Car amplifiers are one of the most important components of any vehicle, enhancing the power output of the vehicle’s speakers. The easiest way to get the most out of your car’s audio system is to get a quality amplifier. When it comes to amps, you have a lot of choices, but not many are good. On today’s market, there are dozens of brands, yet very few can be counted among the best. Here are the top 10 best 4 channel car amplifiers.

What is a 4-channel car amplifier?

A 4-channel car amplifier is a device with 2 more channels that amplifies audio signals from a source device such as a stereo or a tape deck.

The 4 channel car amplifier is a type of car amplifier which has been designed with the intention of providing the optimum sound solution for a car.

In this type of amplifier, four channels have been used in order to allow the use of four separate speakers. The 4 channel car amplifier is a popularly used type of car amplifier because of its versatility.

What is the Best 4 Channel Car Amplifier?

The amplifier is a very effective device that can change the sound of your favorite music. If you want your music to sound as good as possible, you need to choose a proper amplifier. This device has many different qualities that can fit many different needs.

If you want to enjoy the best sound, you need to choose a quality amplifier with the best quality. If you want to connect your amplifier to your car stereo, you need to be sure that the car is made for 4-channel car amplifiers. By checking the size of the amplifier, you can find the right size and enjoy the best sound. There are the 10 best 4 channel car amplifiers to purchase:

1. Planet Audio AC2400.4 4 Channel Car Amplifier

The Planet Audio AC2400.4 4-channel amplifier is a true powerhouse and one of the best-rated 4-channel car amplifiers on the market. With its 4-channel capability, you’ll be able to hit the road with the kind of thump that makes everyone look twice.

The amp is all about functionality and ease of use. Let’s start with the controls. This is an advanced feature that allows you to adjust the volume of each channel so that the sound coming out of the speakers is balanced. If you are using front and rear speakers, you can adjust the volume independently. If you are using all four channels, the volume will be balanced.

Amplifier Features:

  • 4-Channel
  • Class A/B Full Range Amplifier
  • 2400 Watts
  • MOSFET power supply
  • Bridgeable
  • 2-4 Ohm Stable
  • Subwoofer Control

2. BOSS Audio Systems R1004 4 Channel Car Amplifier

The R1004’s clean MOSFET power supply provides ample current. The R1004 also comes with high-pass and low-pass filters, to ensure great sound quality no matter what kind of speakers you’re using. It also comes with speaker-level inputs, so even if your receiver doesn’t have RCA outputs, you can still connect your amp.

BOSS Audio Systems R1004 amps deliver an impressive muscle car-crushing 400 Watts of maximum power per channel at 2-Ohms. And their wide range of features and functions ensures that you can achieve the perfect sound in almost any type of vehicle.

Power your vehicle’s sound system with the BOSS Audio Systems R1004 Class A/B amplifier. Its rugged construction features a rugged steel case, durable aluminum heat sink, and oversized power terminals, making it ready to take on the terrains of any car or truck. This 4-channel car amplifier is loaded with high-performance circuitry to produce great sound with less distortion. Its four-channel operation lets you power four speakers, plus a subwoofer.

Amplifier Features:

  • Class A/B
  • 4-Channel
  • MOSFET Power Supply
  • 2-Ohm stable
  • 400 Watts
  • High and Low two levels inputs
  • LED Indicator
  • Switchable Input

3. Blaupunkt 1500W 4-Channel, Full-Range Amplifier

Blaupunkt manufactures car audio products with the highest standards using components that are sourced from leading suppliers in the market. The Blaupunkt 4-Channel Full-Range Amplifier is engineered with one aim in mind, to deliver high-quality sound while providing maximum bang for your buck.

The Blaupunkt 1500 4-Channel Full-Range Amplifier with an RMS power output of 150 watts is a four-channel amplifier. This amplifier is suitable for powering each channel of a speaker system with a minimum of watts.

This amplifier is easy to install and simple to operate. The class AB amplifier has a frequency response of 10Hz – 45Hz and has a power output of 150 watts per channel.

Amplifier Features:

  • Class AB
  • 4-Channel
  • 150-watt RMS output
  • 1500W Maximum Power Output
  • 2 Ohms stability
  • =>90dB Signal-To-Noise Ratio
  • 11-15V DC Voltage
  • Slim fits amplifier

4. Crunch PX1000.4 Power Amplifier

The new Crunch PX1000.4 is a 4-channel car amplifier that will bring your entertainment experience to life. This new addition to the Crunch line is the ultimate choice for powering your favorite subwoofer or multi-subwoofer systems.

It’s one of the best car amplifiers you’ll need for your vehicle. From its compact design to its powerful Class AB amp. The PX1000.4 delivers the punch and reliability you need to get any job done.

The Crunch PX1000.4 is perfect for any stereo system that requires incredible power at high-quality sound levels. With the Crunch PX1000.4, you can enjoy low-frequency bass that reaches down with incredible accuracy. The Crunch PX1000.4 amplifier delivers 1,000 watts at 2 Ohms.

Amplifier Features:

  • Class AB
  • 4 Channels
  • 1,000 Watts
  • Low RCA inputs and outputs level
  • 2 Ohms per channel

5. Rockville dB45 3200 Watt/800w RMS 4 Channel Amplifier

Rockville RMB45 3200-Watt Mono 4-channel car amplifier with 4 channel preamp outputs. Rockville dB45 Amplifier is the perfect solution for powering your complete speaker system. You can power up to 4-speakers with this amp.

This amp has 4 sets of high-level inputs, high-level output, power indicator light, fuse holder, built-in cooling fan, and preamp and speaker level inputs. This amp is compact and lightweight, and it has a nice design and a black finish.

The dB45 4 channel amplifier is perfect for powering your entire sound system. This amplifier features a patented Class AB technology that delivers music at greater than 95% efficiency and will not break down like traditional amps. It has a variable low pass filter and a variable bass boost which allows you to customize your bass and treble levels. With a 4-channel input, you can connect this to your head unit and run all your speakers off of it.

Amplifier Features:

  • 3200-Watt maximum power
  • 2 Ohms 800 Watts per channel
  • 4 Channel Car Amplifier
  • MOSFET Power Supply
  • Voltage Protection at 10V-16V
  • Class AB Technology
  • Fully Adjustable Crossover
  • Low Pass and High Pass Filter: 50Hz-3KHz and 15Hz-1KHz
  • LED Indicator

6. Rockford Fosgate PBR300X4 Punch 300-Watt 4 Channel Boosted Rail Amplifier

The Rockford Fosgate PBR300X4 300-Watt 4-channel Class BR amplifier delivers enough power to run a full-range car audio system in a compact car. This audiophile-quality amp is tuned for maximum impact, delivering more power than you’ll ever need. Plus, it’s loaded with networking, equalization, and crossover controls for standalone bass management.

A four-channel car amplifier can give you 300 watts of total power. It is an efficient amplifier, so you do not have to worry about it draining your battery. The amplifier has a small footprint so it will not take up a lot of space in your engine bay. You can install it in a location that is easily accessible. The amplifier has a user-friendly interface that makes it easy to control.

It’s easy to set up, thanks to Auto Turn-On, speaker-level inputs, and a low-voltage protection circuit that automatically turns the amp off if your car’s electrical system is unreliable.

Amplifier Features:

  • 75 Watts RMS Power per channel
  • 300 Watts of power
  • Class BR Technology
  • MOSFET output stage
  • Boosted Rail technology
  • 4 to 2 channel input switches
  • Butterworth crossover
  • High inputs level
  • Compact chassis

7. JBL GX-A604 4-Channel Full Range Amplifier

The JBL GX-A604 4-Channel Full Range Amplifier comes with several audio input source options and a total of four channels. The JBL GX-A604 amplifier provides up to 60 watts RMS per channel at 4 ohms.

It is a high-performance 4-channel amplifier designed to power your car audio system. This amp offers 85 watts of Max power at 2 Ohms per channel. And 435 watts of Max power output in total.

JBL GX-A604 delivers a powerful 600W peak output and 600W RMS output. It has a variable low-pass electronic crossover. The switchable bass boost has an adjustable level.

Amplifier Features:

  • 4-Channel
  • Maximum power output: 435 watts
  • Heat sink: Cast-aluminum
  • Electronic crossover
  • Variable Bass EQ
  • Changeable bass boost

8. Pioneer GM-A6704 4-Channel Bridgeable Amplifier

The Pioneer GM-A6704 4-Channel Bridgeable Amplifier provides high-quality sound, drawing on the reputation of the company’s legendary car audio. It includes a powerful 1000-watt maximum power capacity, optimized for the latest generation of midsize to large vehicles.

Amplifier Features:

  • 4-Channel
  • Bridgeable Amplifier
  • High pass filter
  • Max Power at 2 Ohms: 250 Watts x 4
  • Max Power: 1,000 Watts x 2
  • MOSFET Power Supply.
  • Bass Boost is Adjustable

9. Kenwood 1177524 Compact Automotive Amplifier

The Kenwood Kac-M1824BT is a high-performance, 4 channel Class D amplifier that has a power output of 45 x 4 watts at 4 Ohms. Large precision-machined heat sinks help keep the amp running cool, even under the toughest conditions.

Amplifier Features:

  • Compact Automotive Amplifier
  • Class D Kac-M1824BT
  • 4-Channel
  • 400 watts peak power
  • Max power at 4 ohms: 45 watts x 4
  • IPX5 Remote Control
  • Built-in Bluetooth
  • Multi-Application

10. Hifonics ZRX1016.4 Zeus Car Audio Amplifier

This 4-channel amplifier is a great solution for those who want to upgrade their sound systems at the best price possible. The Hifonics ZRX1016.4 amplifiers are designed to provide power and quality. It works with most speakers and is a must for those who listen and enjoy music on a daily basis.

Class AB amps utilize digital switching technology to amplify audio signals. And as such require fewer components and reduces power loss during transfer. This Hifonics Zeus ZRX Series 4-channel amplifier is capable of delivering up to 500 watts RMS at 2 ohms.

Amplifier Features:

  • 4-Channel
  • Class AB
  • Maximum power 1000 watts
  • Max power at 4 Ohms: 250 watts x 4

Buyers Guide: How to Choose a Best 4-Channel Car Amp?

Car audio amplifiers are a good addition to any car’s audio system. Since, amplifiers are attached to speakers, which are mounted in your car, amplifiers can give you great sound. The best way to find out which option is best for the sound of your car is to have a listen to them. You can choose which options you want to have, but you must pick the one that gives you the best sound quality.

If you’re looking to take your car audio experience to the next level, there are a few things to consider. Size, power, features are all important to consider but are often secondary to one of the most important factors of all—sound quality.

There are a few things to consider when buying a 4-channel car Amp:

RMS Power Rating:

RMS stands for Root Mean Square. RMS is basically a way of measuring electrical power and how it is distributed and delivered to the load. The key to understanding RMS is knowing that the electrical power itself is distributed in a periodic manner. It is distributed as a squared root of the peak power.

Sound Quality:

It’s important to consider sound quality when choosing a 4 channel car amp. The amp you choose should deliver crisp, clear sound, with full bass. When you want to add a subwoofer to your car audio system, the first thing you’ll need is an amplifier. A four-channel car amplifier can help you get more sound out of your music.


Checking compatibility is important since it lets you know if your device can support or be supported by the product. Absolutely, a check to see if your car amp is compatible with your car’s stereo system is a must before buying a 4-channel amp.


To ensure maximum power output, it is necessary to match your amplifier’s voltage load to the speaker’s impedance rating. It is important to match the amp’s load because the speaker’s impedance rating determines the amount of power that can be delivered to the speaker.

An amplifier that can deliver more power than the speaker can handle can cause damage to the speaker’s voice coil.


It’s important to check the size of a car amp to make sure it’s the right size for the number of channels in your setup. It is important to check amplifier size to ensure that the amplifier is compatible with the speakers and the car.


Is this amplifier installation process easy or complex? Check it before purchase. It is recommended that the installation of the 4-channel car amp is checked by a professional to rule out any issues that can cause damage to the car or the stereo.

If the installation in your car is not properly done, your car amplifier can overheat or cause your car’s electrical system to become very unstable.


Is it bridgeable or not? Check the bridging process. Bridging to the amp is the connection of the signal to the amplifier unit. This ensures that the electronic devices are connected to the speakers.


It is important to check your crossovers by 4 channel car amp to ensure the proper flow of signals. If you do not, you may end up damaging your speakers and other equipment.

A crossover is a filter that separates the frequencies of the sound. It allows you to decide what frequencies will be sent to what channels. Importantly, a crossover is a necessity for a Multi-Channel Amplifier.

A/B Class and D class:

You should check both A/B class and D class to buy a 4-channel car Amp. It’s important to check AB/C/D class before buying a car amp because the C class car amp is lower cost than AB class, but its performance is very poor. Class AB, BR, and D amplifiers are preferable for car sound systems.

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Frequently Asked Questions of Best 4-Channel Car Amp

Which car amplifier is best?

A mono amplifier is usually the best option when selecting a car amplifier. A mono amplifier will power a subwoofer, a pair of speakers, or a combination of the two.
The best 4 channel car amplifier with the most power is the Crunch PX1000.4 that can provide 1000 watts of peak power. It has a feature that allows you to adjust the gain according to the volume of your music in order to make sure that your speakers are always at their peak performance.

Should I get a 4-channel amp?

Yes, you should get a 4-channel amp. 4 channel car amplifiers are great if you love to listen to music. Four-channel amplifiers are suitable when you have multiple speakers in your car. Since the 4-channel amplifiers have built-in crossover circuits to split or divide the original signal into different ranges of frequencies, they are the ideal source of power when you have multiple speakers in multiple frequency ranges in your car.

How many watts amplifiers do I need?

You can estimate your vehicle’s recommended amplifier power by using the conversion chart. The power rating of an amplifier is often expressed in watts. It measures the amount of power the amplifier is capable of producing.
The power of an amplifier depends on the sound needs of the person who uses it. For small systems, the amplifier power is around 360 watts. For large systems, the power can go up to over 3200 watts.

Can I connect 8 speakers to a 4 channel amp?

Yes, 8 speakers can be connected to a 4 channel amplifier. However, this depends on the power of the amplifier. The more power an amplifier has, the more speakers it can power.

How much power do I need?

A four-channel amplifier can drive four low-impedance speakers. Each will require about 50 watts, or 200 watts total. When buying an amp you will need to know how much power it will be handling.

Do I need a class D amp?

Yes, if you want to use 4 separate speakers for your audio system. A class D amp can push four channels and has a long lifespan and they do not get as hot as class AB amps.

What’s the difference between two-channel and four-channel amps?

These are 2 varieties of car amplifiers. A four-channel car amplifier has an output for four speakers, while a two-channel car amplifier has two channels. The two channels often contain a subwoofer, or low-frequency speaker, which is designated as the first channel. The second channel is for mid-range speakers.

We can say, Two-channel amps have two sets of RCA inputs and two sets of RCA outputs: one for the front and one for the rear. Four-channel amps have two sets of RCA inputs, two sets of RCA outputs, and an additional pair of RCA inputs and outputs for the subwoofer.

Why should I choose a four-channel amp?

Four-channel amplifiers are a popular option for car audio enthusiasts. This allows different channels to be used for different speakers. Since a 4-channel amp can power four speakers simultaneously, you will not have to buy a new amp every time you add a speaker to your car.

What kind of installation options do I have?

You have several options when installing your 4 channel car amplifier, including under-dashboard, or in-dashboard installation. Or, you can mount the amplifier under the seat, in the glove compartment, behind the back seat, in the trunk, in the engine compartment, under the hood, under the dash. Wherever you feel better.

What are the differences between AB amps and D amps?

One of the main differences between AB amps and D amps is the value of the power supply. D amps are smaller amplifiers that are commonly used in all car audio systems. AB amps are larger amplifiers that are commonly used in home theaters and stereos.

How many speakers can I run with a four-channel amp?

Usually, you can run four speakers with a four-channel amp. But, you can also connect 8 or 6 speakers to a four-channel car amplifier in series or parallel.

Can I bridge my four-channel amp?

You can easily bridge the channels to produce more power. If you want to bridge your four-channel amp, you can take it to a professional. The benefit of bridged amplifiers is that they take the power available and double it up, rather than having two separate amplifiers.

What does bridgeable mean on an amplifier?

Bridgeable means that the final two channels are bridged for connection to another amplifier. This would be the most cost-effective way to power a subwoofer. A bridgeable amp is an amp that can be used in bridge mode, parallel mode, or series mode.

How many channels do I need on a car amplifier?

You will need at least two channels to drive a subwoofer on a low-level signal, but you will need at least four channels to handle the full-range signal and the power needed to drive a subwoofer.

Most car amplifiers come with 4 channels, but some have 2 or more. It all depends on how many speakers you have in your car or truck.

What is the signal-to-noise (SNR) ratio?

Signal to noise (SNR) is the ratio of the desired signal power to the noise power. SNR is the amount of power needed to achieve the highest quality signal. The higher the SNR is, the better the signal quality and the less noise will exist. The SNR refers to the ratio of the strength of the desired signal over the strength of the noise signal.

In conclusion, the Rockville dB45 is one of the best 4 channel car amplifiers you can buy. It’s got the kind of power that will fill up the cabin with rich, full sound. If you’re an audiophile on a budget who needs a lot of power and wants some control over the sound, then this amplifier is a great deal. If you’re not, then this amp will be above and beyond what you need. We can safely say that the best 4 channel car amplifier for you depends on your personal preferences and budget. We hope this article helped you make an informed choice and find the right product for you.