1.888.955.6000
 
 
1-888-955-6000
crutchfield.com
Crutchfield

Free Shipping on Everything

60-Day Money-Back Guarantee  |  Lifetime Tech Support

Rockford Fosgate RFK4X

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

Zoom
  • Rockford Fosgate RFK4X

    Front

Crutchfield OMC logo
We don't check this item for fit or compatibility.

Item# 575RFK4X offer details

By buying this product you'll earn up to 160 Rewards points.

When you sign up for a Crutchfield account, you’ll be enrolled in Crutchfield Rewards. You’ll earn one point for every dollar you spend on gear from us. You can turn your points into Rewards Cards that you can use toward future purchases. You can sign up for an account now, or after you complete your purchase (you’ll get credit for the points either way).

 
Rockford Fosgate

Our take on the Rockford Fosgate RFK4X

by Buck Pomerantz

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.

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
Shop all Rockford Fosgate Single-amp Wiring Kits
     

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

    Product Research

    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.

     

    Product Reviews

    Review this product
    Great Gear Giveaway rewards card

    Submit a review and you will be entered to win a $150 gift card

    Crutchfield Great Gear Giveaway Official Sweepstakes Rules

    Reviews for the Rockford Fosgate RFK4X

    Average Customer Review:

    7 people say:

    Review this product:

    Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

    Your email won't be visible. Please use the email address that is associated with your order.
    (e.g., JohnD) Your review will be signed using the display name and location
    (e.g., Charlottesville, VA)

    Click on a star to rate the overall product on a scale of 1-5
    1500 characters left
    Attach a YouTube Review
    Crutchfield Video Review Guidelines
    • Only submit videos that you made or are authorized to use.
    • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
    • Please see our Review Guidelines for more information.
    500 characters left
    500 characters left
    Filter by rating:
    Sort by:
    Showing: 1-7 of 7
    View page: 1
    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
    1 out of 1 people found this helpful
    Was this review helpful?    Yes | No
     
    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.
    2 out of 2 people found this helpful
    Was this review helpful?    Yes | No
     
    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 2 people found this helpful
    Was this review helpful?    Yes | No
     
    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!
    29 out of 32 people found this helpful
    Was this review helpful?    Yes | No
     
    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.
    9 out of 9 people found this helpful
    Was this review helpful?    Yes | No
     
    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 102 people found this helpful
    Was this review helpful?    Yes | No
     
    1-7 of 7

    Accessories

    Add accessories for the Rockford Fosgate RFK4X

    The right tools make the job easier. See all categories & accessories

    Metra Crimp Tool and Connectors Package contains crimp tool and over 150 pieces
    6 people say 
    Your Price: $19.99
    Add to Cart
    Metra Crimp Tool Set Package contains light-duty crimp tool and 20 crimp caps
    14 people say 
    Your Price: $9.99
    Add to Cart
    S&G Wire Cutter/Stripper Tool Cuts and strips 12- to 22-gauge wire
    5 people say 
    Your Price: $19.99
    Add to Cart
    S&G Tool Aid 87615 Window and Door Clip Removal Tool
    11 people say 
    Your Price: $7.99
    Add to Cart
    S&G Tool Aid 87650 Door Trim and Panel Removal Tool
    55 people say 
    Your Price: $9.99
    Add to Cart
    Pro.Fit Hook Tool Set Installation tools — pair
    7 people say 
    Your Price: $6.49
    Add to Cart
    Pro.Fit Trim Panel Tool Remove your vehicle's trim panels without damage
    38 people say 
    Your Price: $5.99
    Add to Cart
    Pro.Fit Wire Worm Installation tool helps route wiring through tight spaces
    19 people say 
    Your Price: $12.99
    Add to Cart
    Metra Crimp Caps Package contains 100 crimp caps — for 14- to 20-gauge wire
    12 people say 
    Your Price: $3.99
    Add to Cart
    Spec Tools Stubby Driver Ratcheting driver for tight installations
    2 people say 
    Your Price: $19.99
    Add to Cart
    Skewdriver Pro SPK4042 Ratcheting straight and offset screwdriver set with 40 bits (Skewdriver Pro with ratchet handle, pictured)
    6 people say 
    Your Price: $49.99
    Add to Cart
    Spec Tools SQR-200a Squeeze Wrench Narrow space ratchet kit with 18 sockets
    1 person says 
    Your Price: $49.99
    Add to Cart
    Bojo Trim Panel Tools Set of 3 plastic tools — helps remove interior and exterior trim and door panels
    72 people say 
    Your Price: $11.99
    Add to Cart
    Bojo Trim Panel Tools Set of 6 plastic tools — helps remove interior and exterior trim and door panels
    21 people say 
    Your Price: $24.99
    Add to Cart
    Posi-Products™ Wire Connectors 16 connectors for installing 10- to 26-gauge wires
    4 people say 
    Your Price: $8.99
    Add to Cart
     
    Your Price: $29.99
    Add to Cart
    T-Spec 2-Channel RCA Patch Cables Available in 7 different lengths (20-foot)
     
    Your Price: $20.99
    Add to Cart
    StreetWires Zero Noise 5 Stereo Patch Cables High-performance cables with superior noise rejection (3.3-foot)
    34 people say 
    Your Price: $14.99
    Add to Cart
    StreetWires Zero Noise 5 4-channel Patch Cables Available in 3 different lengths (11.5 feet)
    13 people say 
    Your Price: $49.99
    Add to Cart
    27 people say 
    Your Price: $9.99
    Add to Cart
    Rockford Fosgate RFFM100 MAXI Fuse Pair of 100-amp platinum-plated wafer fuses
    1 person says 
    Your Price: $4.99
    Add to Cart
    Rockford Fosgate RFFM60 MAXI Fuse Pair of 60-amp platinum-plated wafer fuses
     
    Your Price: $4.99
    Add to Cart
    Rockford Fosgate RFF80 MAXI Fuse Pair of 80-amp platinum-plated wafer fuses
     
    Your Price: $4.99
    Add to Cart
    StreetWires AFS Fuses 2-pack (6 sizes available) (100-amp)
    2 people say 
    Your Price: $9.99
    Add to Cart
    StreetWires FB4 4-gauge firewall bushing
    12 people say 
    Your Price: $9.99
    Add to Cart

    Smart people protect with SquareTrade- The best warranty at the best price

    In business since 1999, SquareTrade is the largest independent warranty provider in the U.S.

    100% parts and labor - no deductibles

    All mechanical and electrical failures covered, includes normal wear and tear.

    Your item's repaired or the full item price returned withing 5 days

    Runs concurrent with manufacturer's warranty

    Rated 5-stars by consumers

    For a more in-depth review and enhanced detailed information on the Rockford Fosgate RFK4X, please visit the Crutchfield website product page (/S-orFmn8Wz4ci/p_575RFK4X/Rockford-Fosgate-RFK4X.html ).

    Recommended Accessories See more accessories

    Your featured item

    Rockford Fosgate RFK4X
    Rockford Fosgate RFK4X
    Complete 4-gauge amplifier wiring kit
    Includes patch cable and speaker wire
    $159.99
    In Stock
     
     

    Installation Tools and Shop Supplies

    Metra Crimp Tool and Connectors
    Package contains crimp tool and over 150 pieces
    $19.99
    In Stock
     
     

    RCA Patch Cables

    T-Spec 4-Channel RCA Patch Cable
    $29.99
    In Stock
     
     

    Fuses

    Rockford Fosgate RFFM100 MAXI Fuse
    Pair of 100-amp platinum-plated wafer fuses
    $4.99
    In Stock
     
     

    Firewall Bushings

    StreetWires FB4
    4-gauge firewall bushing
    $9.99
    In Stock
     
     
    Add selected to cart
     
    Find the gear that's right for you
     
    Ask an expert
    Your Crutchfield Advisor knows the gear inside and out.
    Call 1.888.955.6000
     Chat
    Ask an expert

    Compare with other Rockford Fosgate models

    • Rockford Fosgate RFK4X
    • Get all the power and signal wires you need in one kit:
    • 4 out of 5: In Stock
    • The Rockford Fosgate RFK4X includes:
      • one 20-foot twisted pair RCA patch cable
      • 30 feet of 16-gauge speaker wire
    • Add To Cart
      $159.99
    • Rockford Fosgate RFK4
    • Amplifier Wiring Kit 4 gauge Power
    • 4.5 out of 5: In Stock
      • The Rockford Fosgate RFK4 offers:
        • 4-gauge power and ground cables
        • turn-on lead
        • fuse holder w/100-amp fuse
    • Add To Cart
      $114.99
    • Rockford Fosgate RFK4X
    • Amplifier Wiring Kit 4 gauge Power
    • 4 out of 5: In Stock
      • The Rockford Fosgate RFK4X offers:
        • 4-gauge power and ground cables
        • twisted pair RCA patch cable
        • speaker wire
    • Add To Cart
      $159.99
    You are here
     
     
     

    Get live, personalized service from an expert

    Crutchfield Advisor: Hi there.

    Crutchfield Advisor: We're happy to answer questions or provide additional info about this item.

    Advisors also available at 1-888-600-3963

    • Front

      Rockford Fosgate RFK4X