. They are my favorite so far, and I have delt with other e-bay stores. This product does exactly what is listed. You won't be disappointed. I know I was'nt.

6 of 14 found this helpful

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Devante

Rembert, SC

Overall
Durability
Value
Features
Design
Usability
best thing i ever bought

September 1, 2011

Very flexible wires easy to put the fuse in only down side that i dont like is how big the fuse holder is and that the fuse sticks out like it does but other than that very great product wouldn't think about buying anything otha kind specially for this price fastest shipping ever

1 of 4 found this helpful

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Stanley

Ventura, CA

Overall
Durability
Value
Features
Design
Usability
Great Wire Kit

June 28, 2011

The quality of Rockford Fosgate is undeniable. These wires deliver the power I need with no problem at all. System has a crisp clear sound and I am very satisfied.

3 of 8 found this helpful

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Jeff

Bradenton

Overall
Durability
Value
Features
Design
Usability
Good quality. Not a complete kit though

September 23, 2010

This kit only came with ring terminals for one end of the wire. It would be nice if it included a terminal for the other end of the cable!

1 of 4 found this helpful

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Accessory Tools and Products

Accessories added

NVX V Series RCA Audio Interconnect Cable

V-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

Your Price $11.99

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 $16.99

Browse 3 questions and 13 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I trust these kits to have everything I need to complete and install and the wire is always AWG
dominic s on Mar 30, 2015
100 percent copper power wire ensuring no lost electrical load from battery to amp
Cody G on Dec 9, 2014
I know I'm getting quality wires
Marcus B on Dec 19, 2014
because Fosgate is #1 when it comes to power
mark g on Oct 14, 2014
When it says its for systems up to 1000 watts, does that mean rms? Ill be pushing 800 watts rms and 1600 watts peak with 80 amps, so will this kit be alright because of the 100 amp fuse?
Thanks
Joe D on Mar 2, 2015
Best Answer: the short answer, yes you will be alright. the long answer, yes it will be alright because of the capacity of the wire will tolerate up to 100 amps/1000 watts without trouble. you always want to pick the size of wire and fuse to how much power your system needs, an example is my system, I have a 3 amp setup in my car (2 T400-4 and 1 T1500-1bdcp) the t400's have a 100 amp fuse each and the T1500 has a 200 amp fuse. so in total my system requires 400 amps/2300 watts to run at full capacity but 4awg wire cant handle that much amperage draw so I upgraded to 0AWG wire that can handle up to 500 amp currents and sustain my voltage during competitions. here is a good article to read, http://knowledge.sonicelectronix.com/car-audio-and-video/car-amplifiers/what-gauge-wire-do-i-need-for-my-amp/
Reply · Report · dominic s on Mar 3, 2015
· Add Answer · I Have This Question Too (0)
Will it be thick enough for the Hifonics Brutus X1500.1d ? Or should I go for 0?
Eliav E on Sep 5, 2014
Best Answer: I would suggest using 2 or 0.
Im currently using this kit on a RF T500 @ 1Ohm.
Which according to the birth sheet, is around 800 watts.
Reply · Report · Michael M on Sep 5, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

RFK4I

UPC

780687325527

Weight

5.00lbs

Internal SKU

rfk4i

Internal Product ID

9894

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 RFK4I