EFX PA4BX Wiring Kit
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We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
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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.
Damon, Denver, CO
Average Customer Review(s):
Awesome wiring kit!! Everything you need for an easy installation of an amp.
Excellent product. Easy to install. Instructions were on point. Tech support cannot be beat!
Pros: Easy to use.
Excellent installation kit with everything you need for an amp installation. Purchased to install an amp in a 2016 Ford Explorer.
Pros: Easy to use, everything you need.
Kit is perfect, installed in a 2008 impala all wiring was plenty long enough. Great quality wires and the 4 Guage power wire is true 4 guage.
Pros: Great wiring everything you need
Cons: Fuse block is a little aggravating to work with but is good quality
Great Quality set. Wires are killer with soft easy to form coating. Highly recommend getting this with you Amp.
Great kit! Comes with everything needed to get a sub setup. Although the ground wire is very short.
Pros: Everything needed Great quality
Cons: Very short ground cable
Well thought out package!
Pros: Well thought out parts list. Quality materials
All components worked fine and installation was.. Easy(once i figured things out) but wouldve been faster if instructions could match up for what vehicle you own and what amp you bought. It was very generic the instructions.
Cons: If youre a dip like me lol, the instructions may take you an extra 5 min.
Everything you need and more in one kit.
Pros: High quality product kit.
Made installation easy and fit great.
I'm talking about what you can feel, hear and see, the dynamic Three and Bass
Every thing you need at a great value
Pros: All you need, great value
Heavy duty gauge power and ground wires. RCA cable are quality (they don't get twisted up!) No engine noise or other outside electrical interference that destroy your signal path. I ran the power wires on the opposite side of the vehicle to the RCA input wires to ensure no interference.
Pros: Heavy duty Easy to install Don't tangle
Good quality insulated cables and wires.
Pros: Reasonably priced, good quality.
Pros: Thick OFC wire, Complete Kit, Easy to work with, Big ground wire Cons: Cheap connectors, Could definetly use 20' of power wire instead of 17' with my Crew Cab
Nice kit. Good quality. I ran the power from the battery, under the fender trim and through an existing firewall hole behind the engine. This extra routing to hide the wires left me 2.5 feet short of making it to the custom amp shelf under the parcel shelf in the trunk. Probably my fault for not measuring before, but I figured since it was a kit, it would be long enough- so I was lazy. The remote wire for the amp was plenty long, but I didn't have to run that all the way to the battery (duh).
Pros: Makes for an easy install. Everything you need, including a firewall grommet.
Cons: Power wire was too short for my needs.
Easy to install, plenty of wire.
Pros: Easy to install.
Amazing quality and got here as expected, standard shipping was fast. All cables/wires are gauged as expected and came well packaged. Nice set of accessories and work great with my 10" Kicker Comp and 1200 amp.
Pros: High quality, everything included for install, great price for what you get.
Cons: Absolutely nothing.
Great overall kit. Quality pieces. More than enough 4ga to run from the Front left at the battery along the drivers side under the carpet to under the middle rear seat. Had approx 2-3 ft left.
Pros: Well put together kit
Cons: Minor but the negative could've been another foot longer for more (better) grounding options.
one kit that had everything needed to install my amplifier. no trips to the store for forgotten connectors, extra wire, etc.
Pros: one kit that has everything needed
Great product works great!
Top quality wiring....no terminal assembly hassles...it's ready to install. Plenty of length on all wires. Ground cable is super nice.
Pros: nice quality. easy to use.
Easy installment easy to remove wiring insulation no problems at all
Pros: Allows Fast installment
Cons: Hard to ground the ground cable with its bracket
Everything worked perfectly and was exactly what I needed
I used this for my first install. Everything I needed was there, plus a few extra little components that I didn't end up needing/using. Used it to run a 2000W 5-Channel amp with a 600W sub (speakers pending), and everything works/sounds amazing.
Package has everything you need. Quality cables.
Nice quality kit, plenty of length and the wire is of nice quality! Made my install easy!
Pros: Good quality wire.
Cons: Needs to give a little more length on the ground wire I came up short considering I added a capacitor before the amp.
Perfect install kit. Everything need to do a proper installbof an amplifier
Pros: Everything included to install
Cons: You gotta find one cause I cant
I bought this product and had my hardware installed at an local car stereo shop. It had all but one item included the RCA plug-in wires.
Pros: Quality product no problems with installation.
Cons: No RCA plug-in wires.
Good: Copper, ok length of wire for positive, rca and remote. Not so Good: easy to strip the connections on the fuse block
This kit is good. All cables are good quality. It came up short on the power wire though in an 09 Impala. Other than that, good quality.
Pros: Wood quality cables
Cons: Power cord came up short
Great quality product. I found cheaper but after looking at this one when it arrived it's definitely best deal for $$$
Pros: Great quality!
Cons: Would have liked a few more 4 gauge connectors to add for a capacitor etc.
No problems using this kit. Recommended by an advisor. Price was right. Installed in a 2014 Accord 4 door. In my opinion the power lead wasn't very long. Ran it to the trunk and mounted to the back of the rear seat. only 8"-12" left. Not much wiggle room. The lead for the ground was very short as well.
Looked alright out of the box, and it came with a set of RCA cables, which I needed so I figured it was a good deal. Not so. First of all, the ground terminal on the less than generous length of ground wire does not fit on any bolts you might find in/near the trunk of a car. I should not have to drill new holes in my chassis when there are plenty of perfectly good grounds in the area. Pressed for time I shoved it as far behind one of these as I could for now. Finish up everything and go to install the fuse in the block and reconnect the battery. Once the fuse is installed there is no way to tighten the screw one side slides into. It looks like there was supposed to be a hole there that wasn't drilled. It's pitch black out at this point and don't have time. Backed the screw out just enough to wiggle the fuse under and held it down by tightening the end cap of the block. Whatever. Went to connect the +battery, discovered the hole in the end was too small to fit over the screw on my 75 series battery, which aren't exactly uncommon. Was forced to drill it out only to find the connector wasn't long enough to allow clearance between the car's +12v and the battery terminal. I ended up having to use the 8 gauge wire from my old Kicker kit that ran from the fuse block to the battery. Now I can't safely push my equipment because of the bottleneck. Nothing I've ever had from the Scosche brand has been quality or a proper fit. Not worth the savings. Ruined install of an $1,100 system.
Pros: - Came with RCA cables. - It's a pair of 4 gauge wires.
Cons: - No thought put into the designs of the connectors. - Poor quality control. - Does not fit a common 75 series battery.
Everything needed was included besides speaker wire, but that is relatively cheap and available on the site.
Pros: RCA wires
Cons: No speaker wires
Bought this to hook up my bass and amp in a boat - the advisor suggested this wire kit - problem is on a boat - you will likely need a longer ground if you mount the amp away from the engine and closer to the head unit. This kit is for a car - they need to mention this as I lost a week of my install time waiting for a 17' ground cable.
Pros: Good quality cable
Cons: Needs a longer ground for boat use.
The only issue i had was the connection to my battery didn't work more of chevys problem then to do with the kit
Pros: All of it! Great sound no transfer or issues!
Nice heavy wire
Everything worked great and seems to function flawlessly
Pros: All wire is quality and was easy to install
Cons: No fuse was in the box but they sent me two for free and the guy was very nice and helpful also the ground wire was shorter than I would have liked
Good kit, that made installing a Kenwood amplifier fairly easy.
Pros: Plenty of Blue(hot) power cable to get from battery to back of extra cab Ranger. RCA cables plenty long also, as was the Auto On connection wire, between the Radio and the Amplifier.
Cons: Ground cable too short, depending on mounting location. Extra fuse would have been handy, since I blew mine by accident. Didn't use many of the other parts. Ran my cable through hood release cable plug, so I didn't need the grommet.
Great kit and half off with the amp I ordered.
Pros: Great kit!
Cons: None so far.
Great all around wire kit for the money, again easy to run and nice fuse set up
Pros: Comes with everything needed to power a amplifier
crutchfield recommended this so i I ordered this to go with m r 1200-1d amp. i have no issues with it so far and it was easy to install myself
Pros: easy install
Exactly as described, came with connectors and everything you need to wire your amplifier.
Pros: Copper, good length of wire for positive, rca and remote.
Cons: Be careful, it's easy to strip the connections on the fuse block, very short ground cable, and the zip ties included break if you try to really tighten them down.
Very nice kit!! High quality
Overall first impressions on this kit is ok. It came in a plain white box not very impressive. Quality doesn't seem bad but I couldnt find out if it was 100% oxygen free copper which for the price it should be. The ground cable is way short. I guess i should've read more carefully but for the price that seems a little stingy imo. Other than thay no complains.
Great quality at a great price. Crutchfield comes through again!
Pros: Plenty of accessories included in this kit Power wire was the perfect length for my 07 double cab tacoma Instructions help during install
Cons: Ground wire worked for my situation but could be short in other situations. Power cable fuse housing could have a better design that is more waterproof. (Thinking about adding silicone to mine to waterproof)
Good option if you are clueless, like me.
Pros: As advertised.
Cons: The firewall grommet is worthless, if you need it. The grounding cable is short, so make sure of your placement first.
This kit has everything you need to hook up your high power amp.
Pros: The cables are very flexable and has a very high strand count.
Cons: I wish they would give you a spare fuse in the kit.
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
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.
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
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.
Cons: Rca patch cable
I loved this kit. The reviews are spot on!!
Pros: Comes with everything you need.
Compatibility: The PA4BX kit is designed for amplifiers with fuse ratings up to 100 amps.
Kit Contents: This amp wiring kit includes the following:
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 verify what’s in the box, 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.
Recommended by Andy [ Corey Feb 18, 2017 ]
Recommended by advisor to hook up my Pioneer amp [ sunny1 Feb 15, 2017 ]
recommended by advisor [ Aaron Jan 05, 2017 ]
Quality for the price [ ADRIAN Dec 30, 2016 ]
Make wiring up the Amp i bought easier [ Michael Dec 12, 2016 ]
I chose this product because my adviser recommended it. [ Jerson Dec 10, 2016 ]
It was recommended by an advisor. [ Jacob Nov 22, 2016 ]
needed it [ William Sep 15, 2016 ]
It was recommended by the advisor. [ Ron Sep 14, 2016 ]
Looks cool... [ JACKSON J Sep 09, 2016 ]
Wanted a high quality patch cable [ Alexander Pike Sep 03, 2016 ]
Wanted to drive a 100w rms 4 channel amp [ D Aug 23, 2016 ]
All inclusive materials in one package [ David Aug 23, 2016 ]
Price [ Tom Aug 06, 2016 ]
needed a amp wire kit and this was a top seller [ owen Jul 13, 2016 ]
To make amp install go smooth [ Comman72 Jul 08, 2016 ]
Best stuff [ Armon Jul 01, 2016 ]
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 ]
I chose this item because it was recommended to purchase with my Subwoofer and Amplifier Combo. [ Kierik Sage Jun 21, 2016 ]
to supply power and grouds to my amps and the price wasnt too bad [ HILBURN Jun 13, 2016 ]
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 ]
Good value, good reviews [ Derek May 14, 2016 ]
Everything I needed to get my Amp wired up right. [ Robert Apr 09, 2016 ]
Needed it [ G Mar 31, 2016 ]
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 ]
It was recommended by customer service rep. I knew it was the right equipment for the job at that point. [ eric Mar 23, 2016 ]
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 ]
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 ]
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 ]
for amp install [ Edrar Feb 27, 2016 ]
Good selection of items, for cheap. [ Kane Feb 23, 2016 ]
Length, more extras than other brands. [ Jason Feb 23, 2016 ]
It was reccommended by Troy. Troy's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=4 [ KEVIN Feb 19, 2016 ]
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 ]
Standard kit to get 9/10 times [ Michael Feb 12, 2016 ]
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 ]
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 ]
Need it [ Lukas Feb 02, 2016 ]
The reviews ranked the performance of this kit among others that cost up to twice as much. Great deal. [ Sonny K. Dec 15, 2015 ]
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 ]
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 ]
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 ]
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
I believe so but cannot be sure. I would call into Crutchfield and have them chase [ TRACY Jul 01, 2015 ]
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 ]
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 ]
Yes it does. [ Edward Jun 30, 2015 ]
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 ]
The power and ground cable is copper. Not sure about the rca cables. [ HENRY Mar 02, 2015 ]
Gosh I have no clue. But it has functioned fine [ Jcombs111 Mar 02, 2015 ]
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 ]