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EFX PA4BX Wiring Kit

4-gauge amplifier wiring kit — includes 2-channel patch cable

Item # 142PA4BX

The PA4BX wiring kit from EFX will supply your car amplifier with the wiring necessary for receiving its signal and...

Read more from Crutchfield writer, Buck P.

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$79.99

About the EFX PA4BX Wiring Kit

Get the right wire for your amp

The PA4BX wiring kit from EFX will supply your car amplifier with the wiring necessary for receiving its signal and powering up. The 4-gauge power and ground cables ensure that your amp gets all the power it needs to play music at its full potential. The ground cable features EFX's Ultimate Ground Terminal, which attaches to your vehicle's chassis by way of 3 self-tapping screws (included) to make sure you get a tight physical and electrically secure ground connection.

Get the right wire for your amp

The PA4BX wiring kit from EFX will supply your car amplifier with the wiring necessary for receiving its signal and powering up. The 4-gauge power and ground cables ensure that your amp gets all the power it needs to play music at its full potential. The ground cable features EFX's Ultimate Ground Terminal, which attaches to your vehicle's chassis by way of 3 self-tapping screws (included) to make sure you get a tight physical and electrically secure ground connection.

This wiring kit works with amplifiers with between about 450 to 1100 watts RMS of total output power. Please check your amplifier's installation instructions to confirm the proper size wire to use. The kit includes a stereo RCA patch cable, remote turn-on lead, in-line fuseholder, fuse, and an assortment of connectors and hardware to help with your amp's installation.

This wiring kit does not include speaker wires. You will need to purchase those separately, in order to complete your amplifier installation. This kit includes patch cables for a 2-channel or mono amp — you'll need to add cables for multi-channel amps.

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Product highlights:

  • amplifier wiring kit with power, ground, and audio connections
  • 17-foot blue 4-gauge power cable
  • 2-foot black 4-gauge ground cable with Ultimate Ground Terminal
  • 17-foot blue remote turn-on lead
  • 17-foot twisted pair RCA patch cable
  • 100-amp fuse and in-line fuse holder
  • 6 feet of flex loom
  • assorted mounting screws, crimp-on connectors, and wire ties
  • warranty: 90 days (no warranty on fuses)
  • Our 60-day money-back guarantee
  • MFR # EFXPA4BX
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What's in the box:

  • 17' Length of 4 AWG blue power wire with in-line Mini-ANL fuse holder and ring terminal
  • 2' Length of 4 AWG black ground wire with Ultimate Ground Terminal
  • 17' Length of blue 18 AWG turn-on wire
  • 17' Length of Core-Twisted RCA interconnect cable (2 male RCAs on each end)
  • One 100A Mini-ANL fuse
  • 6' Length of black 3/8" split loom tubing
  • Firewall grommet
  • 2 Spade terminals for 4 AWG wire (1 red/1 black)
  • 1 Spade terminal for turn-on lead
  • 1 Butt connector for turn-on lead
  • 2 Self-tapping screws for fuse holder
  • 3 Self-tapping screws (for Ultimate Ground Terminal)
  • 6 Plastic cable ties (length=8")
  • Instructions

Customer reviews

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EFX PA4BX Wiring Kit Reviews

Average Customer Review(s):

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Pros:

Cons:

Crutchfield response

More details on the EFX PA4BX Wiring Kit

Product Research

Features

Compatibility: The PA4BX kit is designed for amplifiers with fuse ratings up to 100 amps.

Kit Contents: This amp wiring kit includes the following:

  • Power/Ground/Remote wire: The power/ground wires use OFC (oxygen-free copper) for high-current delivery. The wires use fine strands of copper and soft-touch insulation for maximum flexibility.
    • 17' length 4 AWG blue power wire with in-line Mini-ANL fuse holder (no fuse installed) and a ring terminal (0.314" inside diameter, 0.66" outside diameter)
    • 2' length 4 AWG black ground wire with patent-pending Ultimate Ground Terminal for reliable ground connections.
    • 17' length of 18 AWG blue turn-on lead
  • Fuse: One 100A Mini-ANL fuse
  • RCA Patch Cable: 17' Core-twisted stereo RCA interconnect cable with split-top center pin and segmented shield for maximum contact and connection reliability. Twisted pair construction gives you maximum noise rejection and better sound quality. The RCA plugs have a micro barrel design and integrated strain relief.
  • Connectors: The kit includes the following crimp-on terminals:
    • Two 8-gauge crimp-on spade connectors (with 1 red and 1 black rubber insulator boot)
    • One 18-gauge crimp-on spade connector with red plastic boot (for remote turn-on lead)
    • One 18-gauge crimp-on butt connector (for remote turn-on lead)
  • Mounting Accessories:
    • 6' length of 3/8" diameter split loom to protect cables
    • 2 Phillips-head self-tapping screws (for securing the fuse holder)
    • 3 Phillips-head self-tapping screws (for securing the Ultimate Ground Terminal)
    • Plastic firewall grommet (0.406" inside diameter, 0.5" outside diameter)
    • Six 8" plastic wire ties
    • Instructions

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
uhhhh because I need it? [ aaron  Mar 04, 2019 ]
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Has everything I need and looks decent. [ Aaron  Mar 02, 2019 ]
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Has what I need [ Patrick  Mar 01, 2019 ]
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Needed a wiring kit for a install on my cousins truck. My advisor let me know exactly which gauge his amp would need. [ ZZealleauss  Feb 08, 2019 ]
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Installer advice [ R  Jan 27, 2019 ]
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It's a great wiring kit for the money [ Brian  Jan 21, 2019 ]
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found other wiring kits for cheaper all claiming to be 4 gauge or even 0 gauge but alot of mixed reviews and i trust crutchfield more than some random place and know they will take care of me so i chose this product over a cheaper one [ Matthew  Jan 15, 2019 ]
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Has the RCA patch cables included versus the Crutchfield kit. [ Matt  Jan 11, 2019 ]
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I ordered a kicker subwoofer amp for my Lexus and ignored the message to add a wiring kit. [ Kendall  Jan 07, 2019 ]
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Needed it to wire my Truck correctly. [ Michael  Jan 06, 2019 ]
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Recommend by staff from crutchfield . Trusting it [ Robb  Jan 03, 2019 ]
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My adviser said it works and I trust the people at Crutchfield. [ Caleb  Dec 18, 2018 ]
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My brother recommended [ Tiffany  Oct 26, 2018 ]
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I needed a wording kit and this one had everything I needed. [ Matthew  Aug 09, 2018 ]
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It was recomended to me from an advisor. [ Luke  Aug 03, 2018 ]
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Needed this for my sub that I purchased in my last order. [ Chris  Jul 20, 2018 ]
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It was what I needed to hook up my new amp and sub. [ Robert  Jul 15, 2018 ]
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idk. because buster said i needed it [ Steven  Jul 12, 2018 ]
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Missy your tech guided me [ clinton  Jul 05, 2018 ]
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Needed for my set up [ Justin  Jul 04, 2018 ]
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Required for amp wiring. [ M  Jun 21, 2018 ]
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Looks like good quality and good deal. [ Eduardo  Jun 01, 2018 ]
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Convenience [ Danny  May 19, 2018 ]
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Great product [ Jaleel dante  May 16, 2018 ]
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Memphis audio suggested a 4g kit and Cructhfield dosent carry their brand and your consultant David Wise advised me to use this one [ troy  May 01, 2018 ]
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Great quality at a great price [ WILLIAM S  Apr 01, 2018 ]
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As recommended by Gil from Crutchfield [ Bertram  Mar 25, 2018 ]
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I needed an amp kit [ Michael  Mar 19, 2018 ]
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Most complete kit for the price! I was hesitate to get a kit do to the length of the main power cable and ground, so hopefully it works out! [ Mark  Feb 28, 2018 ]
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Just recommended not sure if this is what i needed. I have access to 4 awg, wire, lugs, hardware and tie wraps, so a i don't really need it. [ Gregory  Feb 16, 2018 ]
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It had rca cables [ LEVI  Jan 23, 2018 ]
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come with patch cord [ james  Jan 03, 2018 ]
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I wanted a 4 gauge wiring kit that was also OFC. [ Kevin  Dec 28, 2017 ]
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Cheap and includes everything I need [ Luke  Dec 26, 2017 ]
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Need it [ roy  Dec 22, 2017 ]
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To wire up my Rockford fosgate 1200-1 mono [ Michael  Nov 08, 2017 ]
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For recommended installation by product [ Florencio  Oct 19, 2017 ]
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Great value, included rca patch cords. [ Carlos  Sep 18, 2017 ]
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I was looking for a OFC(pure copper) wire due to my limited voltage in my setup(no car alternator) so to minimize voltage drop I needed a good thick copper wire. but I did also like the three screw grounding terminal vs three screws around a single ring... would have liked to see a small 10-12ft wrap of 12gauge speaker wire but better that providing 16 gauge that might be a bit small. [ Daniel  Sep 04, 2017 ]
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Rating [ Sean  Aug 05, 2017 ]
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Switching my amplifier and sub out of an old vehicle [ Nicholas  Jul 22, 2017 ]
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Suggested with the amp I ordered [ Vonda  Jul 15, 2017 ]
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Im wanting to run a 2 channel sub amplifier with a 4 channel amplifier for my doors. [ Tucker Lucas  Jun 28, 2017 ]
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Recommended as the needed accessory via Live Chat help to complete my system. Hogan was very helpful in getting me in track to the products that would work for my application! [ Timothy  Jun 07, 2017 ]
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Is what I was referred to choose for wiring kit [ Carla  May 18, 2017 ]
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For my car amp [ CONRAD B  May 12, 2017 ]
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Price [ Juan  May 02, 2017 ]
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The kit included everything that I needed to connect my amplifier at a reasonable price. [ Eric  Apr 19, 2017 ]
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good quality kit at a reasonable price. [ Patrick Michael  Apr 01, 2017 ]
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I saw it in many install videos on YouTube and figured it was the best one [ Tyler  Mar 26, 2017 ]
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Second amp [ Sostenes Govea  Mar 08, 2017 ]
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needed for installation [ scott  Mar 05, 2017 ]
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Website recommended it for setup [ David  Mar 03, 2017 ]
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Recommended by Andy [ Corey  Feb 18, 2017 ]
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Recommended by advisor to hook up my Pioneer amp [ sunny1  Feb 15, 2017 ]
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recommended by advisor [ Aaron  Jan 05, 2017 ]
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Quality for the price [ ADRIAN  Dec 30, 2016 ]
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Make wiring up the Amp i bought easier [ Michael  Dec 12, 2016 ]
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I chose this product because my adviser recommended it. [ Jerson  Dec 10, 2016 ]
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It was recommended by an advisor. [ Jacob  Nov 22, 2016 ]
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needed it [ William  Sep 15, 2016 ]
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It was recommended by the advisor. [ Ron  Sep 14, 2016 ]
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Looks cool... [ JACKSON J  Sep 09, 2016 ]
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Wanted a high quality patch cable [ Alexander Pike  Sep 03, 2016 ]
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Wanted to drive a 100w rms 4 channel amp [ D  Aug 23, 2016 ]
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All inclusive materials in one package [ David  Aug 23, 2016 ]
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Price [ Tom  Aug 06, 2016 ]
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needed a amp wire kit and this was a top seller [ owen  Jul 13, 2016 ]
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To make amp install go smooth [ Comman72  Jul 08, 2016 ]
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Best stuff [ Armon  Jul 01, 2016 ]
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I chose this wiring kit because it has great reviews and high quality components. This kit made my first amp install a breeze. [ Zane  Jun 25, 2016 ]
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I chose this item because it was recommended to purchase with my Subwoofer and Amplifier Combo. [ Kierik Sage  Jun 21, 2016 ]
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to supply power and grouds to my amps and the price wasnt too bad [ HILBURN  Jun 13, 2016 ]
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My new main man Blake from the Crutchfield team was able to dig through the archives and find the tech spec's on my old used equipment, from there he answered all my questions and recommended these wires for the installation of my old used craigslist purchase. (Sorry i couldn't afford to buy everything new this time around) I'll keep recommending Crutchfield in the future! And advertising if some stickers end up in my box!?!? ;) Blake's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=12 [ George  May 15, 2016 ]
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Good value, good reviews [ Derek  May 14, 2016 ]
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Everything I needed to get my Amp wired up right. [ Robert  Apr 09, 2016 ]
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Needed it [ G  Mar 31, 2016 ]
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Read the reviews for this kit, which aided in my decision to buy. Seemed like a comprehensive kit for my 5 channel Pioneer amp I ordered today from Crutchfield. [ Michael  Mar 31, 2016 ]
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It was recommended by customer service rep. I knew it was the right equipment for the job at that point. [ eric  Mar 23, 2016 ]
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Came recommended by customer service rep Rocky to hook up an existing amp I have in a new vehicle. Rocky's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=163 [ James  Mar 18, 2016 ]
A
This was the gauge wire recommended for the alpine 1100 watt amp that i purchased. If you look at the alpine amps you will know what I'm talking about. [ donta  Mar 07, 2016 ]
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I looked at the comments and the amount of people who ordered this product and it seemed to be a very popular and quality product according to the comments. [ Teresa  Mar 01, 2016 ]
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for amp install [ Edrar  Feb 27, 2016 ]
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Good selection of items, for cheap. [ Kane  Feb 23, 2016 ]
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Length, more extras than other brands. [ Jason  Feb 23, 2016 ]
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It was reccommended by Troy. Troy's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=4 [ KEVIN  Feb 19, 2016 ]
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Otis advised me on the amp and wiring kit and told me this one would work for what I bought. Otis' Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=212 [ Michael  Feb 12, 2016 ]
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Standard kit to get 9/10 times [ Michael  Feb 12, 2016 ]
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This kit was recommended by my advisor Tim, to complete my amp and sub upgrade. Tim's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=136 [ Larry  Feb 10, 2016 ]
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Lee helped me select this amplifier kit because it had all the options needed for my amplifier installation. Thanks Crutchfield! Lee's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=79 [ Alexander  Feb 03, 2016 ]
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Need it [ Lukas  Feb 02, 2016 ]
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The reviews ranked the performance of this kit among others that cost up to twice as much. Great deal. [ Sonny K.  Dec 15, 2015 ]
SHOW MORESHOW LESS

4 questions already asked

Q
Do I need this kit if I'm purchasing a self-powered subwoofer?
[ George  Aug 14, 2016 ]
3 answers
A
That looks to be an install kit for the sub. Unless you already have all the necessary wires to connect the sub to power/ground and the rca cables to the deck then this looks to be a good kit.
[ Scott  Aug 16, 2016 ]
A
You do not need it but you will need a power supply line with fuse, an equal sized ( meaning wire thickness)negative wire, a set of RCA converter to wires since this does not have rca inputs. Kicker sells that
[ JOHN  Aug 16, 2016 ]
A
Whether it is self-powered or a separate amp, you still need to get suitable power and signal to it. If your self-powered amp comes with a power line, fuse, and signal wires then no. But I would think you would need it!
[ ROBERT  Aug 16, 2016 ]
Q
What is the outside diameter of this 4 gauge wire? Coating and all. Whole diameter.
[ Frank  Feb 26, 2016 ]
1 answer
A
We do not have the specific diameter of the cable with jacket specification you've requested. It's also not provided in the manual. If you must have this dimension ahead of time, you can try contacting Scosche directly: 800-363-4490 I hope that helps! My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5
[ Ryan  Mar 02, 2016 ]  Staff
Q
Does this kit contain ofc copper wiring?
[ LKNLover  Jun 27, 2015 ]
4 answers
A
I believe so but cannot be sure. I would call into Crutchfield and have them chase
[ TRACY  Jul 01, 2015 ]
A
Yes, I am using two of these wiring kits, one for my JL JX500/1D amp that powers my JL TW1 10" sub and one for my JX360/2 amp that powers my JL C2650. I've had them installed for over a year now and I am very happy with this product, it comes with everything you need for the install. I switched out the fuses to T-SPEC V8 Mini-ANL Fuses because the kit comes with 100A fuse and I wanted to go with something closer to what the amp was rated for.
[ THOMAS  Jul 01, 2015 ]
A
yes and I have installed two of these wiring kits in my car one for the amp that powers my sub and one for the amp that powers my speakers. I've had them installed for over a year now and had no issues. very happy with the performance of this prodict.
[ THOMAS  Jul 01, 2015 ]
A
Yes it does.
[ Edward  Jun 30, 2015 ]
Q
Is this Copper Clad Aluminum (CCA) or Oxygen Free Copper (OFC) wiring?
[ Leandro  Mar 01, 2015 ]
4 answers
A
I am not sure. I bought this product in August of last year. It is a great product and have had no issues with it. I am running an Infinity 4 channel amp on it for my 4 Infinity door speakers. I love buying from Crutchfield because they offer good customer support. I would contact tech support through chat or phone. They can easily answer thus question. I am sorry I could not be more helpful
[ Matthew  Mar 02, 2015 ]
A
The power and ground cable is copper. Not sure about the rca cables.
[ HENRY  Mar 02, 2015 ]
A
Gosh I have no clue. But it has functioned fine
[ Jcombs111  Mar 02, 2015 ]
A
I do not have an answer to what type of copper this is but I do know that this wiring kit is amazing. Extremely easy to wire and very reliable. I ran into zero issues with this product. I am sorry I could not answer your original question. I do believe it is oxygen free.
[ Brendan  Mar 02, 2015 ]

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