Top 10 Best Capacitor For Car Audio in 2021

You may have the loudest car audio system in the world in your car, but without a high-quality car audio capacitor, you can damage your vehicle. Anything that works together can dim the lights, drain battery power, or impair the alternator. However, a premium car audio capacitor can reduce potential damaging impacts to your car while driving with the bass turned up high.

Acting as a second power source for your car, a car audio capacitor or booster capacitor is basically a smaller version of your car battery and stores energy for other electrical components, such as the lights or the amplifier. To make it a bit easier to find the best capacitor for car audio, we’ve listed some of the best in our guide below.

Top 10 Best Capacitor For Car Audio

Image Product Details   Price
91ekTXpU+3L._AC_SL1500_ Planet Audio PC10F. 3 Digit Bright Blue Digital LED Voltage Display, Blue Illuminated Window.
Audible Warning Tone for Reverse Polarity, Voltage Overload and Low Battery Voltage .
Check Price
41EsjwHcimL._AC_ Stinger SPC505 Pro Hybrid 5 Farad Capacitor 16V -18V surge, For systems up to 1000 Watts, 5 Farads, Louder & clearer bass response, Monitor system voltage.
Stabilizes battery voltage, Minimizes headlight dimming, Similar to a battery/capacitor combo.
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41BbjvzDsqL._AC_ Rockford RFC10HB 10 Low ESR (Equivalent Series Resistance), combination carbon capacitor/electrolytic capacitor, platinum plated, available in 2 farad and 10 farad Check Price
71VBmPcsZNL._AC_SL1500_ BOSS Audio CPBK2 3 Digit Bright Red Digital LED Voltage Display.
Audible Warning Tone for Reverse Polarity, Voltage Overload and Low Battery Voltage.2 Farads with digital voltage display.
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81JwJ4Z3tVL._AC_SL1500_ Pyle PLCAPE50 SUPPORTS CAR AUDIO SYSTEM: A high-demand audio setup can often place extra demand on your car’s electrical system. When you need power, especially for booming bass and soaring highs, this 5.0 farad Pyle capacitor will have it at the ready Check Price
Amazon.com Power Acoustik PC1.5F 1.5 Farad Digital Power Capacitor Car Electronics - Google Chrome Power Acoustik PC1.5F Keeps Voltage up so bass hits hard!
12-16 DC Volts Operation
Mounting Brackets
Easy Installation
Digital Display
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DS18 CAP50 Power Capacitor Audible Warning Tone for Reverse Polarity, Voltage Overload and Low Battery Voltage.2 Farads with digital voltage display Check Price
71OwVZgIaRL._AC_SL1500_ Sound Storm C22 Capacitance Tolerance: + / – 10%
Working Voltage Range: 16 VDC.Red digital voltage display
Surge: 20 V
Chrome Plated Posts
Mounting Brackets and Hardware Included
Dimensions: 10-5 / 16” (H) x 3
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613dubSRMJL._AC_SL1249_ Rockville RXC4D 4 Rockville RXC4D 4 Farad Capacitor
4 Farad/12 Volt Stiffening Capacitor with 24 Volt Surge Capacity
Lucite Encapsulated Display and Logic Circuitry.
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61b1P0zNVUL._AC_SL1001_ 4 Farad Power Capacitor,4 Farad Power Capacitor TRUE 1.0 FARAD CAPACITOR. A feature that has more electrical conductors than other competitors. This also allows to handle any stero system easily up to 1200 watts power output Check Price

1. Planet Audio PC10F

best capacitor for car audio

One car audio capacitor for sale that you might be interested in is this one from Planet Audio. It uses a 3 digital LED display. If it is somehow in reverse polarity, a power overload, or a low battery, there is a warning tone that will audibly indicate the problem.

Voltage measurements are astonishingly accurate to +/- 0.1 VDC, making it an excellent choice for your vehicle. With the voltage going hot at 16 VDC, there is also a 24 VDC surge reading. This model only weighs 5 pounds and has a one-year warranty if something breaks or malfunctions. Perfection can be achieved when building your sound system with this car capacitor because it will help stabilize your audio system to the best of its capabilities.

When working with this capacitor, there is an instruction manual to help you on your way. Charging this capacitor will only take 5-60 seconds of time. A voltmeter can also help measure whether or not your capacitor is completely full. But be careful after charging because the capacitor can get very hot when touched.

With this device, the Planet Audio capacitor uses 1 farad for every 1000 watts of power. When your vehicle is running, the capacitor will charge, and when the car is off, it will be turned off for maximum safety and professional use.

Pros
  • Three digit LED display
  • Audible warning tones
  • High capacitance
  • Low voltage and voltage overload protection
  • Blue illumination
Cons
  • It’s price is in the high range
  • Lacks an inbuilt distribution block
  • Requires a little bit more time to charge

2. Stinger SPC505 Pro Hybrid 5-Farad Capacitor

best capacitor for car audio

Another digital power capacitor that you can find on the market is the Stinger SPC505. It has a surge range of 16 to 18 volts. If you have an audio system that boosts up to 5 farads and 1000 watts of power, this capacitor might be what you were looking for.

Does your audio system have more than 1000 watts? So you have to look for a different capacitor at this point. Never max out a capacitor in your vehicle. It will damage the condenser, your vehicle, and even yourself.

This capacitor stabilizes the voltage of a battery. Also, it will eliminate headlight dimming entirely. You can think of it as a capacitor/battery tandem. There is a red LED display to help you navigate through the options for this capacitor. The Stinger capacitor uses 4ga or 1 / 0ga inputs for its operation. This allows for a sleek-looking condenser that gives the bass a cleaner response time and a louder overall sound.

By installing this capacitor you can easily mount it in the same way as you would an amplifier. This way, it won’t move around your car while driving. In addition, it will work day by day according to your expectations.

Pros
  • Very low ESR
  • Terminals with satin finishing
  • Alerts for reserve polarity
  • Very affordable
  • Fast charging
Cons
  • May not power systems exceeding 2000 watts
  • Lacks audible low voltage and overload alerts
  • Lacks surge protection

3. Rockford RFC10HB 10-Farad Hybrid Digital Capacitor

best capacitor for car audio

If you look at any audio capacitor reviews, you will probably see the Rockford brand shaking the pages. The Rockford RFC10HB uses an equivalent series resistance (ESR) when working with its capacitor. Is that how it works. Rockford uses Low ESR which is combined with a platinum plated carbon and electrolytic capacitor, which achieves fantastic results. This 10 farad model uses digital technology that gives it sensational marks.

Many users of this capacitor have paired this capacitor with a car battery, allowing the audio system to run at over 2000 watts. When working to charge the Rockford capacitor, you can have it professionally installed or you can do it yourself. If professionally installed, mechanics will charge it in advance.

On the other hand, if you do the work yourself, you can use the load resistor for a 20-30 second load. Once done, be sure to let it cool. Additionally, you can ground the device, if desired, for additional vehicle protection. There is a test light on the resistor to help make sure your capacitor is grounded or not.

Every Rockford capacitor installation uses 0 gauge wiring. This way the current will run smoothly with your car’s battery and capacitor. Then you can rock out to the tunes of your choice.

Pros
  • Low internal resistance
  • Platinum-plated
  • Fast charging
  • Solid brass top
  • High voltage peak
Cons
  • Available on the higher price bracket
  • Doesn’t feature LED voltage display
  • Lacks audible alerts

4. BOSS Audio CPBK2 – 2-Farad Car Capacitor For Energy Storage

best capacitor for car audio

If you want your vehicle to perform like a boss, then the Boss Audio CPBK2 should be on your radar. As one of the best capacitors money can buy, this device is turning heads from left to right. Although this is the 2 Farads variety, Boss has many options ranging from a 2 Farads to 18 Farads model.

This device uses a 3-digit LED display with an audible tone for any warnings you need to heed. A one-year warranty will offer you peace of mind when using this product. If it breaks down because of the manufacturer or yourself, you can get a free replacement for the first year.

When installing this device, make sure the remote output is connected to the capacitor. If it is not fully connected, then your capacitor will not work or it will minimally affect your vehicle’s dimming issues.

Since this device weighs less than 4 pounds, you won’t have to worry about any difficulties in installing this device. You can mount it like an amp or slide it under a car seat. After purchasing the BOSS capacitor, you’ll receive a 1 watt / 51-ohm resistor and mounting hardware to boot. There is a possibility that you need to buy some wiring kits. Consult the condenser instruction manual and/or your vehicle’s owner’s manual.

Pros
  • Compact in dimensions
  • Lightweight
  • It’s less expensive
  • Charges pretty quickly
  • Low voltage and overload protection
Cons
  • Stores less energy
  • May not power more powerful amplifiers
  • Does not feature an in-built distribution block

5. Pyle PLCAPE50

best capacitor for car audio

Is your high demand car audio system putting too much pressure on your car’s electrical system? You need a large capacitor to supply the extra power needed to keep the bass booming and the treble high. Pyle PLCAPE50 is a 5 farad limit that offers such a solution.

Having an audio system that can deliver powerful sound without interruptions is very satisfying. The PLCAPE50 can make this happen as it can handle the power demands of the system. It has a surge range of 20 to 24 volts.

This cap comes with electronic polarity and surge protection. So you can rely on it for sustained high-quality audio performance. Additionally, these protection features help reduce electrical problems that could be costly to solve, meaning significant savings in car maintenance costs.

This Pyle condenser is among the easiest to install. First, the cap’s size is neither too small nor too large to cause problems during installation. Second, the clear Lucite brackets and accompanying mounting hardware make it easy to handle the lid.

When purchasing a capacitor for your car audio system, an attractive appearance is a bonus.
The PLCAPE50 has a striking finish thanks to its chrome post kits and aluminum housing. This is in addition to the blue digital voltage display showing the amount of power available.

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Pros
  • Easy-to-read LED display screen
  • Greatly improves the bass experience
  • It keeps the battery voltage stable and saves the alternator
  • Cool blue lights come on when the cap supplies power
  • Perfect choice of capacitor for SUVs and trucks
Cons
  • Fragile terminals that can break easily if the installer is not careful
  • Some users find the LED lights annoyingly bright

6. Power Acoustik PC1.5F

best capacitor for car audio

Rated up to 24 VDC, this 1.5 farad digital power capacitor from Power Acoustik ensures that your amplifier stays strong enough. Stabilizes the voltage supply to your audio system, helping the system perform at its best. It is one of the best options for car audio systems with a power capacity of around 1000W.

The PC1.5F includes up to 24 volts DC to keep your amp on even when the battery runs low. Any system with a power handling capacity of approximately 1000w will work perfectly with this cap. This cap allows you to know any electrical problems that may affect the delivery of your audio system in real-time. You don’t have to guess what is affecting your audio experience. Each issue is reported with a flashing light.

You can clearly see through the red illuminated display what the capacitor can do for your audio system. In addition, this red screen makes the interior of the car aesthetically attractive. Most of this cap users have expressed their enthusiasm for the red screen, so you probably like it too.

Weighing in at just 3 pounds, this capacitor is incredibly easy to handle. You can move it from one vehicle to another without problems. Also, the cap can fit well under any chosen car seat, which is a good and safe location for such an essential device.

Pros
  • It accepts any wire gauge as long as it has ring terminals
  • Prevents sound clipping when audio system is playing at peak levels
  • Increases amplifier efficiency
  • Mounting brackets for quick installation
  • It doesn’t drain your battery
  • Automatic shutoff protection
Cons
  • Posts tend to strip easily when tightened during setup
  • The cap shuts off slowly; can take up to 10 minutes

7. DS18 CAP50 Power Capacitor

best capacitor for car audio

If you’re trying to find extreme digital power, the DS18 could also be the model for you. There always seems to be a debate between what is best to fuel the sound. It’s like there’s a head-to-head battle between a car audio capacitor and a battery. However, there is no competition. One capacitor wins every time.


With the DS18, it’s the simplest capacitor for car audio systems due to a couple of things. Let’s start with the screen. An alarm is triggered if your voltage drops below 10 volts or above 17.5 volts. Also, if reverse polarity starts to affect your system, you will also be warned about this to protect your polarity circuits.


Measuring with 50 Farads of power, you will have tons and tons of digital power to demand. Your voltage will stay stable enough that your music will vibrate and your car lights won’t dim at all.


Are you trying to find better performance from your vehicle? The DS18 can fix that. It can reduce any audio distortion as well as eliminate any voltage drop. Thanks to innovations like this, DS18 continues to distinguish itself from other brands thanks to its creativity and technological advancements.

Pros
  • Power ranges from 1,000 to 1,600 watts
  • Has great mobility wherever you need it
  • Professional design and construction
  • Great for Jeep models
  • Runs cooler than other hybrid models
Cons
  • No audible alerts
  • May not power more powerful amps
  • No in-built distribution block

8. Sound Storm C22

best capacitor for car audio

The Sound Storm C22 condenser is another great car stereo condenser. Its key unique feature is its chrome studs. Chrome plating gives the posts a decorative surface finish. It also improves the strength of posts.

Also, the chrome plating makes the posts stronger and more durable.

Surge protection: a high working voltage of 16V DC and a surge of up to 20V DC. Its high working voltage means that it can work efficiently at a higher voltage, and its 20V DC surge voltage means that it is protected against high voltage.

Fast charge: the capacitor has a capacitance value of 2 Farads. The lower capacitance value makes charging fast, so it will power your car stereo amplifier in no time.

Features a red voltage display that shows the current-voltage in three digits. The red voltage display allows the user to check the capacitor voltage without using special voltage measurement tools.

The Sound Storm C22 features chrome posts. Chrome posts have greater strength and durability, as well as a decorative finish.

Mounting brackets and other mounting supplies are included. So you won’t have to spend extra money on mounting supplies.

Pros
  • Budget friendly
  • Compact design
  • Surge protection
  • Gets a full charge quickly
  • Chrome plated posts
Cons
  • A little bit huge
  • Stores little charge
  • Not ideal for powering more powerful amplifiers

9. Rockville RXC4D 4-Farad Digital Car Capacitor

best capacitor for car audio

The last best audio capacitor money can buy is the Rockville 4 Farad Power Cap. It uses 12-volt boost technology that allows for a 24-volt surge. An encapsulated screen protects your condenser from any danger.

On the screen itself, you will notice red and blue LED lights. The red LEDs are for the voltage display, while the blue LEDs are for the measurement system. The two colors contrast really well, so you can focus on the information that it shares with you.

Another cool thing that comes standard on a Rockville is a negative polarity feature. This is a control IC circuit that protects against any negative polarity, alerting you immediately when this is happening.

When you purchase this capacitor, know that you will receive instructions for the resistor, mounting brackets, and hardware for any needs you may have with this project.

Statistics show that a car’s factory audio system only produces 70% of what it could actually make. Think about what this Rockville capacitor could do for you to enhance your need for lighting and sound inside your vehicle. With a continuous flow of energy from your capacitor, you will be able to accomplish this and much, much more.

Pros
  • LED display screen
  • Multiple farads
  • Mounting brackets included
Cons
  • Flashing light can be distracting
  • May not be able to handle more powerful amps

10. Belva Professional Grade 1 Farad Capacitor

Belva’s one-farad power capacitor is small but powerful. One of the best parts is that you get a complete kit for the price. It is compatible with four-gauge two-channel amplifiers and is capable of handling sound systems up to 1,000 watts RMS. It is housed within a reliable and strong aluminum casing, so it is protected and works perfectly.

The most surprising thing may be its weight. Although it’s compact, it actually weighs seven pounds, making it one of the heaviest beanies on our list. This doesn’t take away from its functionality, but it does add a bit of weight to your car. It has an LED display screen, but it is smaller.

Pros
  • Compact and powerful
  • LED display
Cons
  • Heavy
  • Small screen

Best Capacitor For Car Audio Buying Guide & FAQs

If you have a robust car stereo system with large speakers and a booming subwoofer, you may need a car audio capacitor. High-voltage amplifiers draw a lot of energy from your vehicle’s electrical system. When you hit a deep bass note, the system may not be able to supply a high current fast enough to other components in your car. This is what leads to dimming the lights or reducing the power of the car battery.

Capacitors use farads to determine the amount of energy they contain. For example, if your amplifier contains 1,000 watts of power, it is recommended to get a capacitor with one farad to drive the amplifier.

Benefits of a Car Audio Capacitor

There are several reasons to purchase a car audio capacitor for your car, truck, SUV, or Jeep. An impressive audio system is excellent, but your vehicle loses power when you draw power from other components. A loss of power can drain your car battery, reduce fuel consumption, and damage other electrical parts in your car.

But a condenser can prevent your lights from flickering, increase visibility, and improve your vehicle’s performance.

The best car audio capacitor will help you in a number of ways. While the battery can focus on turning on the lights and other components, the capacitor will enhance your audio system. Since the battery doesn’t have to power your speakers or amplifier, you can send power to everything you need without hassle while the capacitor concentrates on powering your audio system. Having fully operational lights will allow you to focus more on the road.

A car audio condenser will help avoid unwanted distractions on the road by making sure the car headlights stay on when rocking with strong bass.
A capacitor will help ensure that the battery doesn’t drain, so everything else in your car runs smoothly.

With a capacitor powering your amp and speakers, the battery can power other components.
A car capacitor will allow your battery to keep the lights on inside your car.

How to Install a Car Audio Capacitor in your Vehicle

Things to Consider Before Buying the Best Capacitor For Car Audio

Capacitors for car audio systems are not designed the same way. Different capacitors have different characteristics.

They have different pros and an equal share of cons. Therefore, a capacitor that works for one car audio system may not work effectively on another car audio system.

Therefore, you will want to choose the best capacitor for your car to get the most out of it. But how would you choose the best capacitor for your car audio? Well, there are a few considerations to think about before making your final decision.

Here are the things to consider before buying the best capacitor for your car audio:

Capacitance value rating

The rating of the capacitance value of a capacitor describes the charge that a capacitor can store. The capacitance value is represented in Farads. The higher the capacitance value, the more influential the capacitor.

Before buying a capacitor for your car audio, consider the power of your car amplifier. If your car amplifier is rated less than 2000 watts, a capacitor with a capacitance value of 1 to 2 Farads may suffice.

However, if you have a more powerful car amplifier, consider a capacitor with a higher capacitance rating for the best performance.

Rated voltage and capacitor overvoltage

Different capacitors have different nominal voltages. In general, most automotive batteries and alternators produce a voltage of 12 to 14.8 VDC.

So you’ll want to consider a capacitor that can handle a nominal voltage of up to 16VDC. The surge must be on the higher side.

A nominal surge of around 20VDC should be sufficient to ensure that your capacitor is not damaged in the event of a sudden downpour.

Protection against voltage overload and under-voltage

Each and every capacitor has a maximum voltage level it can take. Exceeding the maximum voltage can damage the capacitor.

Also, the low voltage can damage the capacitor. So consider a capacitor with Undervoltage and overload protection to increase the chances of using it for more years.

If you can get a capacitor with an automatic shutdown, all the better.

Ease of loading and installation

Another factor to consider is how easy it is to charge the capacitor. You don’t want to invest in a capacitor that takes too long to charge or is complicated to charge.

Also, consider how easy it is to connect the capacitor to your car’s audio system. It should be easy to connect or disconnect.

Also, it should come with mounting hardware, including mounting brackets and screws.

Audible alerts for unfavorable conditions

While driving, you may not always check your capacitor’s charge level to drive safely.

Therefore, you should invest in a capacitor that can give you audible alerts in the event of unfavorable conditions like undervoltage and overvoltage. Also, consider a capacitor with reverse polarity alerts.

Voltage LED display

It is ideal to invest in a capacitor with a voltage LED display to easily know the capacitor’s current charge level.

An LED voltage display eliminates the need for voltmeters, which only makes it more difficult to use a capacitor in your car audio.

Condenser durability

Whenever you invest in any product, you always want something that can serve you for years to come. The same case applies to the purchase of capacitors. It is ideal to consider the material and finish of the condenser.

Choose a condenser made of a material and finish that can resist corrosion and the elements. The end caps must also be made of a strong material that resists abrasion.

Price-quality ratio

Well, obviously, your budget determines the type of capacitor you can afford. Some capacitors cost more due to additional features, while others are more affordable due to limited capacities.

At the same time, it doesn’t mean that affordable capacitors don’t have great features.

However, you don’t want to buy a capacitor just because it’s cheap. You must also consider its quality.

Therefore, you must consider balancing price and quality. Always avoid compromising capacitor quality for cost. Consider a capacitor with the features you need and within your budget; otherwise, stretch your budget a bit.

Final verdict

In conclusion, the final decision you will make when buying the best capacitor for your car audio should primarily depend on quality, features, and budget.

Avoid choosing a capacitor for your car audio just because it looks attractive or is exceptionally affordable. Choose a capacitor that has all the features you want and fits your budget.

Although the capacitors mentioned in this guide have their similarities and differences, including different pros and cons, they do have their own unique characteristics.

Each of these capacitors has an outstanding characteristic that distinguishes it from the other capacitors.

As long as you choose a capacitor that is powerful enough to power your car’s audio amplifier, you’re good to go. You can be sure that your car’s headlights and dash lights will never dim every time you play bass notes in your car’s audio system.

So with these tips and guidelines in mind, you have a better chance of investing in the best car audio capacitor.

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