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EFX PA4BX Wiring Kit

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

Save with a $249+ amplifier with a $249+ amplifier
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  • EFX PA4BX Wiring Kit

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Our take on the EFX PA4BX Wiring Kit

by Buck Pomerantz
Scosche

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.

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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.

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

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

Product Research
What's in the box?

Download owner's manual

  • 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

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

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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EFX PA4BX Wiring Kit Reviews

Average Customer Review:

5 people say:

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4 out of 5

EFX PA4BX Wiring

Written By Tms, Houston on Tuesday, October 28, 2014
Crutchfield Customer Review (What's this?)
 
very nice price and good quality.
Pros:
sturdy good grade cables and connector
Cons:
could use better connetors and they should have wanred you need a bigger crimp kit to set
Was this review helpful?    Yes | No
 
4 out of 5

EFX wiring Kit

Written By Brian, Ofallon, mo on Wednesday, October 22, 2014
Crutchfield Customer Review (What's this?)
 
Great wiring kit so far. Easy to install and get through the firewall.
Pros:
Not to much to say just yet cuz I've only been able to use them for not even a week yet.
Cons:
Annoys me how short the ground wire is.
Was this review helpful?    Yes | No
 
4 out of 5

EFX PA4BX WIRING KIT

Written By DJ, SC on Tuesday, October 21, 2014
Crutchfield Customer Review (What's this?)
 
Had everything I needed to hook up my amp
Pros:
includes everything needed...instructions make hook up a snap
Cons:
for my installation, it would have been nice to have had two or three extra feet of power and ground wire length
Was this review helpful?    Yes | No
 
4 out of 5

wiring kit review 4g

Written By Bosco, Sacramento California on Monday, October 20, 2014
Crutchfield Customer Review (What's this?)
 
I upgraded the free 8g wiring kit to the 4g kit when I purchased the clutch field amp. Customer service was superb as always and they prorated the upgrade for me. As for the kit, the 4G wire is great, but one little thing, hence the one star minus is the 2ch patch rca, the 8g kit has gold plated connector and the 4G kit only comes with, assuming nickel rca connectors. Make no sense since the 4G is 30 dollars more. But I ended up using that for my sub so it's all good.
Pros:
Price
Cons:
Rca patch cable
Was this review helpful?    Yes | No
 
5 out of 5

Exactly as advertised

Written By Omar M, San Antonio, Texas on Saturday, September 06, 2014
Crutchfield Customer Review (What's this?)
 
I loved this kit. The reviews are spot on!!
Pros:
Comes with everything you need.
Cons:
None
Was this review helpful?    Yes | No
 

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For a more in-depth review and enhanced detailed information on the EFX PA4BX Wiring Kit, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_142PA4BX/EFX-PA4BX-Wiring-Kit.html ).

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