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Rockford Fosgate RFC1D

Hybrid 1.0 Farad Digital Stiffening Capacitor

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List price $199.99

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$99.99

with warranty

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Arrives by Wednesday, Aug. 5 to zip 20147

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  • Hybrid 1.0 Farad Digital Stiffening Capacitor
  • Delivers constant power to your system
  • Increases quality of sound
  • Increases level of bass
  • Reduces dimming headlights
  • Platinum plated
  • Solid brass top helps reduce stripping
  • 1-year SonicElectronix.com warranty

Capacitor Specifications

Capacitance (farads)
Capacitors are rated in farads, and at times microfarads or millionths of a farad. The more farads the capacitor is rated at, the more electrical charge (and wattage) the capacitor will hold. Capacitance is defined as the property of storing an electrical charge between two separate conductors.
1 farads
LCD Meter Display
Displays the current voltage and/or other specification on an LCD readout.
Yes
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
1/0 AWG
Maximum Output Gauge Size
This number refers to the maximum size of wire that will fit into the output connector(s) of the capacitor, battery terminal, or any other connector with an wire output.
1/0 AWG
Built-In Distribution Block
A built-in distribution block simply means that the item includes a distribution block. The built-in distribution block will split the single power input into a multiple power output.
No
Primary Color
This is the main color of the item.
Silver
Secondary Color
A color that compliments the main color of the product.
Black
Illumination
This is the color of the illuminated LED lights on the unit.
Red

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
92%
4 Star
8%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
5.0
Value
4.7
Features
5.0
Design
5.0
Usability
5.0
Scuba Steve

Myrtle Beach,SC

Overall
Durability
Value
Features
Design
Usability
A Must Have!

August 20, 2011

No more dim lights and great sound quality!!!

40 of 70 found this helpful

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speakerhead

Sherman Oaks, CA

Overall
Durability
Value
Features
Design
Usability
4 SURE WORTH IT!

June 1, 2010

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.

34 of 62 found this helpful

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Rick

Simpsonville, SC

Overall
Durability
Value
Features
Design
Usability
Must have piece of equipment!!!!!!

February 18, 2009

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!!!!!!

38 of 70 found this helpful

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Jeremy

Bridgeton, NJ

Overall
Durability
Value
Features
Design
Usability
great product

April 27, 2015

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

15 of 25 found this helpful

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Christopher

Lenexa, KS

Overall
Durability
Value
Features
Design
Usability
Fosgate Performs

January 15, 2013

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.

32 of 59 found this helpful

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Warren

San Diego, CA

Overall
Durability
Value
Features
Design
Usability
trusted brand

August 3, 2009

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.

33 of 63 found this helpful

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Jeff

Petaluma, California

Overall
Durability
Value
Features
Design
Usability
They help when you have a charging system that can keep up

December 17, 2012

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.

31 of 60 found this helpful

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AudioPro

Utah

Overall
Durability
Value
Features
Design
Usability
Quality Product

January 23, 2012

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.

29 of 57 found this helpful

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Chris

NM

Overall
Durability
Value
Features
Design
Usability
Must Have!

July 29, 2009

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!

28 of 55 found this helpful

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Chris

Bellevue, WA

Overall
Durability
Value
Features
Design
Usability
Does as advertised!

January 3, 2008

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

26 of 51 found this helpful

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Keith

Shadyside, OH

Overall
Durability
Value
Features
Design
Usability
Never backs down

January 18, 2012

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.

32 of 64 found this helpful

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Nick

Fort Myers, FL

Overall
Durability
Value
Features
Design
Usability
Very good, a little pricey though

August 18, 2009

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.

31 of 62 found this helpful

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87' C10 Chevy

Alabama

Overall
Durability
Value
Features
Design
Usability
Great Price and Performs Perfect

May 9, 2012

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

27 of 56 found this helpful

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Ty

Glen Gardener NJ

Overall
Durability
Value
Features
Design
Usability
Great!!

February 6, 2012

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!

27 of 57 found this helpful

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Abiezer

Galloway, NJ

Overall
Durability
Value
Features
Design
Usability
Great product !

October 21, 2010

Excellent, no more dim lights.

28 of 59 found this helpful

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derrick

swansboro, NC

Overall
Durability
Value
Features
Design
Usability
Good Stuff

May 1, 2011

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.

24 of 52 found this helpful

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Maximillian

New Zealand

Overall
Durability
Value
Features
Design
Usability
Fantastic Performance!

October 24, 2012

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.

28 of 61 found this helpful

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Nick

Amherst, NY

Overall
Durability
Value
Features
Design
Usability
Good Buy!

August 18, 2011

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!!

32 of 69 found this helpful

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Spencer

Estherville, IA

Overall
Durability
Value
Features
Design
Usability
nice cap better price.

November 6, 2010

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!

24 of 53 found this helpful

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jake

Louisville, KY

Overall
Durability
Value
Features
Design
Usability
Impressive

October 3, 2013

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.

29 of 64 found this helpful

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Bill

Phoenix, AZ

Overall
Durability
Value
Features
Design
Usability
Battery Saver

August 19, 2008

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 !!!!

18 of 42 found this helpful

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byron

Phoenix, AZ

Overall
Durability
Value
Features
Design
Usability
Works great.

August 19, 2014

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.

25 of 58 found this helpful

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Kurt

Grand Island, NE

Overall
Durability
Value
Features
Design
Usability
Amazing

December 4, 2007

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.

24 of 56 found this helpful

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Great

Canada

Overall
Durability
Value
Features
Design
Usability
Great Product

April 25, 2013

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!

20 of 49 found this helpful

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Accessory Tools and Products

Accessories added

NVX Precut Power/Ground Wire (4 AWG)

5 ft. of NVX's HyperFlex power/ground cable with high-current transfer and blue insulation.

Your Price $15.99

Directed DEI Resistors (15-Pack)

Pack of resistors with various values (ohms) perfect for the initial charge of your capacitor.

Your Price $1.99

Browse 1 question and 2 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
had good reviews and its a good quality brand
Larry Z on Jun 25, 2015
to replace an aging 10 yr old Stinger 1 Farad Cap
Monte T on Nov 11, 2014

Product Summary

Manufacturer

Model Number

RFC1D

UPC

780687325015

Weight

4.00lbs

Internal SKU

rfc1d

Internal Product ID

9859

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate RFC1D