This wiring kit does not include speaker wire, so you'll need to purchase that separately to complete your amp installation. This kit includes patch cables for a 2-channel or mono amp — you'll need to add cables for multi-channel amps.

Make sure you enjoy the full potential of your new amplifier by hooking it up with quality power and signal connections.

This wiring kit from EFX includes 4-gauge power and ground cables, 17' Stereo RCA interconnect cable, space-saving mini wafer fuse holder and fuse, and all the accessories you'll need to connect your new amp. Just add whatever speaker wire you need, and you're ready to go. Designed for amplifiers with a fuse rating of up to 100 amperes.

Product Highlights:

  • amplifier wiring kit with power, ground, and audio connections
  • 17-foot blue 4-gauge power cable
  • 4-foot silver 4-gauge ground cable
  • 17-foot blue remote turn-on lead
  • 17' Stereo RCA interconnect cable
  • 100-amp mini wafer in-line fuse and fuse holder
  • 6 feet of flex loom
  • assorted crimp-on connectors and wire ties
  • warranty: 1 year (no warranty on fuses)
  • Our 60-day money-back guarantee

EFX 4-gauge Amplifier Wiring Kit Reviews

Average Customer Review:

75 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $350 rewards card


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

EFX 4-gauge Amplifier Wiring Kit

Written By warren, patton pa on Sunday, June 08, 2014

Crutchfield Customer Review (What's this?)

just what you need

Pros: nicely made

Great kit

Written By Anonymous, New York on Saturday, June 07, 2014

Crutchfield Customer Review (What's this?)

This was a great quality kit.

Pros: Good price and great quality

EFX 4-gauge Amplifier Wiring Kit

Written By ErikW, Sicangu Nation, South Dakota on Friday, May 30, 2014

Crutchfield Customer Review (What's this?)

Second best wiring kit ive purchased the first was a Memphis Audio 4Gauge this compared admirably sustains the power efficiently and everything was easy to use.

EFX 4-gauge Amplifier Wiring Kit

Written By Anonymous, champaign, il on Wednesday, May 21, 2014

Crutchfield Customer Review (What's this?)

this kit had everything i needed and was very impressed!


Written By kenp, Bradenton florida on Saturday, April 19, 2014

Crutchfield Customer Review (What's this?)

Would recommend this to anybody

Pros: Well built. Long wires for all situations. good insulation

Cons: The heat shelf tube stuff isn't the best quality

Wiring kit

Written By Brock, San Antonio on Friday, April 04, 2014

Crutchfield Customer Review (What's this?)

Came with everything I needed. Works and sounds great. Defiantly worth the price.

Pros: Overall a good buy

Amp install kit.

Written By Majic, Canfield, Oh on Monday, March 31, 2014

Crutchfield Customer Review (What's this?)

This kit was complete. All I had to add was a 4-way patch cord and I had everything I needed to complete my install.

Pros: All the necessary components were contained and very high quality. Very good value for the money.


Written By RandyD, Kaneohe on Sunday, December 15, 2013

Crutchfield Customer Review (What's this?)

The product it's self was nice and works and looks good. I'm not sure why this was recommended all I used was the power and ground cables. the rest was not needed. I'm guessing the kit was cheaper than the power and ground cables bought separately. Over all I'm pleased with what I got


Written By NMS499, Canterbury Ct on Tuesday, December 10, 2013

Crutchfield Customer Review (What's this?)

Product does what it says, quality stuff.


Written By Brad, Wisconsin on Monday, November 18, 2013

Crutchfield Customer Review (What's this?)

Great product

a ok starter kit

Written By Anonymous, michigan on Sunday, September 15, 2013

Crutchfield Customer Review (What's this?)

Power, grounds, and remote wire of good quality but the RCA Cable Is of lower quality.I could have bought these RCA's at Walmart. Consider putting your own combo together to avoid the rca. But if price is of importance, remember, you get what you pay for.

Pros: economical choice for beginner systems

Cons: rcas lack clarity, loose ends more than likely to blame

Kit's fine - needed another set of patch cables

Written By MarkS, Sellersville, PA on Saturday, September 14, 2013

Crutchfield Customer Review (What's this?)

The kit was fine - good instructions and complete...for a 2 channel amp! Much dismay when I opened the kit after ordering it and an Alpine 4-channel amp (Alpine MRX-F65) from Crutchfield with the intention of installing over the 3-day Labor day weekend. Perhaps I should have known this - perhaps I should have been advised by my Crutchfield sales advisor who recommended the kit - I called on Friday and was advised that I did need another set of RCA patch cables as the kit only came with a pair for a 2-channel amp...really? Did not want to take the chance of ordering and not arriving on Saturday due to Holiday weekend so I had to buy at a local store. So for the hassle factor of having to still go out to a retail store and buy wiring - I give this a "4". That said, my local store did carry a complete set of various gauge amp wiring kits by kicker and the patch cables I bought from them were as good in quality as the ones in this kit - but much more flexible and easier to work with. (Price? +/-). Lesson learned. Amp installed and system sounds unbelievable!!! I'd still go back to Crutchfield as their advice remains the best in the business.

Pros: Quality and completeness of kit

Cons: Still need another set of RCA patch cables if installing a 4-channel amp - be aware!

Great amp kit!

Written By Jay, 17331 on Friday, July 26, 2013

Crutchfield Customer Review (What's this?)

Great amp wiring kit. It could use a couple more feet of remote wire but other than that it has everything you need.

very well put together package

Written By Mike V, ShelbyTwp on Sunday, July 14, 2013

Crutchfield Customer Review (What's this?)

really a great package has no issues

Pros: very nice wiring and accessories

Cons: firewall grommet too small and brittle

Came free with amp

Written By Brandon, Owings Mills, MD on Saturday, June 01, 2013

Crutchfield Customer Review (What's this?)

Comes with everything you need to install a single amplifier. Perfect unless you plan on powering thousands of RMS watts. I'm using it on a 750 RMS X 1 @ 4 ohm JBL amp and have seen no downside.

Pros: Was free with amp, is a complete wiring kit, works perfectly for my application

Cons: None

wiring kit for kiker sub and amp

Written By all enclusive wireing kit, San Antonio.Tx on Monday, May 13, 2013

Crutchfield Customer Review (What's this?)

Kit was complete and ready and easy to install. Wiring was sufficient

Pros: Very good quality

Cons: None

nice 4 gA wire and extra fuse

Written By Anonymous, quantico va. on Wednesday, March 13, 2013

Crutchfield Customer Review (What's this?)

good sub kit

No Issues...Extra Fuse is Nice

Written By Matthew, Santee, CA on Thursday, December 20, 2012

Crutchfield Customer Review (What's this?)

What can you say, the kit is built of quality products. The RCA connections are super tight to the back of my head unit which is great so they won't come loose. Cable is covered nice with a think layer of plastic, Not the most flexible but I understood that before I bought it, but thats what more expensive kits are for but you pay extra for flexibility. Nothing a hot hair dryer can't fix. Great kit and the extra 100A fuse was a nice touch.

Pros: Extra Fuse, Quality 4 AWG cable

Cons: None that I could tell...all connections were great

Nice Kit

Written By Tw, Las Vegas, NV on Tuesday, November 27, 2012

Crutchfield Customer Review (What's this?)

Had everything I needed. Pretty self explanatory.

EFX 4-gauge Amplifier Wiring Kit

Written By Anonymous, SanAntonio, TX on Friday, November 23, 2012

Crutchfield Customer Review (What's this?)

this product is awesome! don't have to splice in the fuse holder and the cables are easy to work with.

Pros: simple to work with. excellent quality

Cons: Nice

Perfect kit

Written By Daren, Spokane WA on Wednesday, September 05, 2012

Crutchfield Customer Review (What's this?)

I only chose this kit because it was free with my amp. Turns out this kit was perfect and contained everything I needed. The only thing it doesnt come with is speaker wire for between the amp and the speaker. I wouldnt expect the kit to include this anyway, because some installs need 3 feet, and others need 50 feet.

Pros: Qualyty cables with nice appearance.

Cons: Some people say the wires are a little short, but they were just right for reaching my Toyota Tundra Extended Cap pickup backseat floor, I would say they are long enough for 90% of installations.

great kit! best of all it was free

Written By Chester D, Lynn MA on Thursday, August 16, 2012

Crutchfield Customer Review (What's this?)

great kit. it does what it's designed to do.

Pros: all the hardware and terminals are included.

Cons: the +12v and -12v require are vice or a hammer to secure the terminal to the cable. -FYI.

EFX 4-gauge Amplifier Wiring Kit

Written By HP178, League City, TX on Sunday, July 22, 2012

Crutchfield Customer Review (What's this?)

Just as described. Great product.

Cons: Would have been nice for the power cable to be 1' longer.


Written By Matt314, St. Louis, MO on Wednesday, July 18, 2012

The amp kit does not include the required fuses.

Crutchfield response on Wednesday, July 25, 2012 "Thanks for your review. This kit does include fuses. In this instance it appears they were not in the package, and we have issued a refund to cover the cost of fuses."

Good quality, plenty long enough.

Written By Doyle V, Teague, Tx on Sunday, March 18, 2012

Crutchfield Customer Review (What's this?)

I used this kit to install an amp in my 2009 Dodge Mega Cab. All the wires were long enough to go from the radio all the way to behind the rear seat in the middle of the cab. I ran power down one side and cables down the other under kick panels. Zero noise. The kit came with two 100 amp fuses but Crutchfield can get you different amp fuses if you need them.

Pros: Good quality kit

Cons: None

Very Nice

Written By t s, Dallas on Tuesday, December 27, 2011

Came free with my JL Audio XD400.4. Never used an kit like this before, but it was pretty nice. Because the battery in my Camaro is in the trunk, I had enough wire left over to re-wire my sub amp.

Pros: price

Good Kit, Could be Better

Written By Joe, USA on Tuesday, October 25, 2011

Crutchfield Customer Review (What's this?)

If your focus is on hooking up amp power and signal input and making it look and perform like a professional installation than this is a very good quality kit that gets the job done well. I did a lot of shopping on other sites and this kit was definitely the right choice. I had confidence I was getting a great product up front because it's from Crutchfield and you know they stand behind it. The downside is the power cable is barely long enough for a midsize car. This kit went into a 2002 Camry and I routed the power as efficiently as possible and it just barely made it to my amp in the trunk pushed up against the rear seat backs There was zero margin. Another foot or two of power cable is really needed if you run into any issues at all when routing in engine compartment or thru firewall. Had to reposition several times to make it work. One other thing to look out for is that the power cable wasn't well seated in the fuse holder. It popped out during installation. Be sure to check the tightness of the allen head screws. Could be a world of hurt if the cable slips out after you are hot.

Pros: Good quality wire and components, includes eveything you need for power and input signal.

Cons: Power cable just barely long enough. Allen screws not tightened well on fuse holder.

EFX 4-gauge Amplifier Wiring Kit

Written By ReggieP, Louisville Ky on Sunday, September 25, 2011

Crutchfield Customer Review (What's this?)

You cant go wrong when Crutchfield has done all the home work for you,the right gear makes the job so simple and gives you the best sound for your buck,this amp kit had more than enough wire to locate the amp were i wanted it at and the cool blue color of the wire matches the car's blue color

Good Kit.

Written By A O, AL on Tuesday, September 06, 2011

Crutchfield Customer Review (What's this?)

This kit did just the job for me. Great in a super cab truck. The wires are proably too short for a passenger car. I gave it three stars because Crutchfield's website and the support team both say it includes a 100 amp fuse. It does not!!! And in a small town they are hard to come by. This delayed me 4 days over a long weekend.:(

[Editor's Note: The 100 amp fuse should have been included with your kit. Our Customer Service Department will be in contact with you.]

Installed in a 2006 GTI

Written By Max, Gardena, CA on Tuesday, August 30, 2011

Crutchfield Customer Review (What's this?)

Great product. Long enough to reach your desired location. Sounds awesome with my JL Audio 600 amp and JL Audio stealthbox. Only problem I had was the plastic case surrounding the power cable that enclosed the fuse was cracked and was not able to use it. But the cables themselves work great.

Legiti kit

Written By Matt B, Alexandria, VA on Tuesday, August 16, 2011

Crutchfield Customer Review (What's this?)

Legit kit.

EFX 4-gauge Amplifier Wiring Kit

Written By Stephen, huntsville, AL on Wednesday, June 22, 2011

Crutchfield Customer Review (What's this?)

great quality, only issue was that power cable is a little short if you need to reach the rear of large vehicle. Limited my options.

Great Buy

Written By Anonymous, Whittier,Ca on Friday, June 03, 2011

Crutchfield Customer Review (What's this?)

easy installation...great performance...comes with everything you need to install the kit...can be installed in under thirty minutes, depending on your car...Great Buy

could be better

Written By Dennis, Northern NJ on Friday, May 20, 2011

Crutchfield Customer Review (What's this?)

As described, but could have included better termination lugs for the 4 AWG wire.

EFX 4-gauge Amplifier Wiring Kit

Written By Anonymous, Rock springs, WY on Monday, May 16, 2011

Crutchfield Customer Review (What's this?)

A definite must-have for any amp install, takes the guesswork out, everything
you need, incuding heat shield wrap and sleek fuseholder for a professional
looking install

Great Value, Easy Install

Written By tPal, Milwaukee, WI on Sunday, May 08, 2011

Crutchfield Customer Review (What's this?)

This kit was recommended for my setup and it had everything I needed, plus it was
all quality materials. Include the decent price and this is overall a great deal!

EFX 4 gauge Amp wiring kit

Written By David, Brooklyn on Friday, April 15, 2011

Crutchfield Customer Review (What's this?)

Everything was there to make for a easy and quick install seems like a great
product. Great product for the money.

EFX 4-gauge Amplifier Wiring Kit

Written By Anonymous, peabody ma. on Friday, March 11, 2011

Crutchfield Customer Review (What's this?)

great wire set came with everything that i needed at a great price

Solid Kit

Written By KeithW, New York on Friday, March 11, 2011

Crutchfield Customer Review (What's this?)

Great Kit. Has everything you need for a single amp hookup. I used this in my 4
door Jeep Wrangler from the battery to the back and had plenty left over. Feel
and looks like good solid quality of wire.

Great Kit!

Written By BrendanG, Middleboro, MA on Friday, February 18, 2011

I used this kit to wire up my 1998 Ford Ranger and it was easy as heck! The fuse
block never came undone for me like other say, but all I did was screw it into a
piece of plastic near my battery, installed the fuse and did not touch it.

I took the remote wire, and connected it to my other amp, not best practice but
saves me to rip up my carpet after I forgot that.

The wire is as flexible as you can get at this size, some people don't realize
how much power they are moving, but it did tuck right into my carpet no problem.

I blew one of the fuses while installing my capacitor(didn't use charge circuit)
so my fault there, but after that I have yet to blow a fuse. I have an infinity
reference 600W mono amp, and JVC 2 channel amp for my rear speakers, and no
issues powering both of these. My lights don't dim, cables always cool to the touch.

The RCA cables are fine, plenty of plastic on them don't let that fool you, more
plastic is not more shielding. Keep these as far away as you can from your power
cable. However no where in my system is static an issue so I can't dock any
points for that.

So, Easy Install, very straightforward process. If this seriously confuses you,
please call an adviser or a friend who knows what they are doing. You are
playing with your car's electrical system and a lot of power. Also DISCONNECT
your negative terminal! Everyone says do it, for a good reason. That will kill
power on the line, less chance to shock yourself.

Pricey but great

Written By theDoctor, PA on Wednesday, January 19, 2011

Crutchfield Customer Review (What's this?)

This wire kit is the best one I have seen. I used it in my Honda Civic to wire a Rockford Fosgate amp and 12-inch Pioneer subs at 580W rms. It is a little pricey but really really nice.

EFX 4-gauge Amplifier Wiring Kit

Written By Derek, Atlanta, GA on Sunday, June 27, 2010

Crutchfield Customer Review (What's this?)

The fuse holder was a little bit difficult to work with. The cover doesn't like to stay on, and I couldn't get the grommets to seat completely to my satisfaction. However, the inclusion of two fuses more than made up for these mild annoyances.

EFX 4-gauge Amplifier Wiring Kit

Written By Anonymous, Mansfield, MA on Monday, June 07, 2010

Crutchfield Customer Review (What's this?)

Kit arrived quickly so thats a star for Crutchfield. Kit was complete no
missing parts but would have liked to have seen more terminal connectors in the
kit than what it had like banana terminals etc. 4Guage wires are what my
800watt amp called for in the manual although I would have been able to go
8Gauge since power source is actually in my trunk not under the hood so the amp
is less than 3 feet from it.

Like a previous customer posted one end of the fuse block came out during
installation, just needed to be re-inserted and tightened and the fuse hold
cover comes off way too easily (I know not an issue once its mounted.) I had to
cut down the ends of the cables diameter to get it to fit in the term block of
the amp cause It was too big, which is funny since thats what the amp called
for. (not Scorches fault.) but it was workable. Good quality cables. Just
removing one star due to the feel of the fuse block.

EFX 4-gauge Amplifier Wiring Kit

Written By douglas, Central Fl on Wednesday, May 19, 2010

Crutchfield Customer Review (What's this?)

Its a good kit overall.

The wires weren't that flexible, but there manageable.

The remote wire was very thin and ended up breaking, and the rcas werent the best quality but they work..

and i replaced the use with a 200 amp breaker so i dont have to constantly buy new fuses each time one blows.

Not bad

Written By Anonymous, NYC on Monday, February 15, 2010

Crutchfield Customer Review (What's this?)

I installed the kit pretty quick. I had a lot of power ,ground, and rca wire left over, maybe because my car is a coupe. But overall a good cheap buy. Only problem is that the fuse holder looks kinda cheap and one end doesn't hold the power wire tight so it comes out( bought some electrical tape and took care of it), another problem was that my kit didn't come with any fuses but I called and they are sending me 2 fuses overnight, great customer service!.. The wire ties suck but you really don't need em so just throw em out. (break easily) but other than what i mention its a good kit, i would recommend this..

EFX 4-gauge Amplifier Wiring Kit

Written By samch0i, Wantagh, NY on Thursday, January 28, 2010

Crutchfield Customer Review (What's this?)

Awesome kit, used it on my Honda S2000 and I love it. The only con I can say about the kit is the 6 plastic wire ties break easily. But, thats no big deal in my opinion, and other than that this amp kit is definitely worth the price and I highly recommend.

EFX 4-gauge Amplifier Wiring Kit

Written By PAT, GUAM on Saturday, April 11, 2009

Crutchfield Customer Review (What's this?)

Everything your looking for comes in this kit......Its worth your budget plus comes in the color to match my set up......Thanks Crutchfield........

Great Product

Written By Joshua, St. Louis, MO on Saturday, March 28, 2009

Crutchfield Customer Review (What's this?)

Wires Look Great And Give My Amps Enough Power To Run Properly, Plenty Of Length To Wire My 06 Grand Cherokee

Worked Great

Written By Lrayh82, Cuero, TX on Thursday, February 26, 2009

Crutchfield Customer Review (What's this?)

Great Wiring kit for small car like mine. If you have a larger car you may be safer with a little longer power cable.

Typical Amp Wiring Kit

Written By Donny, Muscle Shoals, AL on Wednesday, January 21, 2009

Crutchfield Customer Review (What's this?)

The EFX 4-gauge Amp Wiring Kit is a typically designed piece of equipment. It has everything one would need to do the job at hand. You definitely get your moneys worth compared to some of the other bigger named brands. For me, I did like the color a little better than some of the other kits offered.

Decent kit

Written By Rob, Detroit, MI on Monday, January 19, 2009

Crutchfield Customer Review (What's this?)

I bought this kit for an alpine mrp-m500 amp powering 2 alpine 12s.
I have had just one issue with kit, the clear plastic fuse cover on the fuse holder came loose and fell off while driving.
I called crutchfield and they sent me a new fuse holder.
A+ customer service

Just ok for money

Written By Chris, Fort Worth, TX on Sunday, December 21, 2008

Crutchfield Customer Review (What's this?)

My advice is to skip this kit and spend the extra bucks on a better one. Wire is good in this kit. But terminals and fuseblock is cheap. The wire came pre-crimped for the battery connection and was too short for my truck. I would have rather them not crimp it and let me decide the length. you don't want to have a huge lead in front of the fuse, but I just needed 4 more inches. Cable ties are worthless. Butt connectors wouldn't crimp right and came loose.

good kit for the money

Written By Jonathan, Wailuku, HI on Sunday, November 02, 2008

Crutchfield Customer Review (What's this?)

This is a good wiring kit which has all of the essentials, including a very nice fuse holder and a spare fuse. Got the kit 50% off when I bought my sub amp, making this kit a killer deal. Definitely buy this kit while Crutchfield still has this promotion running.

Not for Me

Written By Craig, Phoenix, AZ on Tuesday, October 21, 2008

Crutchfield Customer Review (What's this?)

This wasn't on my buying list but Crutchfield recommended it. After looking at the content I just didn't need it. I got a return auth from Crutchfield and they were fantastic about taking it back, even paying for the shipping!

almost perfect

Written By allen, middle of no where W.V. on Friday, October 10, 2008

Crutchfield Customer Review (What's this?)

Great kit for the price. I run a install shop and have not found a better value on the market. The zip ties in the kit are worthless. I was able to crimp the connectors with an average set of pliers but you better have strong hands they are heavy made. Thats exactly what you should want though. Make sure you buy speaker wire and zip ties. You also want to possibly order another fuse when you purchase your kit I have not seen the type of fuse in this kit available at any local parts store. The wires are blue and spruce up any engine compartment. It comes with ample amount of wiring, conectors, remote wire pretty much everything you need but what I listed above. Dont buy lower grade wires than this even for small watt aplilcations. You will either blow fuses or overheat your amp everytime you turn the volume up for extended periods. Even if you can find a kit cheaper with the same quality I would still recommend spending the few extra bucks and buy from crutchfeild their customer support is top notch If they cant answer your questions your probally shouldnt even try it.

Sweet Wires

Written By cody, Texas on Thursday, September 11, 2008

Crutchfield Customer Review (What's this?)

these wires worked perfect for my system
they came with great instructions
it also has plenty of wire for whatever vehicle you have
i drive an SUV and the wire stretched from the front to the back with extra slack

EFX 4-gauge Amplifier Wiring Kit

Written By Quinc, Chico, CA on Thursday, August 07, 2008

Crutchfield Customer Review (What's this?)

Great wireing kit, i installed it for a 800x2 fosgate amp going to a 15w3
sub. i have an 08 civic LX coupe, the cables all made it to my trunk with
plenty left over. The crutchfield amp install guide is not car specific and very basic, i highly recommend you google a DIY (do it yourself) guide that
someone has come up with for your car. I found one that is complete with detailed pictures and instructions for running cable to my trunk without having to drill any holes in fire wall or anywhere else. took about 1.5 hours to install.

Great amp kit

Written By Chris, Woodbridge, VA on Thursday, June 19, 2008

This kit was perect to hook up my sub amp great kit comes with everyhting you need thanks alot and very fast shipping

Incredible Buy

Written By Grady IV, Memphis,TN on Wednesday, May 21, 2008

Crutchfield Customer Review (What's this?)

I'm blown away by the ease of use of this kit. Since this was my first install I was hesitant at first, but Mike @ Crutchfield gave me the pep talk that I needed. It comes pretty much everything you need including wire ties and misc. parts needed for install. Very nice quality and well put together.

EFX 4-gauge Amplifier Wiring Kit

Written By Michael, Succasunna, NJ on Thursday, May 15, 2008

Crutchfield Customer Review (What's this?)

I have had two of
these installed in
my car for a while
now. Good for a
cheap kit, but the
wire covering
separates from the
ends of the RCA
patch cables, the
RCA cables don't
block signal noise
well, and the fuse
box on the blue
power wire is
annoying. Worth it
if your short on
cash and want to get
your stuff installed
asap, which is what
I did. I upgraded
the RCAs to
Streetwires's Zero
Noise 5s and I am
much more satisfied
with the quality and
signal noise

First Time Installing An Amp

Written By Steve, Montrose, Co on Monday, April 28, 2008

Crutchfield Customer Review (What's this?)

I have never installed an amp before and this kit was perfect. My kit came
with an extra fuse even though another reviewer says his did not. There
were plenty of zip ties and the lengths of the wires were perfect (of course
I measured before I purchased). The only real pain in putting in the amp is
finding a good spot to go through the firewall. I found a boot that housed
some other wires that I routed it through but I had to punch a hole through
the boot.. it actually worked out well, it created a nice seal.

I followed the Cruthfield instructions along with the instructions on the
wiring kit and it was smooth sailing. The installation looks professional and
I did it myself.


Written By Zak, NH on Wednesday, January 23, 2008

Crutchfield Customer Review (What's this?)

awsome works well

Great price, for a good kit.

Written By Phill, Daytona, FL on Tuesday, September 18, 2007

Crutchfield Customer Review (What's this?)

This kit comes with everything needed to install an amp. The only thing you need to buy is speaker wire, which you should buy separate anyways. The kits normaly come with cheap thin wire. It comes with the fuse you need, and everything else you can think of. Great buy!

I am quite satisfied

Written By t_quirk, Detroit, MI on Saturday, May 12, 2007

I do wish they included an extra fuse with this kit. Other than that, everything is beautiful. As long as you read the Crutchfield directions with this kit, you should be fine. Use as short a ground as possible, route the signal wires on the opposite side of the car from the power wire. The casing for the power wire along with the fuse holder looks great in the engine compartment. Just *make sure* you have the power wire inserted into the fuse holder properly or you won't be able to tighten the allen screw far enough and you will have problems putting the cover on the fuse holder. I still give this kit 4 stars because all the wiring is of high quality and I have no signal noise. Have fun!

Great Package

Written By Abhi, Minneapolis, MN on Thursday, May 03, 2007

Crutchfield Customer Review (What's this?)

Well, I just bought this product and recieved it in a beautiful package. Personally after installing my first stereo in my first car, I neither have the time nor the patience to install it in my second car. Got to give it up to Crutchfield for fast delivery and since it arrived with all my other items recieved free shipping too.

Nice wiring kit for the money.

Written By Chris, Beaver Dam, WI on Tuesday, April 10, 2007

Crutchfield Customer Review (What's this?)

Very nice kit, includes everything needed. You only have to crimp two ends for connections which will save your hands big time. Highly recommend over 8 guage wiring. Only thing you will need is better zip-ties. The ones provided are junk and break easily.

Good Quality Product

Written By Mark, Rhinebeck, NY on Friday, March 09, 2007

Crutchfield Customer Review (What's this?)

Used this kit to install a Profile HA1040 AMP. The 4 gauge wire was tough to crimp, but using a vise or vise grip gets the job done. One thing to be careful of is where the power wire goes through the firewall. Be sure to plan carefully. If you need to drill, get a grommet from Crutchfield to fill the hole. If you use and existing hole, be sure you have access on both sides to feed wire. (I know this is all common sense, but a little planning can save you a lot of aggravation.) Mine went smoothly in a 1997 Tahoe. Everything else was a snap!

Excellent Value

Written By Andrew, Bedford, TX on Thursday, February 08, 2007

Crutchfield Customer Review (What's this?)

I used this kit to wire up an Alpine MRP-M650 amp. All I can say is Wow! 4 ga. amp kit for this price is a great deal. All cables were long enough for the install in my '02 VW GTI. One warning though, be sure to have the proper tool to crimp connectors over 4 ga. wire.

Cool Blue

Written By Chris, Wichita, Ks. on Sunday, January 07, 2007

Great wire for a 1200 watt amplifier, and 2-800 watt 12 inch subwoofers in a bandpass box. Much better than the 200 watt max amp wiring kit that I had connected to the amp at first. Kept blowing fuses. Wonder why. Funny. The connectors to this thick 4 gauge wire, although quite tough. I've found that a good set of vise grips will flatten them against the wires.

Easy to install

Written By John, Des Moines, IA on Thursday, October 12, 2006

Crutchfield Customer Review (What's this?)

This was my first amp install & it went smoothly.

Pros: 4g kit @ low price. Almost everything you need is included. Plenty of wire & extra items are a nice touch.

Con: The 4g wire connections that need to be crimped are hefty. My standard crimper was not big enough to do the job & the connectors too tuff for pliers... Get a crimper big enough to handle or be prepared to get creative.

Bottom Line: Good kit for a great price. Wish the connectors were easier to put on or kit came with a tool.


Written By Mike, waldorf, MD on Wednesday, October 04, 2006

first thing, it did not come with a fuse. Second, If you do not order an AFS fuse when you order this good luck finding one. I had to dig up and old fuse holder and swap it onto this wire. I still give it a 3 because the RCA's seem pretty decent and it was 4 gauge wire so they did at least get that part right


Written By Art, San Diego, CA on Friday, July 28, 2006

Crutchfield Customer Review (What's this?)

Almost everything needed came in the kit. The kit is great. Although the only problem is with a 4-gauge wire, there isn't any crimp tools easily found available and cheap. So... If there is room for improvement... They should either crimp/solder the connectors on BOTH ends, or provide a cheap set of crimp tools for monstrous wire! Other then that. It's perfect!

One of the components for my system

Written By B-rad, Akron, Ohio on Friday, July 21, 2006

Crutchfield Customer Review (What's this?)

The kit was complete in as much as it had things in it (terminals) I didn't even use. The length of cable was good and I had plenty to use in my Jeep Cherokee. I am running two 8" JBL GTO subs driven by a 1200 watt amp., and everything is pumping just fine.

It works

Written By Cole, South FLA on Monday, June 05, 2006

Crutchfield Customer Review (What's this?)

It worked in my lincoln tc, I liked the blue color. The only thing that would have been better was if the remote was held in the patch cables... but thats just a preference.

It works, buy it.


Written By tony, NORLINA,N.C. on Tuesday, May 30, 2006

Crutchfield Customer Review (What's this?)


Hands-on research

What's in the box?

Download owner's manual

  • 17' Stereo RCA interconnect cable
  • 16' Four-gauge blue power cable (installed on amp side of fuse holder)
  • 1' Four-gauge blue power cable with ring terminal (installed on battery side of fuse holder)
  • Waterproof in-line fuse holder
  • 100-amp AFS mini wafer fuse
  • 2 Mounting screws (for the in-line fuse holder)
  • 4' Four-gauge silver ground cable with ring terminal on one end
  • 17' Eighteen-gauge blue remote turn-on wire
  • 6' Length of flex loom
  • 6 Plastic wire ties
  • Two 4-gauge crimp-on spade connectors (one red/one black)
  • 2 Red 18-gauge crimp-on spade connectors
  • 1 Plastic grommet
  • 2 Red butt connectors
  • "Scosche" sticker
  • Instructions

Product Research


Compatibility: The PA41 kit is designed for amplifiers with fuse ratings up to 100 amps.

Kit Contents:

  • 17-ft Stereo RCA interconnect cable
  • Waterproof in-line fuse holder with 4-gauge power cable attached (width: 3.230", height: 1.082", depth: 1.959")
  • 100-amp AFS mini wafer fuse
  • 1-ft 4-gauge blue power cable, one end attached to fuse holder, the other end has a ring terminal (0.655" outer diameter, 0.315" inner diameter)
  • 16-ft 4-gauge blue power cable, one end attached to fuse holder
  • 4-ft 4-gauge silver ground cable with ring terminal on one end (0.655" outer diameter, 0.315" inner diameter)
  • 17-ft 18-gauge blue remote turn-on wire
  • 6-ft length of flex loom (0.561" diameter)
  • 6 Plastic wire ties (zip ties, 7-3/4" long)
  • Two 4-gauge crimp-on spade connectors, one with a red insulator boot for power and one with a black insulator boot for ground (0.367" outer width, 0.216" inner width)
  • Two 18-gauge crimp-on spade connector with red insulator boots (0.257" outer width, 0.168" inner width)
  • 1 Plastic grommet
  • 2 Red butt connector
  • Two 1/2" Mounting screws for the waterproof in-line fuse holder
  • Scosche sticker
  • Instructions

Note: All power cables have Oxygen-free high-conductivity wire for maximum power flow.

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 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.