Make your amp run more efficiently with car audio capacitors. Find a wide selection of cap sizes including 1, 2, 3 and 5 Farad.

Capacitors

Car audio capacitors are a great addition to any aftermarket audio system that is in need of a little extra power. Capacitors store a temporary electrical charge that can be released during periods of extra power strain. If a vehicle has dimming headlights when music is played, a capacitor could solve that problem.
Get The Right Capacitor
Reduce the strain on a vehicle's electrical system.
Read Guide
1 - 1.9 Farad
2 - 2.9 Farad
3 - 4.9 Farad
5+ Farad
Capacitor Accessories

Top Sellers in Capacitors

2.0 Farad Capacitor with Digital Red Display, Perfect for systems up to 2000W

• 2.0 Farad Power Capacitor
• Perfect for Systems up to 2000 Watts
• Audible Warning
• Red Voltage Display
• Mounting Brackets Included

$29.99

IN STOCK

2 Farad Capacitor w/ Digital Display

• 2 Farad Capacitor with digital voltage display
• Red Digital Voltage Display
• Audible warning tones

$24.99

IN STOCK

3.5 Farad Capacitor with Digital Voltage Display and Audible Warnings

• 3.5 Farad Capacitor
• LED Voltage Display
• Audible Warnings
• Color: Black
• Rated Voltage: 16V DC

$34.89

IN STOCK

Package Includes 2 Farad Cap + Premium 0 Gauge Wire Kit

• 1/0 Gauge Complete 2-Channel Amplifier Installation Kit
• ANL Fuse Holder With A 150 Amp ANL Fuse
• For Car Audio Systems Up To 1500 Watts RMS
• Premium Powerflex Power And Ground Wire
• Helical Twist Construction Audio Interconnect RCA Cables
• 30% Copper CCA Wire
• 2.0 Farad Power Capacitor
• Perfect for Systems up to 2000 Watts
• Audible Warning
• Red Voltage Display
• Mounting Brackets Included

$59.98

IN STOCK

Energy Storage Reinforcement Capacitor with LED Voltage-Display

• Increases quality of sound
• Increases level of bass
• Platinum plated

$146.99

IN STOCK

Digital Capacitor 3.0 Farad Distribution Top

• 3.0 Farad Digital Capacitor
• Voltage Meter
• Impact Resistant Polycarbonate Cover
• Simple Mounting System

$59.97

IN STOCK

  • 4.6
5 reviews

10 Farad Pro Digital Hybrid Capacitor

• Digital 10 Farad Capacitor
• Bright Red LED Voltage Display
• Monitor System Voltage
• 12-16 Volt Operation / 18 Volt Surge
• Louder And Cleaner Bass Response

$159.95

IN STOCK

  • 3.3
4 reviews

10 Farad Capacitor with Digital Voltage Display and Blue Illumination

• 10 Farad Digital Hybrid Capacitor with Blue Illumination • 3-Digit, super bright LED voltage meter
• Voltage measure accurate to +/- 0.1VDC
• Blue illuminated window
• Warning tones for reverse polarity connection, over voltage (>17VCD), or low battery voltage (<10VDC)

$63.99

IN STOCK

Energy Storage Reinforcement Capacitor with LED Voltage-Display

• Hybrid 1.0 Farad Digital Stiffening Capacitor
• Increases quality of sound
• Platinum plated
• Solid brass top helps reduce stripping

$102.99

IN STOCK

  • 4.1
9 reviews

18 Farad Digital Hybrid Capacitor with Blue Illumination

• 18 Farad Digital Hybrid Capacitor with Blue Illumination
• 3-Digit, super bright LED voltage meter
• Voltage measure accurate to +/- 0.1VDC
• Blue illuminated window with light following played music
• Automatic sleep status when volume is low
• Warning tones protection

$79.95

IN STOCK

Energy Storage Reinforcement Capacitor

• 1.0 Farad Capacitor
• 16V to 20V peak
• Solid-brass top reduces stripping; platinum plated
• Increase the peak power of your amp
• Reduce dimming headlights

$72.99

IN STOCK

Only 2 Left!

Hybrid Digital Stiffening Capacitor and Distribution Block

• 10 farad Hybrid Digital Capacitor
• Increases quality of sound
• Increases level of bass
• Platinum plated

$223.99

IN STOCK

  • 3.3
4 reviews

2 Farad Capacitor with Digital Voltmeter Read-out

• For systems up to 2000 watts max
• Bright Red LED voltage display
• Rated Voltage: 20 VDC
• Surge Voltage: 24VDC
• Includes mounting hardware for a secure installation

$36.99

IN STOCK

  • 5.0
1 review

2 Farad Capacitor with Digital Display (Black Finish)

• 2 Farad Capacitor
• Red Digital Voltage Display
• Audible warning tone for reverse polarity, low battery voltage
• Rated voltage: 16 VDC

$29.99

IN STOCK

3.0 Farad Digital Capacitor (PCX3F)

• 3.0 Farad hybrid digital power capacitor
• Digital blue voltage display
• Tinted plexiglas with blue LED lights inside for viewing
• Electronics polarity circuit
• Over voltage protection circuit
• Platinum plated ring terminals

$48.99

IN STOCK

30.0 Farad Digital Hybrid Capacitor (PCX30F)

• 30.0 Farad hybrid digital power capacitor
• 24V DC foil-carbon internal capacitor
• Digital blue voltage display
• Electronics polarity circuit
• Over voltage protection circuit
• Platinum plated ring terminals

$100.99

IN STOCK

  • 5.0
1 review

1 Farad Capacitor and 4GA 2 Channel Amp Kit (Black)

• Complete 4 Gauge 2-Channel Amplifier Installation Kit
• Designed Specifically For Car Audio Systems Up to 1000 Watts RMS
• Premium Power and Ground Wire Provides Optimal Power Transfer
• 30% Copper CCA Wire

10% off a Belva Wiring Kit and Capacitor with Amp Purchase!

$57.99

IN STOCK

2 Farad Capacitor with Digital Display (Black Finish)

• 2 Farad Capacitor
• Red Digital Voltage Display
• Audible warning tone for reverse polarity, low battery voltage
• Rated voltage: 16 VDC

$27.99

IN STOCK

  • 4.6
7 reviews

4.0 Farad Digital Capacitor (Sound Stream SCX4)

4.0 Farad Digital Capacitor • 12-16 DC Input Voltage • Blue LED Viltage Display • Flashing LEDs • Bolt Post for Ring Terminal • Chrome plated chassis

$62.99

IN STOCK

Only 3 Left!

  • 4.9
9 reviews

5 Farad Pro Digital Hybrid Capacitor

• Digital 5 Farad Capacitor
• Bright Red LED Voltage Display
• Monitor System Voltage
• 12-16 Volt Operation / 18 Volt Surge
• Louder And Cleaner Bass Response

$105.99

IN STOCK

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Capacitors Information

Car Audio Capacitors:

A car audio capacitor is an electrical circuit element used to store charge temporarily. This should not be confused with a battery, as a cap only temporarily holds a charge. It generally consists of two metallic plates separated by a dielectric. It is also used as a crossover component to filter out lower frequencies and allow higher frequencies to pass.

Audio capacitors charge and discharge very fast, stabilizing the voltage to the amplifier. Stabilizing the voltage helps the amplifier stay cooler and run more efficiently because the amplifier is not straining to get the power it needs. Stabilizing the voltage helps an amplifier reduce distortion and produce more power consistently.

A farad is the measurement unit used to determine the size of a capacitor. One farad to 500 watts RMS is the ratio used to determine the size of capacitor needed to supply enough power to an amplifier. While using a cap much larger than recommended will not damage an audio system, it is not recommended because of the unnecessary strain it puts on the vehicles electrical system.

Which Capacitor Should I Get?

Installing a capacitor is a great way to help stabilize the voltage being sent to the amplifier. This can help reduce the strain on the vehicle?s electrical system, reduce dimming lights, and improve sound quality of the audio system. Since each car is different and unique, knowing which capacitor is best for your system is important to know. As a general rule of thumb, Sonic Electronix uses the following information as a guideline for selecting capacitors:

Capacitor Farad RatingTotal System Wattage
Under 1 Farad0-499 Watts
1-1.9 Farad500-999 Watts
2-2.9 Farad1000-1499 Watts
3-4.9 Farad1500-2499 Watts
5+ Farad2500-Up Watts

To find out more about car audio capacitors, call our friendly support team at 1-661-257-9993