Customer Ratings & Reviews

Excellent car audio power cable

Excellent product. Easy to work with. I bought two sets so I could wire a four channel amp and have extra power wire to do a "big three" wire project under the hood. Highly recommended.

Excellent qaulity.

Excellent product. Great build quality. True to Gauge. NO B.S. specs. The fuse holder is a little tricky.

true

I love this wire it's so much better than my old 4 gauge wire. I put it next to the 4 gauge i bought from a local audio store and the rockford wire was twice as big and way more flexible. Everything in this kit is amazing and it is def worth the price.

amp install kit

very nice kit for the price paid. wire is extremely flexible for gauge. power wire is long enough to go from battery at the front of the engine bay, through the firewall, under dash, under the carpet, down transmission tunnel, under rear seats, into trunk and still have 2 feet to spare. this was done on a 93 chevy beretta, so bigger sedans and suvs may need more wire. i'm very pleased with this kit and would buy again

A Must Have!

No more dim lights and great sound quality!!!

Rockford Fosgate RFK4I Review

All i can say is wow. Unbelievable power delivery and a crisp clean signal with no distortion or signal loss issues. RF has always been amazing with their products and this kit just adds to that reputation.

Good Wires

Good wires, i like them. They do a good job. They are a lot of money but you get what you paid for, cant go wrong with Rockford products.

Awesome!

like most said the fuse holder was awkward and a little tricky.. but besides that everything is great!

Good Deal!

Good quality at a good price, shipping was good and quick as well.

amazing amp kit

really flexible and bendy and performs much better than anything else

HIGH QUALITY! GREAT BUY!

Great Great Deal! RF's Cables are nice!

Pro:
Really Flexible
Price
HIGH HIGH QUALITY CABLES (i was surprised.)
It looks like licorice. (seriously!) :)
Pre-Attached Fuse Holder and Terminals

Cons:
A different fuseholder would be nice because it just sticks out and was more of a hassle to try and get it in.

Must have piece of equipment!!!!!!

This Rockford Fosgate capacitor is a must have if you are into custom stereo equipment ,there are only pros except for having to buy it that's the only con and even the price was great so that's not too bad !! There's a digital reading that shows your amps which allows you to know when your battery is getting low or if your alternator is about to crash , I had a system with 750 watts rms prior to buying this cap and after installing it i could turn it up loader without my battery being drained and the headlights dimming !!!!! Like I said A MUST HAVE!!!!!!

trusted brand

i have a mrp-m500 powering a 12" type r and im having less dimming and a slight difference of louder bass. if your pushing less than 1000 rms id recommend it. before when i didnt have this cap my headlights and lights on the dash would dim ALOT. now my electrical system for my car runs smooth, my speedometer is brighter and my headlights. but my headlight do dim just a little. btw im running with a stock batt. alt. and no big 3.

Fosgate Performs

This works like a champ! I have this hooked up to a HiFonics 1200 Brutus amp, pushing 2 Rockford Fosgate 12 inch P1's. No light dimming at all. No lacking in amp power ever! Didn't have to upgrade my alternator or battery with this bad boy. And it lights up blue to match my amp lights. Buy this product. Nothing but good things.

Impressive

I am always the one to say alternator, alternator, alternator. However, for my specific application, an aftermarket alternator was not an option. I am pulling roughly 70 amps of current and my 130 amp alternator was struggling to keep up even with the Big 3 in all 1/0 OFC and an Optima Yellow Top Battery. After adding this capacitor, my voltage stays above 14 volts all the time. I guess capacitors only work if you buy the best, rockford is awesome. On a side note, make sure you provide your amp and capacitor with separate grounds rather than utilizing the ground distribution block on the capacitor.

They help when you have a charging system that can keep up

I like to tell people alternator alternator alternator. In my case it's two stock 130 amp 3G alts. 2 mb quart reference amps strapped putting out 1600 watts rms. and I have 2 70x4 amps playing active biamped jl c5 components. I didn't have a problem with low voltage when I cranked my stereo I had a problem with the lights dimming when the bass would hit and the quick spike would come and go making my voltage gauge dance, and my lights would flutter. With the addition of two capacitors the voltage is much more stable. The amps take the power stored in the caps when it hits and the feed of power progressively rolls back in to charge the caps acting like a buffer. If your charging system can't keep up In the first place a cap will not help you.

Never backs down

I've sat in my car for almost 2 hours before with the car off, just blaring my system, and my battery was just fine. My lights don't dim when it hits and I'm pushing 3,000 watts into 2 JL's. This rocks, 5 of 5.

Very good, a little pricey though

This cap is truly one of the best. Built very solid, never had a problem of any kind with it. It is a little pricey, i think, for a 1 F. But if you want the best, and your system isn't too massive, go with this one.

Quality Product

First off it does what it says and is a very solid cap kept my voltage steady and did improve on my bass sound quality the led voltmeter is also very nice. Its easy to install and will fit 0 gauge wire I charged it with a 12v car lightbult like the ones from the taillights.

Overall I would recommended this for small sound systems and to make your setup look better.

Fantastic Performance!

What can I say, this large beast (Don't be fooled by the battery appearance, it's about the same size as my biceps!) has done me well. Never skips a beat, sound is always crisp, clear and precise.

Features: It is a capacitor, has a little LED thing that shows voltage. Comes with capacitor installation kit so you don't turn your fuse box into the 4th of July.

Good Buy!

This Rockford Fosgate capacitor is a must have I own 2 for 2 different systems. Keeps lights from dimming, Two system at 1600 no problems at all!!

4 SURE WORTH IT!

I just got my system installed about 2 weeks ago and this really helps a lot. It maintains the cars voltage and keeps my 2 12" p3 subs going full tilt. Excellent buy.

Must Have!

This capacitor is a must have for any system! I'm running two amps off of it actually for ~700 watts RMS and I haven't had any problems. It's hooked in parallel with my system, connected to my distribution block and grounded to the frame. I didn't use the charger to charge it as it said. I just let it charge itself when I connected the battery back up. Just be careful, that's a lot of juice stored up!

awesome

This amp kit is awesome! very thick pure copper wire. runs very clean, power keeps my system knockin. the fuse holders a lil tricky.. overall would recommend 10 times to anyone. Great price as well

Great!!

Personally I never had a thing for capacitors. Unfortunatly due to a low budget, I couldn`t afford the "big three" or even a new alt... but Rockford does exactly what it`s supposed to do. The sound quality of my Type R is way better than it was. Completely cancelled out all the dimming too! I think people get the wrong impression about the capacitors... by no means should it make your sub louder. It's not a miracle machine its honestly a cheaper solution to fixing the issues that our unnecessary and booming systems throw at us! Not every one has the money to buy a beefy alternator or top of the line battery. Any way, like I said.. it does what it's supposed to and i highly recommend this product. Looks sweet too!

Excellent

It is working pretty well. This brand is the best on wires, so No complains

Rockford Fosgate RFK4I

I purchaced these cables a while back to upgrade with more power and work great seller got them to me wery quick and works great. And best price I could find. Lot better than local store. These guys are the real DEALS!!!

Great little unit

The unit is exactly as advertised and makes a great small package sub for any car where space is an issue. It was easy to install and works great - I installed it in a 34 foot motorhome and I could have used a little more power, but it does the trick and I am satisfied.
Pros: ease of installation, size and appearance
Cons: could use a little more power

Rockford Wire

I highly recommend this wire kit! I have it hooked up in my 99 chevy silverado with a kenwood 9105d and JBL GT5s in a sealed box and it's amazing. The wire is defintly full 4 guage. Not copper over aluminum like most cheap brands are. A 4 guage copper over aluminum is like 8 guage true copper. Having proper wire is essential to reaching maximum ability of your amp. If your amp cannot receive the full amount of power then it will overheat and stop working. A good wire kit is a safety investment in your car audio. This is a great kit for the price. Everything you need to hook your amp up. You get what you pay for. Don't get cheap wire and risk your amp, subs, and car battery. Overall great kit and would recommend friends buying!

Great value & fast shipping!

Very good 4 guage wire, pretty much everything what you need for a subwoofer amp wiring... very pliable wire, easy to hide under the carpet. I hook it up to a friend of mine, no sweat :) Sonic has a good deal compare to other retailers. I you've got extra cash, take kicker, the blue one. It is thicker and silver tinted... the one im using right now. :)

quality product

I'm no car audio buff but this works fine for me.

Great Product

Easy to install + high quality components for a basic setup.

RFK4I

this wiring kit was perfect. high quality wire and more than enough length for my 4runner with the amp all the way in the back. i would definitely recommend this kit to anyone

Hey I got RF Amp Kit

OK, got this in today and i ordered it yesterday So Great Shipping and Very Fast, but the wire seems to be under spec and it doesn't stand up to their 4 awg claim, the wire i got at a audio store for cheaper had more copper then this kit, maybe its just this kit, that doesn't stand up to the specs because it is the cheaper one of RF Kits, but for 54$ bucks it is a good deal, the wire is very flexible and very easy to fit in tight places, and i would recommend it to first time installers because, it can make it a lot easier for you, but to other installers look else where, With this kit your just paying for the RF name

Does as advertised!

This product seems to perform as intended. I am satisfied with my purchase.

top quality

just recieved these a couple days ago and compared it to my other 4 gauge kit from stinger, the difference is insane. this stuff is amazing soooo soft and bendy even better than licorice. none of these other brands that make amp kits come even close to the quality and performance of rockford.

High quality cable!

Excellent product! The positive wire was ready to install right away with no crimping involved. Just had to drill the hole a little larger. The cable is very flexible, durable and is true to it's size rating! Rockford Fosgate did a great job in producing a quality product.

Great product

Never had any problems with this product and if I get a new car I would not settle for less.

great value

I already have 3 of these, they are the best product for the money! Take it from sonic, fast shipping too! I like the maxi fuse holder and all the terminal rings included.

best wire

There is no substitute for this wire this is the quality stuff a competition system needs. I want all fosgate for my wires and RCA's.

Great Quality

I bought these to power an RE SE-X 15 hooked up to a Sundown amp at about 800 RMS. Let me tell you, these cables are GREAT quality. Definitely 4 AWG wire, and plenty of it, enough for me to cut off extra and use it for a "big 3" upgrade. Wires are very flexible. RCA cables are high quality. Im gonna use home stereo speaker wire for my setup so this was perfect. Only flaw is the fuse. Because the fuse-holder uses a MAXI fuse which is very large, it sticks out the side of the fuse holder. Although, this makes for easy inspection of the fuse. Overall a very clean and high quality kit.

nice cap better price.

love it cut down on my light dimming greatly. i still had to do big 3 upgrade because i was runnin jl 1000/1 and 13 w7. great for systems under 1000 watts rms!

Great product !

Excellent, no more dim lights.

Rocford Rocks

The kit comes with everything. The wire is all super flexible, so it is easy to fit in tight places in you're vehicle.

Good quality. Not a complete kit though

This kit only came with ring terminals for one end of the wire. It would be nice if it included a terminal for the other end of the cable!

Good Wire

I got this for 2 12" inch 1200 watt Sony Xplods. But anyways this wire was a charm and haven't had any problem with it.

great product

I have a 500 watt alpine mono amp powering 2 rockford Fosgate 15 inch p1s wired to 2 ohms and this cap works great. Highly recommended

NICE

Good amp kit. Includes everything thing you need.
Real 4 Guage wire!

Speedy Shipping!

Sonic always ships there products out very quickly. They are my favorite so far, and I have delt with other e-bay stores. This product does exactly what is listed. You won't be disappointed. I know I was'nt.

Great Price and Performs Perfect

A must to have when pushing Amps, especially with all the electronics... Lights don't dim when the bass hits.

best thing i ever bought

Very flexible wires easy to put the fuse in only down side that i dont like is how big the fuse holder is and that the fuse sticks out like it does but other than that very great product wouldn't think about buying anything otha kind specially for this price fastest shipping ever

Good Stuff

Works great and I love it. The only thing I did not realize is the digital readout never turns off regardless if you vehicle is on or off, so at night you can see a blue light coming from within the inside of my truck and its pretty bright. The only reason I do not like this is I have had my truck broken into and robbed, so I do not like the blue light attracting the unnecessary attention, but when I'm in sketchy places i just throw a shirt or jacket over the capacitor to block the light.

great!

i love this amp kit! would be awesome for the price if it would have speaker wire but i already had some so it is all good. anyways it powers the system so I'm happy

Best

Had off brand, kicker, etc. Nothing lives up to rockfords wires. Measured and it is 4awg power and ground. Not thick insulation and powered my 2 kenwood kac-904d perfectly. 1800 watts was a little much for 4awg but anything under 1500 would work great.

Greatest For The Price

I purchased this product from B*** B** and i paid twice as much. I wish i would have purchased it at Sonic Electronix for half the price!!!!

Overall, it is a great kit. came with everything but speaker wire, but it was thick enough and it powers my 1000 watt RMS amp.

I liked it

I would recommend this product to anyone installing an amp. The power and ground wires are really nice quality wires. The whole kit is just a nice put together kit. Love it

Great Product

I would strongly recommend this product for anyone needing this particular piece of equipment. It arrived as it was advertised, and has been working great since I installed it. It's a great choice!

Great Value!

I wanted to install my own sound system in my Dodge Dakota and wanted to do it right. I bought this kit based on other reviews and because of the quality Rockford is known for. After getting this kit and using it, I can say it's all very high quality. I have been using my system now for over 6 months, no issues!

Amp Wiring Kit

This kit did exactly what I needed it to so I could hook up my amp. There is plenty of cable to run from the battery all the way to the back of the car and all the needed accessories are included. I would highly recommend this kit.

Great Kit. Good Value

Installed in a 2007 Chevy Trailblazer SS and a Pontiac Torrent. All wiring was long enough to reach the rear tray nicely and the quality was great. Everything I needed to get my MTX amps and Alpine subs bumping again was in the kit. Did need more zip ties but those are cheap. Sounds great and better than the low grade CCA autopart store kits for a similar price. If you are debating price versus quality this is a clear winner in both categories. Signal RCA's didn't look too robust but have not had any issues.

Amazing

I have my kenwood amp pushing out 500 watts bridged mono and i use to dim my headlights and neons like no other. Since i installed this cap, my lights don't dim, i get more bass, and i get too many complements on how my set up looks with it next to my amp. The install was easy, painless, and charging it up was nothing. all in all, this cap is the cap you want.

Great Wire Kit

The quality of Rockford Fosgate is undeniable. These wires deliver the power I need with no problem at all. System has a crisp clear sound and I am very satisfied.

Works good

No problems with it, works perfect still after about 5 months.

Good Amp Kit

Everything was good except no speaker wires.
High quality wiring and insulation.
Highly recommended.

Rockford fosgate RFK4I

True wiring for such the right price sonic does it again best low prices

By jason on June 21, 2015 Verified purchase

Works great.

Great product. I would not buy this thinking you are gonna stop dimming lights. You buy this to save your cars electrical system. Came with a great charging board. It doesn't light up when charging. So just wait for the light to go out before throwing your fuse in.. Great product. I'm running this on a Sony gsx gs100. Amp to 1100 watts on a regular p3 sub, with 2p3's on a soundstream amp with a stinger 5farad cap.

Rockforf Fosgate 4 Gauge Kit

This is a nice kit... True 4 gauge... really easy to work with.... really flexible... all in all a great product...

GREAT WIRING KIT

This kit works great. I used it to power my alpine 1000 watt amp. Easy to install. Don't waste your cash on cheap kits from w*****.

great quality!

These wires are awesome...The quality is great and it really utilizes all of your amp's true potential power.

RF 4 gauge

This product is great. Just got it in the mail. One of the things is that the Rockford wiring is very nicely insulated, most people wont see that. Its very flexible. They give you a honest product with 1600+ strands in that copper wiring.

Hmmm...not ENOUGH

So i got this kit because its RF and 4 AWG, sounds good to me, but it didn't have all the terminals necessary for complete amp installation. Overall its an alright kit, but i would recommend spending a little more on a higher end wiring kit.

Its wire hehe

Well nice and easy to install, downfall of it all is the price and an ok fuse holder.

Battery Saver

This is a must have piece of equipment for every stereo system that has an amplifier!!!! I always had an issue with my electrical system, until now. Now I have no issues at all in fact I my headlights dont dim and it feels like my bass has a harder hit to it, and I thank sonic for that !!!!

Great wire

I would recommend this product it is very nice high-quality wire.

The perfect kit

I will always buy RF wiring kits. They never disappoint and the wire is more like 3 gauge!

By Adam on April 24, 2021 Verified purchase

Rockford Fosgate RFK4I 2-Channel/Mono Amp Wiring Kit

Great amp kit high quality It's Rockford Fosgate! Best of the best.

By Anonymous on May 25, 2018 Verified purchase

Great value

Great product for the money. Quality amp kit. Everything I needed for my setup. Would buy again.

Pricing is great

Best kit out there for people not wanting to waste a lot of money. Plus shipping was next day free. Overall great quality product.

Awesome buy!

Did what it was made to do!
Only downside is the fuse-holder, I have mine zip tied in the holder.

Rockford Fosgate RFC1D 1 Farad Capacitor

This is A GOOD name brand cap for the farad and price

By Vonsalee on November 27, 2020 Verified purchase

great capacitor

Great build quality. Been using Rockford for over 20 years and they never disappoint.

By Branden on May 27, 2020 Verified purchase

Great overall

Profuct is great! I would buy two of them if I needed another

Great Rockford Quality!

I’m a huge fan of Rockford Fosgate and my entire car audio systems is comprised of all RF equipment, right down to the wiring, with the exception of the head unit. This is just another piece of their great equipment. Great digital readout, easy to use and easy to charge with the accompanying charging tool. Along with that, it works great and also looks really cool too and Sonic Electronix price was better than any other competitor!

great customer service

Very helpful in helping me choose the right one for me and advice on hooking it up preciate all your help thank you

awesome for a 1 fared cap

I would recommend this to all my friends 2 of my friends bought this cap after they saw what it did for my system I have two amps on this a jbl with 300 rms and a fli audio amp at 600 rms and this thing handles them both no problem (pros) great power and look great in my truck (cons) none