Best 4 Channel Car Amplifier for Sound Quality

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In most cases, car stereo systems are unimpressive, especially if you are a music lover. Default stereo systems are hard to customize and therefore not perfect for extensive music consumption. Fortunately, most car manufacturers allow car owners to replace the default stereos with high-end systems.

While there are tens of high-end stereo systems, 4-Channel car amplifiers are unmatched. Unlike 2-Channel amps, you have the freedom to add more components to your sound system and therefore having the best music on your car. Also, this type of amp is powerful and uses fewer wires. Overall, investing in a 4-Channel car amp minimizes wiring in your vehicle.

What’s The Best 4-Channel Car Amplifier? 

Since people have different needs when it comes to 4-Channel car amps, the definition of “the best amp” is subjective. However, any ideal amp must have some key characteristics. Some of the key features to look at in a component include:

  • Ability to produce better sound quality 

The first characteristic of a good 4-Channel amp is the ability to produce better sound quality. If you can achieve quality sound, then the amp is quality.

  • The ability to power a subwoofer 

Any perfect 4-Channel subwoofer must have the ability to power a subwoofer. While some users may not be interested in adding a subwoofer to their car system, buying a powerful amp allows you to upgrade the sound system in the future.

 

Top 10 Best 4 Channel Car Amp Reviews – 2021

Since there are tons of 4-Channel car amps in the market, buying one can be a challenge. For example, distinguishing generic units from the traditional market leaders may be tiresome. However, it is still possible to purchase quality amps from e-commerce sites.

Based on the above definition of a quality 4-Channel Amp, here are the best ten units for your car sound system. All the above amps are improved for more power and fewer installation requirements.

 

#1: Rockford Fosgate R300X4 Prime 4-Channel Amplifier

Are you looking for a 4-Channel amplifier that is versatile and loud? The Rockford Fosgate amplifier is a perfect buy for you. You can connect full-range speakers and component speakers on its front channel easily. If you want to include a woofer in your cat system, the R300X4 will work fine in bridging the power.

Special Features

The features that make the Rockford Fosgate R300X4 an ideal component to your system include:

Two separate gain controls

The most notable user-friendly feature in the  R300X4 amplifier is the front and rear gain controls. Apart from giving you multiple avenues to customize your car sound, the gain controls give the amp a small profile.

2/4 channel input switch

The  R300X4 amp has a 2/4 channel input switch. With this feature, it is possible to achieve smooth crossover and, therefore, zero sound distortion.

Specification table

Amp weight 7.5 pounds
Item model R300X4
Batteries One 12V battery required
Amp dimension 13.1 × 6.7 × 1.98 inches

Reasons to Buy

The reasons why you should buy the R300X4 amp include:

  • Versatility
  • Active crossover
  • Small profile
  • Unmatched sound quality
  • Zero sound distortion

Reason to Avoid

  • The R300X4 has a passive fan, which may not match the power generated by the amp.

Why we recommend it

We recommend the amp because of two reasons. They include:

The amp is versatile.

The versatility of the amp is the first reason why we believe it is a perfect buy. Thanks to this feature, you can include full-range speakers or component speakers (with subwoofers). Regardless of the speakers, you will still have the liberty to run mono or bridged mode.

The R300X4 has unmatched sound quality.

Apart from its versatility, the amp is a critical addition to your car’s sound system. The four channels improve the sound quality, regardless of the speakers paired with it.

 

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#2: Kenwood KAC-M3004 Digital Amplifier

The Kenwood KAC-M3004 is one of the best four-channel amplifiers for car music systems. This unit can power each of the four channels with 50 watts of power. Therefore, you can add a subwoofer to your system without overpowering the amp or jeopardizing the music quality.

Special Features

The Kenwood KAC-M3004 amp has the following specs.

Rockford Fosgate PBR300X4

Specification table

Amp weight 2.2 pounds
Signal to noise ratio 90dB
Number of channels 4
Amp dimension 6.69 × 3.15 × 5.91 inches

Reasons to Buy

The reasons why you should buy the Kenwood KAC-M3004 amp include:

  • Adjustable settings
  • Clear sound
  • Zero distortion
  • Minimal design

Reason to Avoid

  • Heats up quickly

Why we recommend it

After a series of tests, we believe that this is an ideal amp. Some of the highlights about using this amplifier and not others include:

The sound quality is unmatched.

The Kenwood KAC-M3004 amplifier is a high-end unit with the ability to produce a clear sound. Whether you will use a subwoofer in your car system or not, this amp will not disappoint.

The amp is easy to use

The usability of the amp makes it a perfect buy for all users. Regardless of whether you have used an amp before or not, you will not have challenges controlling different aspects of this unit.

 

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#3: JL Audio XD400/4v2 amplifier

Are you looking for a well-rounded amplifier? The JL Audio XD400/4v2 amplifier is ideal for different users. For instance, it is powerful and well priced. Therefore, if you are building a sound system and you do not mind spending more for a better unit, this is the perfect amp to buy. Besides its power and pricing, the amp has a compact design.

Special Features

The features that make the new JL Audio XD400/4v2 amplifier ideal include:

Separate gain controls

The first feature that makes this amp unique is the availability to separate gain controls. It has front and rear gain controls, which are easily accessible. Apart from the car sound, the controls help navigate the unit and, therefore, better sound.

More power through the channels

The amplifier is an ideal purchase because of its power, which is 100 watts on each channel. With this watt capacity, you can power any subwoofer and a pair of speakers without the amp overheating.

Specification table

Amp weight 5.65 pound
Signal to noise ratio 95dB
Number of channels 4
Amp dimension 11.5 × 8.5 × 3.75 inches

Reasons to Buy

The amp is a premium buy and therefore has bleeding-edge specs. Some of the main reasons why you should consider it include:

  • More adjustable settings
  • The amp is powerful
  • Higher S/N ratio of 955dB
  • It has zero sound distortion, mostly if you prefer neat wiring.

Reason to Avoid

  • The amp overheats

Why we recommend it

After a series of trials, we believe that this amp is worth your money. The two key aspects that stood most include:

The sound quality is clear.

An amplifier is a high-end unit and, therefore, can produce a clear sound. Regardless of whether you will use a subwoofer in your sound system or not, this unit will not disappoint.

The presence of universal connectors

Besides having better sound, the unit has some of the best connectors. The quality of connectors means that the amp’s sound is better and ideal for all car owners. Besides, the sound to noise ratio is 95dB, which is topnotch.

 

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#4: Skar Audio RP-75.4AB Amplifier

With a wider crossover frequency range, the Skar Audio RP-75.4AB Amplifier is a perfect component of a good sound system. The amplifier has more adjustable controls for customized listening, especially considering it is a high-end unit. Finally, the unit has a signal to noise ratio of 105dB, which is impressive at this price point.

Special Features

The features that make the Skar Audio RP-75.4AB Amplifier a perfect option for car owners revamping their sound systems include:

More adjustable controls

The beauty of installing a new sound system is customizing the sound going to the subwoofer and speakers. In this case, you can adjust the Variable LPF, Base EQ, Gain, and HPF.

More watts through the four channels

The Skar Audio RP-75.4AB Amplifier is an ideal unit because of its power. In total, the amp has a 500 watts capacity, which is impressive considering it has a minimal design. With this capacity, you can power any subwoofer and two speakers without overworking it.

Specification table

Amp weight 7.4 pounds
Signal to noise ratio 105dB
Number of channels 4
Amp dimension 19.5 × 7 × 3 inches

Reasons to Buy

The amp has high-end specs. Some of the specs that make this amp worth investing include:

  • Easy to set-up
  • Powerful unit
  • Versatile
  • Better sound quality
  • Clip indicator

Reason to Avoid

  • The internal fan may not keep the amp cool.

Why we recommend it

Skar Audio RP-75.4AB Amplifier is worth investing in, regardless of what kind of music system you want to achieve. Some of the key reasons why we recommend this amp over others include:

Ease to use

The amp is easy to use,  even though it is powerful. You can control many aspects of the sound going to the speakers, even if you have never installed a sound system before.

Skar Audio RP-75.4AB Amplifier is powerful.

The amp is powerful, and you can easily power all types of speakers and subwoofers. Therefore, if you are looking for the best amp for your car system, this amp is worth checking.

 

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#5: Kicker 43CXA3004 Four-Channel Full-Range Amplifier

Are you looking for a full-range amplifier? The new (and improved) Kicker 43CXA3004 amp is a perfect addition to your car’s sound system. The unit is rugged and compact. Although the size is relatively big compared to other alternatives, you can put it anywhere in your car without compromising its power and form factor.

Special Features

The specs that make Kicker 43CXA3004 amp a premium buy include:

Impressive S/N ratio of 95dB

The most iconic feature on this amp is the impressive S/N ratio of 85dB. With this feature, you can get one of the best sound outputs on car sound systems.

Better construction

Besides the impressive sound output, the amp has an exceptional built quality. Even though Kicker 43CXA3004 falls under budget amps, it can last longer, thanks to its excellent form factor.

Specification table

Amp weight 5.5 pounds
Signal to noise ratio 95dB
Number of channels 4
Amp dimension 15 × 9.50 × 4.00 inches

Reasons to Buy

The reasons to buy this amp include:

  • Better sound quality
  • Inexpensive amp
  • Versatile amp
  • Has clip indicator

Reason to Avoid

  • Has no internal fusing

Why we recommend it

We recommend the Kicker 43CXA3004 amp because of some reasons. They include:

The amp has impressive sound output.

The first reason why we recommend this amp is the quality of sound. As a car owner, the unit will assist in making your sound system unmatched. Even with average speakers, the amp has an unmatched ability to produce clear and better sound.

Best value for money

Besides the sound quality, the amp is the best value for your money. While the amp falls under the budget category, it has bleeding-edge specs. You can use the money saved in other aspects of your car sound system.

 

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#6: Rockford Fosgate P400X4 Punch Amplifier 

The new amp continues the impressive Rockford Fosgate’s tradition of making impressive sound accessories. First, the amp is versatile and, therefore, perfect for all types of sound systems. Besides its versatility, the Rockford Fosgate P400X4 is compact and powerful. Additionally, the amp has a Class A/B topography, which makes it easier to have neat wiring.

Special Features

The specifications on the Rockford Fosgate P400X4 amplifier makes it a premium unit. Some of the key features include:

An improved versatile multi-channel design

The first feature that sets this amp aside from the others is the versatility of its multi-channel design. This design fits perfectly in all car systems, especially where power and sound clarity are needed.

Class A/B topography

This amplifier is a perfect buy for you if you prefer neat wiring, thanks to the Class A/B topography. Unlike other options, you will not need to have wiring hanging on your system dangerously.

Specification table

Amp weight 6.93 pounds
Signal to noise ratio 105dB
Number of channels 4
Amp dimension 11.03 × 7.76 × 2.38 inches

Reasons to Buy

The Rockford Fosgate P400X4 amp is worth trying because of several reasons. Some include:

  • Powerful sound
  • Easy to set up
  • The 105dB S/N ratio
  • Unmatched form factor

Reason to Avoid

  • The amp is relatively expensive.

Why we recommend it

We recommend the new Rockford Fosgate P400X4 because of many reasons. Some of the key reasons why you should invest in this unit include:

The overall design

The amplifier’s design makes it one of the best options for all sound systems. First, it has Class A/B topography, which is ideal for minimal wiring. Also, the amp is small, and you can put it anywhere when connecting to a car’s sound system.

The Rockford Fosgate P400X4 amp is powerful.

Besides the overall design, the amp is undeniably one of the most powerful units in the market. Therefore, you can plug it into any sound system, and it will still deliver.

 

#7: Alpine X-A70F X-Series Amplifier

Alpine X-A70F X-Series amplifier is one of the most powerful units based on RMS power per channel. Besides its impressive power, the amp is synonymous with remarkable sound, ranging from 5Hz to 100kHZ in frequency. The unit also has the least noise on this list, with the highest S/N ratio of 115dB.

Special Features

The Alpine X-A70F X-Series amp is a premium accessory. Some of the key specs include:

More power

The first feature that stands out with this amp is the power on each of the four channels. The power from each channel means that you can power speakers and subwoofers without the unit overheating.

Impressive S/N ratio

The 115dB ratio is impressive, especially if you want to enjoy music in your car. The higher S/N ratio also means that the sound quality is unmatched, regardless of the speaker’s quality.

Specification table

Amp weight 1 pound
Signal to noise ratio 115dB
Number of channels 4
Amp dimension 13 × 9.5 × 5.75 inches

Reasons to Buy

The reasons why you should consider this amp include:

  • More power on each channel
  • Zero sound distortion
  • Higher S/N ratio of 115dB
  • Adjustable settings

Reason to Avoid

  • The amp overheats

Why we recommend it

We recommend the amp because of many reasons. Some of the nobble reasons why this amp is worth checking include:

Best deal for the money

The amp has one of the best balances between what you pay and what you get. First, it is a powerful amp and can easily power any music system. Besides power, the amp has the lowest sound to noise ratios on this list.

Easy to set up

Apart from its power, the amp is easy to set up. Whether you have prior experience or not, setting up this amp is easy.

 

#8: Rockford Fosgate T400-4 Amplifier

The Rockford Fosgate T400-4 amplifier is a strong alternative to people building a sound system for their cars. With 400 watts of power, the unit can easily power any sound system with minimal overheating or compromising the sound quality. Besides the power, the amp is well-built, especially for a car sound system.

Special Features

The Rockford Fosgate T400-4 amplifier is unique because of its different features. The key features include:

More power

The 400 watts on this amplifier makes it a perfect option for car owners looking for a powerful unit. With this power, you can connect the amp to two pairs of speakers. If you want to incorporate a subwoofer, add one with two speakers.

Better form factor

The built quality of the Rockford Fosgate T400-4 Amplifier is arguably one of the best. The minimal design makes the unit an ideal buy for all types of car systems. The amp’s size is also suitable if you have a smaller space in your car for the sound system.

Specification table

Amp weight 14.45 pound
Signal to noise ratio 95dB
Number of channels 4
Amp dimension 2.14 × 8.14 × 14.91 inches

Reasons to Buy

Apart from the impressive balance between what you pay and what you get, there are many reasons why you should buy the Rockford Fosgate T400-4 Amplifier. They include:

  • The amp is powerful
  • Easy to install
  • Durable
  • Minimal design

Reason to Avoid

  • The internal fan is inferior compared to the heat emitted from the amp.

Why we recommend it

We recommend the Rockford Fosgate T400-4 amplifier because of two reasons:

The easiness to connect

Thanks to the overall design, you can connect the amp to any sound system faster. The ease of connecting the unit to sound systems does not compromise its overall functionality.

The amp is powerful

The 400 watts amp is powerful, and you can incorporate it into any sound system. While the fan may not match the unit’s ability, other aspects make it perfect for all car users.

 

#9: Taramp’s TS 400X4 4 Channel Amplifier

Taramp’s TS 400X4 is a user-friendly unit and one of the most affordable amps in the market. Therefore, if you upgrade your car’s sound system, this is a must-have accessory for better sound quality. With four channels and 400 watts capacity, you can achieve a crispy and loud-enough sound. Also, the small form factor makes the 400X4 amplifier easier to place anywhere in the car.

Special Features

The specs that make the 400X4 amp standout include:

Small form factor

When building a sound system for your car, the amp’s size is a critical determiner of the overall wiring and sound quality. Fortunately, the amp has a minimal design, and you can put it anywhere and therefore do minimal wiring.

Has better connectors

Besides having a minimal design, the amp has some of the best connectors in this niche. The quality of connectors means that the sound from the amp is high quality. Also, the sound to noise ratio is 90dB, which is unmatched.

Specification table

Amp weight 1.58 pounds
Signal to noise ratio 90dB
Number of channels 4
Amp dimension 4.14 × 1.97 × 6.30 inches

Reasons to Buy

The factors that make this amp worth investing include:

  • Easy to set-up
  • Unmatched thermal protection
  • Versatility is unmatched
  • The amp has a clip indicator.

Reason to Avoid

  • The amp does not have an internal fuse.

Why we recommend it

After testing the Taramp’s TS 400X4 amp, we believe that it is worth buying. Some of the reasons include:

The amp has thermal protection.

Since the amp is one of the most powerful units on this list, it generates heat. Fortunately, thermal protection makes it easier to reduce the impact of heat. Also, the unit disposes of heat faster.

Unmatched sound

The Taramp’s TS 400X4 amp is also ideal for car owners interested in sound quality. The sound transmitted to the speakers is crispy and loud enough. Therefore, you will not need any extra channels to amplify the sound from your audio system.

 

#10: Rockford Fosgate PBR300X4 Amplifier 

The Rockford Fosgate PBR300X4 is a versatile option for car owners transitioning from factory sound systems to this niche. uWith four channels and 300 watts capacity, you can achieve a crispy and loud-enough sound. Although the watts count is relatively lower than most units on this list, the amp has a unique design.

Special Features

The  Rockford Fosgate PBR300X4 amplifier has many unique specs. The main ones include:

Compact design

When installing a sound system, the amp’s size is a critical determiner of wiring and overall sound quality. This amp has a minimal design, and the wiring needed is minimal.

More power through the channels

Rockford Fosgate PBR300X4 is an ideal unit because of its watts’ count. It has a 300 watts capacity, which is enough considering it has a small factor. You can power a subwoofer and two speakers without overworking the amplifier.

Specification table

Amp weight 2.53 pound
Signal to noise ratio 115dB
Number of channels 4
Amp dimension 9.0 × 6.o × 4.3 inches

Reasons to Buy

There are tons of reasons why this amp is worth buying. However, the top five reasons why you should pick this unit include:

  • It is powerful
  • Easy to set up
  • Better sound quality
  • Versatile amp
  • Has clip indicator

Reason to Avoid

  • The internal fan may not match the amp’s power.

Why we recommend it

After a series of trials, we believe that the amp is a perfect addition to your car’s sound system. The two main reasons include:

The amp is the best deal for your money.

The Rockford Fosgate PBR300X4 amp has one of the best balances between what you pay and the amp’s power. It is a premium amp and can fit in any music system. Besides, it has the lowest sound to noise ratio.

The Rockford Fosgate PBR300X4 is easy to use

The usability of the Rockford Fosgate PBR300X4 makes it a perfect unit for car sound systems. Whether you have used a similar machine or not, you will not have any problem controlling different aspects of this unit.

 

You can check also more reviews & guide from Amazier

 

What is a 4 Channel Amp 

An Amp is a device in a sound system that amplifies an electrical signal. The amplified sound goes to the speaker, tweeters, or subwoofers via its channels. In a 4 Channel Amp, the amplified channel goes through four channels.

In most cases, a 4-Channel Amp powers four speakers. The most common set-up is often a 6*9s (front speakers). The Amp can also power a subwoofer (which will have two bridged channels) and two front speakers.

In some exceptional cases, a four-channel amplifier can bridge combined power from multiple channels. The process is called bridging. When bridging power from two channels, the amp’s output is double. Unfortunately, bridging is only a feature found in high-quality amps.

 

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How to Choose The Best 4 Channel Car Amp with Good Sound Quality 

Since four-channel car amplifiers are not as cheap as other accessories in a sound system, you need to make the right decision when buying one. Unfortunately, there are tens of brands available for car owners. However, you can still buy a good amplifier by following these fundamental pointers.

The sound quality

The first important consideration when investing in a 4-channel is sound quality. While the sound quality is a subjective aspect, different amplifiers have different sound outputs. An ideal amplifier should have a lower noise compared to sound. In a perfect situation, the sound to noise ratio should be at least 90dB.

The channel’s power output

Apart from the sound quality, an ideal four-channel amplifier should have a decent power output. While the speakers and subwoofer on your sound system play a role in determining the needed watts count, an ideal unit should have at least 300 watts in the four channels.

The overall design

The amp design is a crucial element to consider shopping for one. The smaller design, for example, is more comfortable to put anywhere in your car. On the other hand, a bigger amplifier may have a bigger internal fan but may not fit your vehicle.

The internal fan

In most cases, amplifiers produce a lot of heat. While most amplifiers have internal fans, they are inferior. In most cases, the weaker fans make the amplifiers hot, even when the output is not as demanding as when functioning optimally.

Therefore, if you prefer an excellent functioning amplifier, you must invest in an amplifier with a good fan.

 

Advantages Of 4 Channel Amplifiers 

If you are uncertain about why you should invest in a 4-channel amplifier, here are some reasons why these amps are unmatched.

Minimal wiring

While it is possible to hide wiring in a car, over-wiring the vehicle is deemed unprofessional. Fortunately, the 4-Channel amplifiers use fewer wires and, therefore, less wiring in your vehicle.

Better sound quality

Compared to 2-Channel amplifiers, these units produce the best sound. The amps can power more accessories in a system, and more importantly, the channels amplify the sound better and in a more balanced way.

Ability to support more accessories in a sound system

The main reason why these amps are referred to as 4-Channel is the presence of four sound channels. Therefore, you can add up to four speakers or use two channels to power a subwoofer.

 

4 Channel Car Amp FAQs 

How many speakers can a four-channel amp power?

A: A 4 channel car amp can connect up to two pairs of speakers. Ideally, each of the four speakers gets power from each channel. Therefore, if the amplifier has a 400 watts capacity, each speaker will get up to 100 watts.

However, the above assumption does not factor in the quality (and brand) of the speakers connected. If the speakers are powerful, some amplifiers may not power them efficiently. The golden rule is to understand how much power your speakers need and try matching that with speakers available.

How many amps do I need for my car audio system?

A: Different sound systems require different amounts of power. For example, if you plan to include more than two speakers and subwoofers, it is advisable to invest in more amps. However, if your system is necessary, consisting of two speakers and a subwoofer, you only need a single 4-channel amp.

However, if you want to get more power to your car system, it is wise to hire a professional if you have never done any intricate wiring. However, if you have background knowledge on wiring, connecting more than one amp is not as complex as it sounds.

What is the best four-channel car amplifier?

A: Is a four-channel amp good for subs?

A: Yes. Unlike two-channel amps, these amps have the unmatched ability to amplify power going to the subwoofers. Also, unlike other amps, you can add two speakers to the system without overpowering the amp.

However, when connecting a subwoofer to an amp, there are some things to consider. The first consideration is to ensure that the amp can power the subwoofer. Other factors include general compatibility and the presence of internal fusing due to overheating.

What is the difference between 2 channel and four-channel amplifiers?

A: The main difference between 2 channel and four-channel amplifiers is the number of channels. The two-channel amps have two outputs while the other amps have four. The difference in terms of output channels dictates two things, power and the ability to connect more accessories. For example, a four-channel amplifier can accommodate up to four speakers or two speakers and a subwoofer.

If you have a basic sound system that needs speakers and nothing more, then the two-channel amplifier will work fine. However, if you want more power and the ability to connect more peripherals, the four-channel amplifier is perfect.

What is the best four-channel amp?

A: Over the years, the definition of an ideal 4 Channel amp has changed. One of the reasons for these changes and advancements in this niche. Therefore, the understanding of “the best four-channel amp” varies from one person to another. Also, different people want different features in amps.

However, the above ten amps are ideal for all types of users. If you prefer a powerful amp, there is an amplifier perfect for you. The same case applies to those interested in smaller and well-constructed amps. The golden rule is to have a definite checklist when buying an amp for your car.

 

Final Thoughts on The Top 4-Channel Amplifiers for a Car

The four-channel amplifiers are the missing link between your car sound system and what you have always dreamt about as a car owner. Any of the above amps can amplify the sound from your system to speakers and subwoofer impressively well. While some amps are more potent than others, they all have the potential of improving the quality of sound on your car.

Besides the ten units, the piece explores some of the factors to consider when investing in an amp. The golden rule is to make as much knowledge as possible and make decisions while buying an amp.

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