About the Rockford Fosgate RFK4D Amp Wiring Kit
Product highlights:
- dual amplifier wiring kit
- cables meet or exceed the American Wire Gauge specifications and requirements
- 17 feet of 4-gauge power cable
- 6 feet of 8-gauge power cable
- 3 feet of 4-gauge ground cable
- 6 feet of 8-gauge ground cable
- 20 feet of 18-gauge turn-on lead wire
- two 16-foot twisted pair RCA patch cables
- 30 feet of 16-gauge speaker wire
- MAXI fuse holder and 100-amp fuse
- two 4-gauge to 8-gauge distribution blocks
- assortment of wire termination hardware and cable ties
- warranty: 1 year
- MFR # RFK4D
- Item # 575RFK4D
What's in the box:
Rockford Fosgate RFK4D Amp Wiring Kit owner's manual
If you need assistance accessing this owner's manual, please give us a call.- 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)
- 3' Ground cable (4-gauge) in a gray translucent jacket (with a ring terminal on one end)
- 6' Power cable (8-gauge) in a red translucent jacket
- 6' Ground cable (8-gauge) in a gray translucent jacket
- 2 Distribution blocks (One 4-gauge in/Three 8-gauge out)
- Two 16' twisted pair RCA patch cords
- 30' Length of 16-AWG speaker wire
- 20' Length of turn-on lead in a blue jacket
- Ten 4" wire ties
- Plastic bag containing the following:
- Crimp-on ring terminal for 4-gauge wire
- Large black rubber boot
- 100A MAXI fuse
- Plastic 4 gauge-sized grommet
- 2 Red plastic butt connectors
- 5 Crimp-on female 0.25" quick slide connectors
- 5 Crimp-on spade connectors
- 3 Red rubber boots
- 2 Black rubber boots
- Decal with model and serial numbers
More details on the Rockford Fosgate RFK4D Amp Wiring Kit
Researched by Crutchfield's Mark G.
The Rockford Fosgate RFK4D Amp Wiring Kit replaces these items:
Product Research
Features
General Overview: This is a dual amplifier wiring kit that includes 4-gauge and 8-gauge power and ground cables, power distribution blocks, turn-on leads, two pairs of stereo RCA cables, a 30' length of 16-AWG speaker wire and other accessories required to install two amplifiers.
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. For example, the included 4-gauge power and ground wires each have 1,862 copper strands, compared to the 735 copper strands which meets the standard.
In-line Fuse Holder: The included in-line fuse holder attached to the power cable comes with a 100-amp MAXI-type fuse.
Power Distribution: The kit includes two unfused power distribution blocks. Each block has a single input and three outputs. There are insert sleeves that allow you to use multiple sizes of wire: a 1/0 gauge-to-4 gauge sleeve for the input, and three 4 gauge-to-8 gauge sleeves for the output.
Patch Cables: There are two 16' RCA patch cables included, each with twisted pair design for noise rejection, and a split center pin that helps secure the connections at both ends.
Speaker Wire: The amplifier kit comes supplied with high strand 16-AWG speaker wire for increased sound transfer.
Accessories: The kit includes the following accessories needed for amplifier installation:
- Ring terminal for 4-gauge wire and rubber boot
- Spade terminals for 16-gauge speaker wires with red and black rubber boots
- Female quick slides for 16-gauge speaker wires
- Butt connectors for splicing together wires
- Grommet for routing 4-gauge power wire through the firewall
- Wire ties for securing wires to the vehicle
The Rockford Fosgate RFK4D Amp Wiring Kit replaces these items:
- 4-gauge blue power cable w/ring terminal
- 8-gauge blue power and 8-gauge silver ground cables
- fuse holder w/100-amp fuse
- 4-gauge red power cable w/ring terminal
- 8-gauge red power and silver ground cables
- fuse holder w/100-amp fuse
- Dual Amp kit with 4-gauge power and ground cables
- 8-gauge power and ground cables
- platinum-plated fuse holder w/60-amp fuse
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Customer Q&A
7 questions already asked
Q
Does this kit provide a capacitor and all the fuses I need? I read multiple places that I need a fuse on both sides of the distribution block? Also, do I need to buy a harness separately? Is there ANYTHING I need to buy besides the kit to connect the signal and power to the amps and the to the speakers? Sorry, I've never done this before.
ben May 20, 2020
2 answers
A
It does not come with a capacitor. The kit is for the installation of two amps. I used it to power one amp for 2 twelve inch subs and the other for 6 speakers. It's not to hard to install.
raymond May 20, 2020
A
This kit does not provide a capacitor. If your setup will require one, purchase it separately. This kit comes with 1 large fuse that fits in an inline holder at the battery or capacitor end. It does not have other fuses for in between your components. Your amps should have adequate protection on board, but you could always put another fuse/distribution block or inline holder for each amp. I did not when I installed this kit. Other than that, this kit is full of everything else you need.
michael May 20, 2020
Q
Does this kit provide a capacitor and all the fuses I need? I read multiple places that I need a fuse on both sides of the distribution block? Also, do I need to buy a harness separately? Is there ANYTHING I need to buy besides the kit to connect the signal and power to the amps and the to the speakers? Sorry, I've never done this before.
ben May 20, 2020
4 answers
A
No capacitor is included.
Kit is complete for a two amp set up.
I would need to know how much power you need to answer whether you need a capacitor and if you need a fuse between block and amp. How much RMS are your sub(s)?
jose de la May 20, 2020
A
No a Capacitor is sold separately. You get the main fuse from the battery. I've never used a fuse on both sides of the distribution block usually the main from the battery and the amp should have its own fuse. No separate harness should be needed for the capacitor maybe extra fittings if they don't come with the capacitor.
mamdouh May 20, 2020
A
There is one fuse and no capacitor in this kit
craig May 20, 2020
A
The kit is complete with a 100 amp fuse that goes right after the battery connection. I did not put any additional fuses after the distribution block. Works fine
joe May 20, 2020
Q
This kit doesn't look sufficient for multiple amps, as there seems to be only 1 set of power and ground cables for the battery and 1 amp from the distribution block, or am I missing something?
bradlee Mar 07, 2020
6 answers
A
This is designed for the small Rockford Fosgate amps. The Power T400x4ad and it's marine sister, the T750x1bd, T500x2br, T1000x5ad and the T400x2ad as they won't accept more than an 8ga. power wire input. If you notice, the 4ga run is 16ft. where the 8ga are both 3ft along with all the negative runs. The ONLY thing you'd really need to add to this if you were to use it would be 12ga speaker wire and another set of RCA cables if using a 4 channel amp. However, if you're running to mono amps, you'll be fine with this.
justus Sep 18, 2021
A
4 ga from battery to the distribution block then 8-ga from distribution block split to two amps. Hope that helps!
kent Apr 02, 2020
A
The provided 8 ga wire is intended to be cut to split it between the 2 amps.
nate Apr 02, 2020
A
This kit is capable of running 2 amplifiers. I used this kit for 2 amps on my harley
joshua Apr 02, 2020
A
It is, that's what I ordered. D block had three outputs, you'll have one empty
jose de la Apr 02, 2020
A
There are 2 distribution blocks that will supply power to 2 amps.
joe Apr 02, 2020
Q
I'm looking to add 2 amps but firstly only one for the sub,
one 500w mono at 2 ohm for my 2 ohm sub and a second 100w/ 4 4 ohm for the speakers. would this be all I need in terms of power and needed wires ? Keeping in mind that the 2nd amp recommends 4 gauge alone itself.
firespider Nov 23, 2019
1 answer
A
We would have to look at your amp's fuses to make sure, but I am fairly confident this kit would work to give power to them. It doesn't come with speaker wire big enough for a sub and I recommend looking at 12 gauge wire for that. You may also need a second RCA audio cable. We have advisors that you can contact by calling 1-800-324-9695 to discuss your amps, radio, etc... to get a personal recommendation on all the wiring you will need.
jason Dec 16, 2019 (Staff)
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Great product along with fair pricing. Highly recommend this purchase for stereo upgrades. Covered majority of my needs with one purchase. Only improvement for my install, was to double the amount of speaker wire included. Thanks!
Parker from Alexander, AR