Best 4 Channel Amp for Sound Quality

For anyone who loves listening to music in the car, a robust sound system is indispensable. Unfortunately, unless you own a high-end car, the audio system of a vehicle is quite unsatisfactory for true music enthusiasts.

1. Planet Audio AC1200 2. Rockford Fosgate R400-4D 3. Alpine MRV-F300
Planet Audio AC1200 Best 4 Channel Amp Rockford Fosgate R400-4D Prime Alpine MRV-F300 4-Channel Car Amplifier

On the brighter side of car stereos, one of the best ways to improve sounds in your car is with a quality amplifier. We’re huge fans of 4 channel amps for the bang-for-the buck value you get out of them.


The best 4-channel amp is one that boosts your car’s existing sound system while satisfying all your tuning requirements as well.

Though choosing a perfect amp might be difficult, we have tried to make your task easier by listing down some of the top 4-channel amps available in the market. Take a look at the products below!

Top 10 Best 4 Channel Amps 2021

1. Planet Audio AC1200

The Planet Audio AC1200.4 is among the best 4-channel amps if you are looking for a superior sound experience for your car.

Being a 2-ohm stable amplifier, it accepts as little impedance as 2 ohms, thereby producing more power. More power means more volume, so you will never be disappointed with its sound quality. It can easily power your car’s speakers and subwoofers with all channels using a load of 2 ohms each.

This is a class-A/B amp, which is more efficient and produces a better sound-quality than class-A amps. So, you can be sure of a smaller chance of sound distortion. Also, it features both high as well as low-level inputs which give you the flexibility you need for customizing your car audio system.

It features the superior MOSFET technology, which is among the most suitable Field-Effect Transistors (FETs) for use in cars as they require lesser current for their operation.

And last but not the least, you don’t need to think twice about safety precautions as the amp will do that for you! With an efficient thermal protection circuit, you can rest assured that the amp is protected against all electrical fluctuations.


  • Features variable low pass crossover and bass boost
  • Thermal protection circuit
  • High-performance and durable


  • The size makes it unsuitable for smaller cars


2. Rockford Fosgate R400-4D Prime

Looking for a highly efficient amplifier that can power a full-range car audio system without causing too much strain on its electric supply? The Rockford Fosgate R400-4D Prime is the best 4-channel amp that you can opt for!

Expect high-quality loud and clear sound amplification from this reliable 4-channel amp. With a total power output of 400 RMS watts, you can expect enough power for each of your full-range speakers!

It comes with an on-board Punch EQ, that allows you to increase the bass and treble as per your needs. It also features variable high and low pass crossovers.

The usage of the MOSFET power supply ensures that it is optimized for use in your car. It also features a triple-stage protection system that safeguards against thermal overloads, over-currents, and short circuits.

This power-packed class-D 4-channel amplifier is built to last. The cast aluminum body ensures that the inner components remain protected for a long duration. It also comes with a 1-year warranty.


  • Great sound quality and clarity
  • Durable
  • Comparatively lightweight


  • Supports only a minimum of 4-ohm load in bridged mode, making it less suitable for audiophiles


3. Alpine MRV-F300 4-Channel Car Amplifier

The Alpine MRV-F300 is one of the best choices if you want a Class-D 4-channel amplifier that packs compactness along with decent performance.

The amp is lightweight and stylish and features high-quality connectors. This ensures that all wiring connections are reliable and secure. The protective end caps make sure that the wiring stays protected against any chances of short circuits that may arise from coming in contact with metallic objects accidentally.

Being a class-D amp, it features ultra-fast switching for maximum efficiency. As a result, it doesn’t need a high internal power supply to operate, thereby also making it less prone to heating.

Coming to the most important part, the sound quality is crystal clear with solid bass. Also, distortion is a minimum, which adds to the wonderful sound experience.

The installation process for the amp is super easy, and its small size ensures that it fits just anywhere you want. In short, this is one of the best 4-channel amps that is affordable and efficient at the same time.


  • Compact
  • No heating problems
  • Comes with protective end caps


  • The Bass EQ boost doesn’t work on the 1/2 channel pair


4. Crunch PowerDrive PD4000.4 Amplifier

The Crunch PowerDrive PD4000.4 is a powerful 4000-watt class-A/B amplifier. It is among the best 4-channel amps in terms of its size and versatility.

It features an exclusive Crunch SPEED-FET wiring system that makes it highly power-efficient while also ensuring exquisite sound-quality with minimal distortion. A full-custom equalizer allows you to get a superior-level sound experience that is perfect for all music enthusiasts.

There are multiple operation modes that you can opt for, which include dual-bridged mono mode, dual stereo-bridged mode, 4-channel stereo mode, etc. Also, it comes with a bass boost, subsonic filter, and a high and low pass filter. So you have a lot of options for easy customization according to your preferences.

It features a quick thermal dispersion technology that works to keep the amp cool and minimize any distortion during normal use. Also, a very convenient LED system warns against overload and short circuits!


  • Minimal sound distortion
  • Lightweight


  • Can be prone to overheating


5. Kenwood KAC-M3004 Compact 4 Channel Digital Amplifier

Want a high-quality 4-channel amp that can fit in the smallest of places without any issues? The Kenwood KAC-M3004 is among the best 4-channel amps that are perfect if you have limited space but desire high efficiency.

With a peak power of 600 watts, this is a great option for cars with 3 or more speakers. This class-D amp provides a power of 50 watts RMS for each channel, which offers you just enough volume to cancel all outside sounds.

It features a built-in sensor that can sense audio signals from any channel, and automatically turns itself on. Connecting it with a pair of subwoofers is also super easy, you just need to bridge it to a 2-channel mode and you get 150 watts of power for each. So get ready to enhance the musical environment of your car.

This is a great option if you want to level up your music experience but are restricted in terms of space for installing audio equipment. Its small and compact size makes it a perfect fit even if you have a smaller car! Also, the high-quality materials ensure that the product lasts for a long time.


  • Compact size
  • Anti-moisture coating on the circuit board
  • Lightweight


  • Unsuitable for systems with bigger subwoofers


6. Rockford Fosgate R300X4

Getting a good quality 4-channel amplifier with a low budget can be a tough job. But with the Rockford Fosgate R300X4 Prime, we have got you covered!

It offers a lot of flexibility in terms of setup. You can get a power of 50 watts RMS when operating it at 4 ohms/channel and 75 watts RMS at 2 ohms/channel. Therefore, you can expect great sound-quality, no matter which setup you choose. Also, you can opt to run a subwoofer by bridging 2 channels with a power of 150 watts RMS at 4 ohms.

This class-A/B amp gives you optimum control over how you want to tune the sound effects. Also, the Punch EQ Control lets you adjust the bass boost levels as per your liking. The high and low filters ensure that it can support variable frequencies.

You can rest assured in terms of its safety, as it features built-in sensors that monitor against thermal, overload, or short circuits!

In short, the Rockford Fosgate R300X4 Prime is among the best 4-channel amps in terms of affordability, without compromising on its performance at the same time.


  • Versatile
  • Efficient cooling system
  • Affordable


  • It is not compatible with an impedance less than 4 ohms in bridged mode


7. Boss Audio Systems R1004

What can be better than a 4-channel amplifier that doesn’t disappoint in terms of efficiency, safety, and performance? The BOSS Audio Systems R1004 is among the best 4-channel amps that offer you just that. And that too at a very reasonable price!

This class-A/B 4-channel amp features linear circuits that maximize power and sound quality, while simultaneously minimizing distortion. The high and low-level inputs make it quite flexible, allowing you to create a customized sound system.

It is 2-ohm stable, and can conveniently power your speakers and subwoofers using a 2-ohm load. Also, it can be connected to any standard source unit; thanks to its Switchable Input Sensitivity feature.

You have virtually no chances of accidents with this product, with an efficient system that automatically shuts down if it gets overheated or identifies any chances of short circuit.


  • Low distortion
  • Features MOSFET power supply
  • 2-ohm stable


  • Is not bridgeable


8. JL Audio JX400

Do you want a high-performance amp that doesn’t take much space? The JL Audio JX400/4D is among the best 4-channel amps perfect for all music lovers.

This compact 4-channel amp from one of the top car audio brands in the market is guaranteed to blow your mind with its superb performance! The JL Audio NexD amplifier technology ensures that you get the best sound experience without much strain on your car’s electrical system.

You get a power of 70 watts RMS per channel when operating at 4 ohms and 100 watts RMS at 2 ohms. You can also run your subwoofers at a power of 200 watts RMS in bridged mode. It provides you enough volume and power irrespective of the channel configuration you choose.

For safety, it features 3-way protection against thermal, overload, and electric shorts. Also, this class D amplifier does not produce too much heat, so you can install it anywhere without any worry of overheating.

The amp scores more points in terms of its looks. The stylish yet compact design complete with LED lights is sure to increase the allure of the car’s interior.


  • Installation is easy
  • Compact but powerful
  • Reliable MOSFET power supply


  • Is somewhat expensive in comparison to other 4-channel amps


9. Nvx VAD10004 1000W

Want a powerful amp that can give a clean sound experience and is ideal for small spaces? The NVX VAD10004 1000W RMS 4-Channel Amplifier is probably the best 4-channel amp that you can get!

Featuring a minimalistic design, this class-D amp will provide you with the cleanest and most spectacular performance when it comes to sound quality. It also features a revolutionary IR Chip, which minimizes the chances of high-frequency interferences that are generally associated with class-D amplifiers.

It is a versatile product and is suitable for use not only in cars and SUVs but also on boats, motorcycles, ATVs, etc. The materials used in its construction make it less prone to corrosion, thereby adding to its durability.

The NVX VAD10004 is created to be tough. It has a strong aluminum body to protect from external harm, while the 3-way internal protection circuit keeps it safe from any accidents.


  • Great sound quality
  • Minimal distortion
  • Compact size


  • Can be prone to heating


10. Blaupunkt AMP1604

The Blaupunkt AMP1604 is a compact 4-channel amplifier that is efficient enough to power the front and rear speakers of your car with 55 watts RMS per channel. It gives you a high-quality sound effect with enhanced clarity.

One of the best 4-channel amps, this is a great choice if you want a decent product within a tight budget. Featuring selectable high pass filters and variable low pass filters, it gives you a cleaner audio output with reduced sound distortions.

This full-range amp can easily run two subwoofers at a power of 165 watts RMS each in bridged mode. You can also control the bass level with its separate bass boost controls for both the front and rear speakers.

This efficient product is suitable even for smaller cars, and its aluminum heatsink ensures that it stays remarkably cool even after long-duration use.


  • Great sound clarity
  • Compact design
  • Not prone to overheating
  • Affordable


  • Incompatible with an impedance less than 4 ohms in bridged mode


Factors To Consider When Buying The Best 4 Channel Amps

There are several factors that you need to keep in mind while choosing the best 4-channel amp so that you refrain from making a bad choice.

Before selecting an amp, you need to note down all the features that you require. Also, you need to check whether the product you choose is compatible with your car or not. The last thing you want after spending hours deciding the perfect option is that it doesn’t work for your car.

To save you the trouble, here we have identified and listed down some of the major factors that you should keep in mind while choosing the best 4-channel amp. We hope that you will find it helpful.

1. Power

Well, to amplify the sound from your car’s system, the amp has to be powerful. And in this case, the power is determined in its wattage. So, while choosing the best 4-channel amp, you need to ensure that it has the required power to run all your speakers or subs smoothly.

In general, a power between 50 to 75 watts RMS per channel is sufficient for producing enough volume. Also, amps with this amount of power can be bridged with your subwoofers for increased bass, if that option is supported.

While higher power means enhanced volume, you will also need more power to run the amp. This may require you to install an extra battery for the amp. Therefore, make sure you make your choice after weighing your options.

2. Size

The second most important factor that you need to consider while choosing the best 4-channel amp is its size. Before going on a hunt for the perfect amp, you need to determine the amount of space that you have or are willing to spare for the machine.

Size may not be much of an issue for you if you have plenty of extra space in your car, or own an SUV. In that case you could easily choose one whose specifications meet all your demands.

But if you have a smaller car and have limited installation space for the 4 channel amp, you need to make sure that the amp you choose will fit within the space that you can spare. With the huge number of small and compact amps available in the market, this will surely not be much of an issue.

Also, while more powerful amps are generally bigger, it doesn’t mean that you cannot get a decent one in a compact size.

3. Protection

Protection or safety is also of the utmost importance when you are choosing the best 4-channel amp. This is especially true since there are increased chances of overheating or short circuits in an amp, which can be the cause of unwanted accidents.

Many amps are prone to heating, especially if they are used for longer durations. To safeguard against this, amps do come equipped with equipment or sensors that can tackle overheating.

Also, being electronic products, there is a chance of electric short circuits from overload. This can increase when you are using more power to run your speakers and subwoofers. Moreover, amps are often installed under the seats to save space, and therefore it becomes more difficult to immediately be aware of any short circuits.

To avoid all mishaps, you should make sure that you look at all the safety measures that are included with the amp. On the brighter side, most of the top 4-channel amps come equipped with safety sensors that monitor against these and immediately cut off power if any such situations occur.

FAQs on 4 Channel Amps

  1. What Is A 4-channel Amplifier?

    Car amplifiers are used to boost the audio signals from your car’s audio system to increase the volume and quality of the sound. It is available in both single-channel and multi-channel versions.
    A 4-channel amplifier is an amp with 4 power sources; hence, it can power four speakers (or 2 speakers and a subwoofer) simultaneously. Four-channel amps are the perfect products to go for if you are a music enthusiast and like to use both the front and rear speakers to run your music.

  2. Is A 4-channel Amp Worth It?

    We love 4-channel amps for most people. In all of our cars and trucks, we only install 4 channel amps now for the past 10 years.
    We think they’re the best compromise on power, cooling, and space. With the technology today, you can get a great 4 channel amp at a decent price.
    Wiring and other issues like grounding feedback are greatly simplified with a 4 channel amp.
    Our preference is a 4-channel amp to drive the speakers and a separate mono amp to drive a sub (if we feel we need a sub in that car).

  3. Is A 4-channel Amp Good For Subs?

    If you are thinking of buying a 4-channel amp, you might be wondering if you could run your subwoofer on it too. Well, you definitely can.
    Four-channel amps are great for running two speakers and a powerful subwoofer to provide you with great-quality sound. Also, it is possible to run two subs on your amp by running it on bridged mode.

Best 4 Channel Amps – Conclusion

Deciding on the ideal 4-channel amp is tough, especially due to the many awesome options that you have. To ensure that you make the right choice, you need to determine your exact requirements in terms of space, power, safety, and price, and then look for an amp matching all your requirements.

We have tried to help you in making your choice by describing some of the best 4-channel amps above. We have made sure to include all the relevant details regarding each product so that you know all about their advantages and disadvantages.

While all the above products are great in their own right, we recommend that you go through the above descriptions to identify the amp that is just right for you!

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