Expert Service 1-877-289-7664 [Hours]

Boom. SUBTEMBER is here!

Rockford Fosgate RFC2D

Hybrid 2.0 Farad Digital Stiffening Capacitor

In Stock. Only 2 Left!
|

List price $219.99

$139.99

with warranty

You Save: $80.00 (36.37%)

Arrives by Thursday, Sept. 25 to zip 20147

Add an Extended Warranty

Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

In Stock. Only 2 Left!

Arrives by Thu, Sept. 25

Get FAST answers from customers ASK a Question See questions answers

  • Hybrid 2.0 Farad Digital Stiffening Capacitor
  • Delivers constant power to your system
  • Increases quality of sound
  • Increases level of bass
  • Reduces dimming headlights
  • Platinum plated
  • 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.
2 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.
4 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.
4 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

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
67%
4 Star
33%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.6
Features
4.5
Design
4.8
Usability
4.7
Jesus

Santa Ana, CA

Overall
Durability
Value
Features
Design
Usability
BRAND OR NOTHING

November 8, 2011

I recently order mine from Sonic. Got a great deal on it with the make an offer option. Seriously not alot of sites have it, really cool and definitely worth the price. This ROCKFORD FOSGATE capacitor is the best-selling one on this page. Bought mine a couple weeks ago when it was limited stock. Checked a few days later an it was in stock, an a few days after that back again to limited stock. WOW they speak for themselves. Overall the capacitor is clean... THE BEST THAT MONEY CAN BUY.

4 of 4 found this helpful

Help our customers find the most helpful reviews

Jesse

Canada

Overall
Durability
Value
Features
Design
Usability
Good But...

June 16, 2014

This did not really fix my headlight dimming issue in my 96' honda accord. But running 2 amps and a 500w rms sub is a lot of power. I did notice that i was getting a bit more power to my sub and it sounded better! I still dropped to about 9.6 V on the lows

0 of 0 found this helpful

Help our customers find the most helpful reviews

piyush

Canada

Overall
Durability
Value
Features
Design
Usability
good cap

April 30, 2014

easy to install and works better than most caps, takes about 10 mins to completely charge first time, i had to purchase a 12volt positive negative charger to use the little charging device that comes with the cap, when u first connect that device that comes with it to charge it will give off some smoke but dont worry keep it attached, its supposed to do that i guess

0 of 0 found this helpful

Help our customers find the most helpful reviews

Thumper

LasVegas

Overall
Durability
Value
Features
Design
Usability
get it no regrets here

May 27, 2013

bought this a while back and it is STILL running strong even at max volume my T1 12 suckn 900rms i still dont dim and i hit harder then I could ever imagine on one sub. I love this cap and recommend it to anyone and everyone. I actually bought this because my buddy has one and he also never had any problems. FosgateForLife!

0 of 0 found this helpful

Help our customers find the most helpful reviews

trevor

limerick, PA

Overall
Durability
Value
Features
Design
Usability
Perfect

May 3, 2012

This cap is AMAZING. It helped the drain from my battery, and my head lights dimming. I love this cap, because it helped me not have to do a lot of upgrades in my car. If you are looking for a great cap worth the money. Well, you found it.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Chestybonds

Australia

Overall
Durability
Value
Features
Design
Usability
Great Quality

January 29, 2012

I would highly recommend this cap to anyone considering a system upgrade, I am very pleased with the performance of this cap, the amp seems to have loads of power to when the low frequencies and transient highs are presented most of all no dimming of headlights. Good work Rockford, nice looks as well.

0 of 0 found this helpful

Help our customers find the most helpful reviews

d

Louisiana

Overall
Durability
Value
Features
Design
Usability
great product

September 22, 2011

Like all Rockford products this one all so full fills its duties. I have never had any problems with it and the price is not bad. All u have to do to have a great system is get rid of anything that is not rockford, and replace it with Rockford.

0 of 0 found this helpful

Help our customers find the most helpful reviews

LURKN LSS

Milwaukee,Wisc

Overall
Durability
Value
Features
Design
Usability
One of the Better Capacitors

March 12, 2011

I have this capacitor hooked up to two 12" Alpine Type R's. With a Alpine MRP-2000. I had a lot of dimming before I got the capacitor so I decided to buy this one. After I got the capacitor all I can say is WOW, you could tell right away that the Subs hit harder and louder. They also hit notes and the sound would last longer before going quiet. The cap itself looks really cool and is built really solid. The mounting brackets are plastic but as long as you mount it in a good spot it will be fine, the digital display also looks really good. I also have a optima yellowtop battery and a high output alternator. If you have a capacitor and you still have dimming its probably because your alternator isnt putting out enough power.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Justin

Marlborough, MA

Overall
Durability
Value
Features
Design
Usability
Good

January 26, 2011

Does what its expected to and makes a nice addition to the system! lights don't dim and subs stay powered with no loss of bass!

0 of 0 found this helpful

Help our customers find the most helpful reviews

brando

clovis, ca

Overall
Durability
Value
Features
Design
Usability
Great!

February 18, 2010

Does just what I expected, no more "BATTERY" & "CHECK ENGINE" lights on bass hits! although is was kinda cool, my suv would freak out until i got this.

0 of 0 found this helpful

Help our customers find the most helpful reviews

thomas

ocala, FL

Overall
Durability
Value
Features
Design
Usability
awsome

November 4, 2009

great cap kept my lights from dimming an never had to upgrade to a bigger battery or alt. def does the trick

0 of 0 found this helpful

Help our customers find the most helpful reviews

Brent

Hawthorne, CA

Overall
Durability
Value
Features
Design
Usability
Great product!

June 21, 2009

I love it! It does the job! My AMP gets all the help it needs out of this!

0 of 0 found this helpful

Help our customers find the most helpful reviews

Brent

Hawthorne, CA

Overall
Durability
Value
Features
Design
Usability
Suits me fine!

April 11, 2009

I like this product. It has helped alleviate issues concerning my power. It is clean and very effective.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Tyler

Orlando, FL

Overall
Durability
Value
Features
Design
Usability
Worth it

April 30, 2008

This capacitor does exactly what it is designed to do. It is heavy duty without having to pay the cost of the competition series like its competitors.

0 of 0 found this helpful

Help our customers find the most helpful reviews

mike

phili, pa

Overall
Durability
Value
Features
Design
Usability
good product

December 24, 2009

well i'm not exactly sure what i expected but my headlights still dim at night when the bass hits...it's advertised as a red LED lighting but i got blue..its ok, i think blue looks better anyway...i think this product works fine, the only issue i have with it is that the bracket isnt very strong, i have it mounted on the backside of the rear seat and the bracket broke down the middle so now the cap is loose in my trunk...

0 of 2 found this helpful

Help our customers find the most helpful reviews

Accessory Tools and Products

Accessories added

Scosche Ring Terminal (1/0 AWG)

Pair of 1/0 AWG ring terminals with 3/8" hole and red and black insulating sleeves.

Your Price $3.99

Streetwires Ring Terminals (1/0 AWG)

Pair of 1/0 AWG set screw power ring terminals.

Your Price $17.95

NVX Precut Power/Ground Wire (1/0 AWG)

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

Your Price $29.99

NVX XW0BL20

20 Ft Pre-Cut Piece of 1/0 Gauge EnvyFlex Power or Ground Wire

Your Price $84.99

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 4 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
These are some amazing caps. Never had any issues with it.
Dennis M on Sep 11, 2014
my buddy told me to
Noah S on Sep 5, 2014
Reduce power drop at amp due to resistance of wiring from battery.
Marte C on Sep 8, 2014
I chose to purchase this item because of the positve reviews about the performance of this product. This item was also relatively cheaper than at other stores/websites.
Roman L on Aug 4, 2014

Product Summary

Manufacturer

Model Number

RFC2D

UPC

780687325022

Weight

4.00lbs

Internal SKU

rfc2d

Internal Product ID

9847

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 RFC2D