Best 4 channel car amplifiers { July 2023 }

Extending your listening journey, an amplifier proves to be a game changer, providing enough power to drown out road and engine noise. Whether your car audio system consists of multiple speakers or powerful subwoofers, a multi-channel amplifier stands out as an ideal investment.

In this article, we take a comprehensive look at the top 4-channel amplifiers for 2023, which ensure an immersive and unparalleled audio experience during your drives.

best 4 channel car amplifiers { Quick overview }

Here is the updated and well researched list of top best 4 channel car amplifiers in 2023.

1: Kenwood KAC-M3004 – Best Overall

2: Taramps TS400X4 – High-Performance

3: Skar Audio RP-75.4AB – Precision Engineering

4: JBL GX-A604 – Legendary Sound

5: Rockville RVF-2 – Unrivaled Power

6: BLAUPUNKT 1600W – Immersive Audio

7: Rockford Fosgate R2-500X4 – Premium Amplification

8: Pioneer GM-A6704 – Cutting-Edge Technology

9: Alpine S-A32F – Superior Clarity

10: Planet Audio AC1200 – Thundering Bass

Best 4 channel car amplifiers { In-depth analysis }

After researching and investing a significant amount of time, here are detailed descriptions of the best 4 channel car amplifiers in 2023.

1: Kenwood KAC-M3004 – Best 4 channel car amplifiers for sound quality

Kenwood KAC-M3004

The KAC-M3004 amplifier is designed to deliver an impressive audio performance, ensuring that every frequency in your music is well-represented.

With a frequency response range of 20 Hz to 20 kHz, the KAC-M3004 covers the entire audible spectrum, which means that you can enjoy a clear and accurate sound with no missing notes or frequencies.

Thanks to its impressive power output of 50 watts per channel, the Kenwood KAC-M3004 amplifier is an excellent choice for anyone looking to boost the volume of their speakers.

With this amplifier, you can expect to get consistently loud and clear sound, making it perfect for speakers with low sensitivity that might otherwise struggle to produce high volumes.

It has the ability to bridge into 2-channels, making it a versatile option for powering your sound system. This feature enables you to connect a pair of subs and enjoy enhanced bass performance with a maximum output of 150 watts per channel.

The protective polymeric film shields the amplifier from dust, dirt, and even water, ensuring that it remains in top condition even in harsh environments. You can enjoy your music without worrying about damage caused by dust or water.

The Kenwood KAC-M3004 amplifier gives you greater control over your audio with its adjustable cut-off frequency. You can fine-tune your sound by choosing to cut off frequencies above or below a particular mark, anywhere between 50-200 Hz.

If you’re using speakers without a subwoofer, you can eliminate distortion caused by sub-bass beats by setting the high-pass filter to around 60 Hz, resulting in a cleaner and more enjoyable listening experience.

The KAC-M3004’s slim and trim design, with dimensions of 7 inches in width, 3 inches in depth, and a mere inch in height, allows for effortless and hassle-free installation, no matter how tight the space.

Reason to buy
  • Impressive audio performance
  • Wide frequency response range
  • High power output
  • Bridgeable into 2 channels
  • Protective film shield
Reason to avoid
  • Compact but powerful

2: Taramps TS400X4 – Best 4 channel car amplifiers for mids and highs


The TS 400X4 amplifier is an impressive piece of equipment that boasts a maximum power output of 100 W per channel, which is more than enough for most people’s needs.

However, in order to achieve this level of performance on a regular basis, it is necessary to set the impedance (resistance) at 2 ohms instead of the more common 4 ohms.

By switching the TS 400X4 to 2-channel bridged mode, you can get a massive 200 watts of power output per channel.

However, be cautious and check your subwoofers’ power-handling capability before investing in this amplifier to prevent any potential harm.

The fixed 90 Hz cut-off frequency for both the high and low-pass filters on the TS 400X4 may not appeal to some users who prefer more flexibility in their frequency settings.

Ideally, having the option to adjust or set the cut-off frequency at 60 Hz would be a great addition, especially for those who want to fine-tune the sub-bass frequencies.

At just 5 inches wide and 2 inches deep, the TS 400X4 is one of the most compact car amplifiers out there. Its diminutive size makes it a perfect fit for smaller cars or tight spaces, without sacrificing on power or audio quality.

Reason to buy
  • High power output
  • Bridged mode option
  • Compact size
  • Good audio quality
  • Easy to install
Reason to avoid
  • No adjustable filters

3: Skar Audio RP-75.4AB – Best budget 4 channel car amplifiers

Skar Audio RP-75.4AB

The Skar Audio RP-75.4 boasts a comprehensive frequency range that captures all the nuances of a musical piece, from the deepest bass notes to the most piercing high-pitched tones. With this amplifier, you can experience music as it was meant to be heard, with all its richness and depth.

The Skar Audio RP-75.4 offers an adjustable impedance that allows you to customize the power output to your needs. By switching to 4 ohms, you can optimize the RMS to a more moderate 75 watts, making it compatible with most speaker systems.

With a staggering 230 watts of output per channel in 2-channel mode, the Skar Audio RP-75.4 is a powerhouse that can easily handle the most demanding subwoofers available. Its bridged configuration ensures that you can enjoy thunderous bass and crisp, clear audio, even at high volumes.

The Skar Audio RP-75.4 comes with a signal input adjustment feature that lets you fine-tune the audio signal to your preference. By reducing distortion and unwanted noise, this feature enhances the clarity and detail of your music, allowing you to fully appreciate every note and beat.

With a flexible low-pass filter range of 50 Hz to 500 Hz, you can precisely tune the mid-bass and midrange frequencies to your liking. Moreover, the high-pass filter can be adjusted up to 5000 Hz, giving you control over the treble tones as well.

The amplifier can be fine-tuned by utilizing the signal limit feature to filter out unwanted distortion, delivering an even more pristine sound quality. With this added level of control, music lovers can now enjoy a cleaner, more precise audio experience.

The Bass EQ switch on the Skar Audio RP-75.4 add an extra oomph to music with the option to boost the low-end by 6 or 12 dB. This feature is perfect for those who want to feel the beat and bring more life to their listening experience.

Reason to buy
  • Covers full range of frequencies
  • Variable gain control for cleaner signal
  • Adjustable low- and high-pass filters
  • Bass EQ switch for boosted low-end
  • Can output up to 230 watts in 2-channel mode
Reason to avoid
  • Only Suitable for powerfull speakers.

4: JBL GX-A604 – Best small 4 channel car amplifiers

JBL GX-A604 1 Best 4 channel car amplifiers

JBL is a renowned name in the audiophile industry and has a reputation for producing high-grade products. The JBL 4 channel amp is a premium offering from the brand that comes with a price tag higher than its counterparts, but the quality of the product justifies the cost.

The design and construction of the amplifier are impressive, with a compact size that allows for easy installation in any setup. This amplifier is a great choice for high-end products with excellent sound quality and durability.

This 4 channel amplifier is a powerhouse when it comes to performance. It offers optimal power output for both 4-ohm and 2-ohm speaker setups, ensuring that your music experience is always exceptional.

With a maximum power output of 435 Watts, this amplifier provides 85W RMS X 4 at 2-Ohm impedance and 60W RMS X 4 at 4-Ohm impedance.

Its sleek design is coupled with a dedicated cast-aluminum heatsink to maintain a cool operating temperature even when your speakers are blasting at full volume.

The manufacturer JBL backs up the quality of this amplifier with a reliable 1-year warranty, giving you peace of mind as you enjoy your favorite tunes.

Reason to buy
  • High-grade quality
  • Compact size
  • Optimal power output
  • Sleek design
  • Reliable warranty
Reason to avoid
  • Output power could be better

5: Rockville RVF-2 – Best compact 4 channel car amplifiers

Rockville RVF-2 Best 4 channel car amplifiers

Rockville is a highly reliable and customer-oriented brand that offers premium-quality 4 channel car amplifiers. Choosing Rockville is a smart decision if you want a trusted and long-lasting audio solution for your vehicle.

The Rockville RVF-2 4 channel amplifier is a powerful piece of audio equipment that offers an impressive peak power output of 1200 Watts.

This makes it an ideal choice for those who are looking for high-quality sound reproduction in their car or home audio system. With a maximum RMS output of 75W per channel at 2 ohms and 55W per channel at 4 ohms, this amplifier can deliver clear and dynamic sound that is sure to impress even the most discerning audiophiles.

Additionally, when bridged at 4 ohms, the RVF-2 can provide up to 150W on both channels, making it a versatile amplifier that can handle a wide range of audio needs.

Apart from its impressive sound quality, the Rockville RVF-2 4 channel amp offers users a high level of control over their audio output. The fully adjustable 12dB bass equalizer, low pass filter, and high pass filter make it easy to customize the sound to suit any listening environment.

Moreover, the 1-year warranty adds an extra layer of protection and reassurance, giving users the confidence to use the amplifier without any worries.

Reason to buy
  • High power output
  • Clear and dynamic sound
  • Versatile bridged connection
  • Adjustable bass equalizer and filters
  • 1-year warranty
Reason to avoid
  • Incompatible with 8 ohm speakers.

6: BLAUPUNKT 1600W – Best 4 channel car amplifiers for bass


With Blaupunkt’s 4 channel amp, you can enhance your car audio experience and feel every beat and rhythm in your favorite songs.

One of the advantages of its small form factor is that it doesn’t take up much space in your vehicle, making installation a breeze.

In terms of performance, this 4 channel amp can deliver up to 1600 Watts of power distributed across its four channels, providing an immersive audio experience.

The versatility of the 4-channel amplifier is unmatched as it can handle both 2 ohm and 4 ohm speakers with ease.

Its exceptional RMS power output of 55W and 79W for 4 ohm and 2 ohm impedance, respectively, ensures that your car speakers will deliver crystal-clear sound.

This amplifier has been designed to provide a wide frequency response of 10Hz to 30kHz, which translates to an immersive listening experience.

Your car’s factory speakers will sound much better with this amplifier. Additionally, the amplifier comes with a 1-year warranty card, giving you peace of mind that you are investing in a product that is backed by the manufacturer.

Reason to buy
  • Small form factor
  • High power output
  • Wide frequency response
  • Handles both 2 and 4 ohm speakers
  • Comes with 1-year warranty
Reason to avoid
  • Falls in the middle in terms of build quality

7: Rockford Fosgate R2-500X4 – Best 4 channel car amplifiers for ultimate experience

Rockford Fosgate R2-500X4 Best 4 channel car amplifiers

Investing in a Rockford amplifier and speakers will not only boost your car’s sound system but also provide you with an immersive and exceptional listening experience on the go.

Rockford Fosgate R2-500X4 delivers a whopping 2000 Watts of power output, making it the undisputed king of this list.

And thanks to its Class D technology, you get crystal clear sound quality that’s evenly distributed across all channels. Trust me, your ears will thank you for investing in this powerhouse of an amplifier.

With 75 Watts x 4 power output at 4 ohms and 155 Watts x 4 power output at 2 ohms, you can drive a variety of speaker systems with ease. If you prefer a more powerful setup, the bridged connection option can provide up to 250 Watts x 2 power output at 4 ohms.

Additionally, this amplifier boasts fully adjustable 12 dB/octave high and low pass Butterworth crossovers, allowing you to fine-tune the sound to your liking. It also comes with a 1-year warranty.

Reason to buy
  • High power output (2000 Watts)
  • Crystal clear sound quality
  • Even distribution of sound
  • Can drive various speaker systems
  • Bridged connection option available
Reason to avoid
  • Not suitable for 8 ohm speakers.

8: Pioneer GM-A6704 – Best 4 channel car amplifiers for crystal clear sound

Pioneer GM-A6704

Pioneer is a highly reputable manufacturer of top-quality sound equipment, and their latest amp is no exception.This amplifier is perfect for powering up your speakers with its 1000 Watt maximum power output.

With a maximum output of 125 Watts on each channel at 4 ohm impedance and up to 250 Watts on each channel at 2 ohm impedance, you can expect an incredibly loud and clear output from your sound system.

The Pioneer amp has garnered a lot of praise from audiophiles due to its superior sound quality, versatility, and user-friendly features such as LPF, HPF, gain control, bass boost, etc. It’s also 2-ohm stable, which makes it easy to run multiple speakers without any issues.

Pioneer also provides a 1-year warranty for this amplifier, giving you peace of mind and confidence in your investment.

Reason to buy
  • High-quality sound output
  • User-friendly features
  • Versatile compatibility
  • 2-ohm stability
  • 1-year warranty
Reason to avoid
  • Expensive price point

9: Alpine S-A32F – Best 4 channel car amplifiers for better performance

Alpine S-A32F

Alpine is a top-tier brand when it comes to audio equipment, and their latest amplifier is no exception. It boasts both impressive performance and durable build quality.

It is Specifically designed for 2 ohm speaker setups, this amplifier provides a max power output of 640 Watts, which is quite impressive.

It offers 80 Watts RMS per channel at 2 ohm impedance, providing a powerful and clear sound.

If you prefer to use a 4 ohm impedance, the power output decreases slightly to 55 Watts RMS per channel, but it still produces an impressive sound. With this amplifier, you’re in for a treat when it comes to sound quality.

Whether you have a 2 ohm setup or not, you can expect an incredible listening experience. But if you do have a 2 ohm setup, be prepared to have your mind blown.

What’s more, this amp also comes equipped with variable low-pass and high-pass filters, as well as selectable bass boost, giving you even more control over your music.

It’s the perfect addition to your car if you want to enhance the quality of your listening experience. Having a 1-year warranty included you’re protected in the event of any potential issues.

Reason to buy
  • Impressive power output
  • Durable build quality
  • Designed for 2 ohm setups
  • Variable filters for more control
  • 1-year warranty included
Reason to avoid
  • Slightly lower power output at 4 ohm impedance

10: Planet Audio AC1200 – Best 4 channel car amplifiers for Thundering bass

Planet Audio AC1200

With a maximum power output of 1,200 watts, it’s capable of delivering crisp and clear sound quality that will enhance your overall listening experience. This is an ideal solution for those seeking a durable, compact, and powerful amplifier that saves space.

The built-in thermal protection ensures that it won’t overheat, giving you peace of mind knowing that your amplifier will last for years to come.

For those who want to enhance their car audio experience with a high-quality amplifier but have limited space, the Planet Audio 4-Channel Car Amplifier is an excellent choice.

With the ability to power four smaller speakers and tweeters, this amplifier delivers exceptional sound quality that will elevate your music to new heights.

At just 2.4 inches tall and 10 inches wide, it’s incredibly compact and can be easily mounted in a trunk or other small space.

While the Planet Audio 4-Channel Car Amplifier boasts impressive features, it is important to note that it is also one of the heaviest amplifiers on the market, weighing in at 7.2 pounds.

Additionally, some users have reported issues with the cable connections, which can break if overtightened. This can be frustrating for those looking to mount the amplifier in a compact space, such as under a seat.

Reason to buy
  • Powerful output (1,200W)
  • Exceptional sound quality
  • Built-in thermal protection
  • Compact design (2.4″ x 10″)
  • Enhances listening experience
Reason to avoid
  • Heavy (7.2 pounds)

Best 4-Channel Car Amplifiers – Buying Guide

Upgrading your car’s audio system can be exciting, but choosing the right amplifier is essential to achieving optimal sound quality.

To ensure that the unit you select is compatible with your existing stereo setup and suits your needs, it’s important to have a basic understanding of amplifiers and the factors to consider when shopping for one.

But don’t worry, I will discuss some of the most essential technical specifications and other important considerations when picking an amplifier for your car’s audio system.

Class And Efficiency

As you explore 4-channel amplifiers, you’ll find they’re classified into different ‘classes’. These classes mainly differ in their efficiency, which is the amount of AC that can be passed using minimal DC.

The four main classes of amplifiers are A, B, A/B, and D, each with its own unique features. Understanding these classes can help you choose an amplifier that meets your needs and requirements.

Class A

One of the notable characteristics of Class A amplifiers is their ability to deliver high-quality sound due to their simple circuit design. Unlike other amplifier classes, Class A amps conduct electricity continuously, which translates into a purer signal path.

However, this design also has a downside, resulting in low efficiency, with most of the electricity converted into heat energy. As a result, Class A amplifiers often have large heat sinks or fans to dissipate the heat generated.

While this may cause some inconvenience, the superior sound quality delivered by these amplifiers often outweighs the heating issues for many audiophiles.

Class B

Compared to Class A amplifiers, Class B amplifiers operate with a different design that conducts electricity for only half of the cycle, resulting in an increased efficiency of up to 70%. However, this approach introduces a small amount of distortion in the output signal.

Nonetheless, the advantages of Class B amplifiers make them a popular choice for many cost-effective and power-efficient applications, such as audio amplification in mobile devices or car audio systems.

Class  A/B

Class A/B amplifiers blend the best features of Class A and Class B circuits, offering high-quality sound with increased power efficiency. The inclusion of biasing diodes in Class A/B amplifiers eliminates the distortion issues commonly associated with pure Class B amplifiers.

These features make Class A/B amplifiers a popular choice for high-fidelity audio applications, such as home theater systems and professional studio monitors. The power efficiency and clear, dynamic sound also make Class A/B amplifiers well-suited for use in car audio systems.

Class D

Class D amplifiers have the highest efficiency (95%). This is largely because their output transistors don’t retain any electricity when the unit is turned off.

Hence, there is no excess electricity left to be converted to heat. Class D amplifiers, however, have the least signal purity out of all the classes mentioned above.

The Technical Specifications

When shopping for a car amplifier, it’s important to consider technical specifications that will determine its compatibility with your audio system. These include speaker sensitivity, frequency response, and power output.

The Number of Channels

When it comes to powering a subwoofer, it’s essential to consider the power requirements of the subwoofer. Generally, subs need more power than regular speakers; thus, a high-powered mono channel amplifier may be the best option. However, bridging a dual or 4-channel amplifier can also provide a significant power boost for your subwoofer.

Frequency Response

The frequency response of an amplifier defines its ability to handle different frequencies of an audio signal. Amplifiers designed for subwoofers have a limited frequency range, typically between 20 Hz to 250 Hz, while others can handle the entire audible spectrum.

Matching the amplifier’s frequency response with the speaker’s capability to achieve optimum sound quality is essential.

Speaker Sensitivity

Regarding speaker sensitivity, a high rating above 90dB means that the speaker can achieve a loud volume with minimal power from an amplifier. Conversely, a speaker with a low sensitivity rating requires a more powerful amplifier to reach the same volume level.

Power Output

To ensure that your speakers are not damaged, it’s important to select an amplifier whose RMS and peak power ratings are equal to or lower than those of the speakers. Failure to do so can result in heat damage to the speaker’s internal components, potentially rendering them irreparable.

best 4 channel car amplifier – FAQs

How Many Speakers Can I Put On A 4 Channel Amp?

When it comes to setting up a sound system, having multiple speakers can greatly enhance the audio experience. With a 4 channel amplifier, you have the option to connect up to four speakers, with each speaker receiving its own individual channel.

However, some 4 channel amplifiers offer the ability to connect two speakers to one channel, which can allow for up to eight speakers to be wired up. T

o take advantage of this feature, the amplifier must have a 2-ohm setting, which enables it to output twice the standard RMS power. Additionally, if the amplifier is bridgeable, you can even connect two subwoofers for added bass and depth to your audio.

Is A 4 Channel Amp Strong Enough For Subs?

You can efficiently power a pair of subwoofers by bridging your amplifier, providing a more dynamic and intense bass experience.

Additionally, with a 2-ohm setting, your amplifier can produce even more power, allowing you to turn up the volume without compromising the sound quality.

How Is A 4-Channel Amplifier Different From A 2-Channel Amp?

A 4-channel amplifier can power four or two stereo pairs, while a 2-channel amp can only power two or one stereo pair. A 4-channel amp generally has a higher power output than a 2-channel amp.

Will An Amp Make My Speakers Sound Better?

Yes, amplifying your speakers can greatly enhance the sound quality. An amplifier increases the power sent to your speakers, allowing them to produce louder and clearer sound with greater detail and precision. It can also improve the dynamic range, making the music sound more natural and lifelike.

Can I Connect An HU Which Has Only 2 Channels To A 4-Channel Amplifier?

It is possible to connect your head unit to both front and rear amplifiers using two RCA Y adapter cables. You can accomplish this by plugging the left RCA jack of your head unit into the inputs of both front and rear amplifiers and repeating the same process for the right RCA jack. With this setup, you will be able to enjoy quality audio output from all your speakers.


The Alpine MRV-F300 is an excellent choice for those who want a powerful and affordable 4-channel amp with impressive audio performance. Its compact design and class D technology make it an efficient option without compromising sound quality.

Looking for an affordable four-channel amp that delivers excellent value for your money? The Boss R1004 is a solid choice, with its class A/B full-range amplifier providing powerful and high-quality audio performance that won’t leave your wallet feeling empty.

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