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Boss CAP4C

Chrome 4.0 Farad Digital Capacitor

In Stock
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List price $119.99

$59.99

with warranty

You Save: $60.00 (50.00%)

Arrives by Thursday, Sept. 4 to zip 20147

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When heavy bass notes in your music hit, the current demand on your system greatly increases and could cause voltage drops. This stiffening capacitor acts as a power reservoir, instantaneously supplying added power to keep your system playing strong.
  • Chrome 4.0 Farad Digital Capacitor
  • Digital voltage level display
  • 20V DC
  • 24V Surge
  • Chrome finish terminals
  • Includes mounting brackets
  • Dimensions (without mounting brackets): 11"L x 3-1/2"W x 3-1/2"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's 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.
4 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.
Any Gauge with use of Ring Terminal 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.
Any Gauge with use of Ring Terminal 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.
Chrome
Width
The width of the item from left to right (side-to-side) measured in inches.
3-1/2"
Height
The height of the item, measured from top to bottom, in inches.
3-1/2"

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
76%
4 Star
12%
3 Star
6%
2 Star
0%
1 Star
6%

Average Attribution Rating

Durability
4.4
Value
4.7
Features
3.9
Design
4.5
Usability
4.5

Will

columbia, sc

Overall
Durability
Value
Features
Design
Usability

satisfactory

January 2, 2014

Good pruduct for the money. I have a 1000wt momo block D amp with 500rms on 2 1000wt 250rms subs and a 600t 4 channel amp on my mids. Lights don't dim any more unless I try to max it out, but I grounded my altenator better and it solved it.

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sam

Canada

Overall
Durability
Value
Features
Design
Usability

great cap for the price

December 23, 2013

nice cap works well did not stop lights from dimming but did help a lot would recommend to a friend

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Tom

Montello, WI

Overall
Durability
Value
Features
Design
Usability

Boss Cap4c is pretty decent!

October 1, 2013

Bought this cap and im running 3800 watts and i still have some light dims but nothing major if your gonna be running like 2200 watts RMS or less i think it can most defiantly do the job i still would recommend a dry cell but over all great buy for the cash!!!

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Jeff Engel

Omaha, NE

Overall
Durability
Value
Features
Design
Usability

Excellent Product. Excellent Price.

July 21, 2013

I have had this capacitor for 6 months and its functioning perfectly. Absolutely no problems. My headlights don't dim with the bass anymore. Unless I'm bumping my beats loud enough to bother the whole country of china.

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midwest loud

minnesota

Overall
Durability
Value
Features
Design
Usability

living loud no kickers

February 6, 2013

4th item from sonic i have it on a skar vvx 12 was making my brights be dims and my dims look like a flash light hooked it up with 4 guage never drops below 12 v and im pushing 1000rms thourly satasfied everyone talks crap about boss went over kill and 5* came with mounting brackets and a diode very simple design yet works 5* also have it hooked up to my ignition wire works every time!!!! also it beeps when its 2 stressed big plus!!!! 5* in all points

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Michael

Lanett, AL

Overall
Durability
Value
Features
Design
Usability

Great product

January 31, 2013

I got this capacitor for christmas and have it running two rockford fosgate p3d2 2ohm subs and I love it. The light behind the digits is bright, but kind of adds to it. I have actually got several compliments on the way it looks as well.

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Evan

Monrovia, CA

Overall
Durability
Value
Features
Design
Usability

Pretty nice product

October 17, 2012

It's built very solid and does its job like a champ. I enjoy many of Boss's products and this is one of the most valuable products you can install in your car.

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Ronald

Carthage, NC

Overall
Durability
Value
Features
Design
Usability

Its a bomb

September 13, 2011

At first it was working fine then i notice my lights started dimming after about 2 months. This Cap actually blew up like a bomb in my Jeep and my car wasnt even turned on. I wouldnt recommend this product.

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Braxton

Las Vegas, NV

Overall
Durability
Value
Features
Design
Usability

Get's the job done.

June 23, 2011

I have a 3500 watt RMS system and this Cap handles the power draw with ease. I've notice substantially less dimming from my head lights and more powerful sub-woofers hits.

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chris

tucson, AZ

Overall
Durability
Value
Features
Design
Usability

boss cap4c is a good buy

April 22, 2011

This cap is pretty big and does great with my 3k amp no more lights dim. Easy to hook up.

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Marcus

Orangeburg, SC

Overall
Durability
Value
Features
Design
Usability

looks good

April 15, 2011

great product and all, but on mines my display screen for me to read the voltage didnt work at all so i dont have a clue how much power is going through.....!!!!!!

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Jon-Jon

Philippines

Overall
Durability
Value
Features
Design
Usability

BOSS CAP4C

March 17, 2011

The CAP4C is a very versatile capacitor. It took me several weeks to read and compare the Capacitor with almost every capacitor on the website. When I decided to buy the product. I have no regrets. My Bass is clear, thumpin and my headlights no longer fluctuates. (it has been my problem before I bought the Capacitor. ) My Mids are clearer and it enhanced the over all Sound quality. The best thing about the capacitor, I don't have top worry about the battery drain. Very Easy to install and easy to monitor with digital reading. This is one of the best Items I bought from Sonic, affordable and for purchases on line no problem even if I live here in Davao City, Philippines. Mabuhay Sonic Electronix!

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Austin

Hartland Michigan

Overall
Durability
Value
Features
Design
Usability

HUGE!

January 10, 2011

This Cap rocks! my lights never dim now and it makes everything sound so much cleaner. but this Cap is HUGE! its almost the size of a 2 liter of soda. buts its an awsome deal and works amazing. Thanks Boss Audio and THANK YOU SONIC!

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Antonio

VA Beach, VA

Overall
Durability
Value
Features
Design
Usability

GREAT

March 26, 2010

THIS CAP WAS WORTH IT AND TOOK IN SOME WORK.......... it helped keep my 15's banging

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Tommy

Jacksonville, FL

Overall
Durability
Value
Features
Design
Usability

good cap

October 21, 2009

This was a really good cap i had no problems with it at all. Charged it right up and had it running and helping my lights not to dim since i was running so much power! Good buy!

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sokalas81

Ireland

Overall
Durability
Value
Features
Design
Usability

boss cap4c great value

July 11, 2009

its a great product.... its good for a small sound system you can get power from it........for me i thought i was a great for the price.......

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matt

manitowoc, WI

Overall
Durability
Value
Features
Design
Usability

Bigger than expected

October 6, 2008

in the pics it looks like about the size of a soda bottle or something and thats how long it says it is, but it is massive for a cap. it is more the size of between a 2 liter and 1 litre bottle of soda, but it gets the jobe done and does it well. it powers my 4000 watt power acoustik amp and powers it well. my dash lights and headlights never go dim. they always stay constant even while im bringin the juice.

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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

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Product Summary

Manufacturer

Model Number

CAP4C

UPC

791489108935

Weight

7.00lbs

Internal SKU

cap4c

Internal Product ID

13318

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: Boss CAP4C