These Are The Best 4 Channel Car Amplifiers of 2020

Adding a car amplifier is one of the most cost effective ways that you can improve the sound quality of audio system in your car. 4 channel amplifiers are a great place to start this journey. An amplifier’s main job is to boost the signal that the head unit gives to drive more powerful speakers and improve audio quality of the sound your system produces.

Our Top Pick


This amplifier is one of the most powerful, rugged, and flexible 4 channel amplifiers on the market. It packs a great punch, and will transform your car audio.

  • Rugged
  • High Quality
  • Great Brand
  • Brilliant Sound Quality

Why Purchase a 4 Channel Amplifier

A lot of aftermarket speakers will need more power than a car’s head unit can provide in order to operate correctly.
Without an outboard amplifier, you will never experience true high-quality music reproduction in your car.
If you believe in doing justice to the music, using a separate, high quality amplifier is tremendously convenient especially if you are a music junkie and an audio enthusiast.
Choosing a good car amplifier can be a challenging job seeing that there are so many types, models and brands in the market. This is where I hope to be of assistance to you and as such will lend my expertise and love for quality audio, so that you have the best audio experience for your vehicle.

What is a 4 Channel Amp?

A 4 channel amplifier actually offers a wide variety of options, and are the perfect type for powering a couple pairs of speakers. These can also be used to power a pair of door speakers by being used with two channels while bridging the output of the other 2 channels in order to drive a subwoofer. By this you will be able to enjoy very clean highs and very powerful, full lows out of one package. Pretty Impressive, isn’t it?
For more information on 4 Channel Amplifiers, check out our buying guide.

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Best 4 Channel Amp Reviews

The Rockford Fosgate R400-4D little Amp packs quite a punch! You will not find a better Class D 4 channel amplifier for this price. This amp provides a great value for money. Rockford Fosgate is a preferred brand by experts, and you will find that this is one of the best 4 channel amplifiers out there.
You can power a full range front and rear speaker system with this Class D 4 channel amps. This amp allows you to also bridge the front and/or rear channels enabling you to power a subwoofer or two. Click here for more information on bridging amplifiers. Rockford Fosgate’s design allows for efficiency with a cast aluminum heat sink that allows it to be used in a confined space.
This amp also comes with a top mounted LED indicator that shows blue whenever the unit is turned on and the LED light turns to red when a protection circuit engages. This will help protect your investment because it shows early signs of misconfiguration. A short circuit or too low of an impedance is detected at the speaker connections can lead to less optimal performance. The amplifier automatically turns off if this occurs. This feature is often missing from other amplifiers in this price range.

Tech Specs:

  • 4 ohms RMS: 75 watts x 4 channels
  • 2 ohms RMS: 100 watts x 4 channels
  • Bridged, 4 ohms: 200 watts x 2 channels
  • Number of channels: 4-Channel
  • Load impedance capability: 4 ohms
  • Amp class: D class
  • Max RMS power output: 400 W
  • Total max power: N/A
  • Bass boost on sub channel: 0-18 dB @ 45 Hz
These amplifiers are designed for compact systems, and therefore make them a good fit for motorcycles, ATVs, and electric vehicles. They will not require a lot of strain on the vehicle electrical system. If you are looking for similar amplifiers, check out our motorcycle amplifier reviews.
These amps are very efficient and are bolstered by the Boosted Rail Technology (BRT). The sleek and ultra compact design is capable of generating 300 Watts of power.
This amplifier is only about the size of your hand, so if you’re looking for a compact design, you found it.
The amplifier features signal sensors when it is receiving power, so there is no need to run turn-on lead back to the receiver. This will make installation much easier.
This amp also comes with an extruded aluminum heat sink that combines with the manufacturer’s heat management technology that ensures your songs keep playing without fear of overheating and going bust even if you are playing it extremely loud. Note: We do not guarantee a friendly result from the neighbors.


Tech Specs

  • 4 ohms RMS: 75 watts x 4 channels
  • 2 ohms RMS: 100 watts x 4 channels
  • Bridged, 4 ohms RMS: 200 watts x 2 channels.
  • Number of channels: 4-Channel
  • Load impedance capability: 4 ohms
  • Amp class: D class
  • Max RMS power output: 400 W
  • Total max power : N/A
  • Bass boost on sub channel: 0-18 dB @ 45 Hz


A key feature of this amp is that is comes equipped with an Ultra Fi MOSFETS circuit that does not only maximize power efficiency, but it also improves the sound quality as well.
Additionally, this amp comes with LED illumination that does not only add to the overall aura and quality of the amp, but it’s also just pretty awesome.
There is a green LED indicator when the amp is on and running according to plan. There is also a red LED indicator that represents a sensor picking up a short circuit or irregularity somewhere. This will help you make sure your components don’t get fried in the installation process. Having this LED reduces the chances that you will face malfunction or overheating and damaging the transistors. If you’re not a pro, this is a good feature to have for your amplifier and your wallet.
Additionally, this amp is equipped with heavy aluminum alloy heat sink that absorbs the heat thus contributing to the longevity of your investment as well. There is near complete protection for this amp as it has a 3 way protection circuitry including the thermal overload as well as the speaker short circuitry protection.

Tech Specs

  • 4 ohms RMS: 200 watts x 4 channel
  • 2 ohms RMS: 400 watts x 4 channel
  • Bridged, 4 ohms: 800 watts x 2 channel
  • Number of channels : 4-Channel
  • Load impedance capability : 4 ohms
  • Amp class : AB class
  • Total max power : 1600 W
  • Bass boost on sub channel : 0-10 dB @ 45 Hz
This amp is a top quality amp that is very powerful. Planet Audio is not as popular as the more well known brands, but we think that this amp gives you great quality for the price.
The amp is very rugged and as such is quite scratch resistant. If you are going to be installing this in a foot well or in a trunk, the outer casing will help protect your investment.

I like the fact that the Planet Audio AC2400.4 Anarachy uses two groups of transistors that as a result if widely considered as being the most compatible as well as best compromise of the two classes put together.

Additionally, the pure class ‘A’ amplifier generates an enormous amount of current that flows through its output transistors with no audio signal. Whilst the pure class ‘B’ amplifier does not have any current flowing through its outputs with an audio signal. Therefore, this will actually eliminate basically all the crossover distortion that is possible with class ‘B’ amplifiers.
A class A/B amplifier combined is more efficient than a class ‘A’ but without the possible distortion that is normally experienced with a pure class ‘B’.
This amplifier goes for a very affordable price, and as such is a very good value for money that is sure to be a well-made long term investment.

Tech Specs

  • 2 ohms RMS: 420 watts x 4 channel.
  • Bridged, 4 ohms RMS: 840 watts x 2 channel.
  • Number of channels: 4-Channel
  • Load impedance capability : 4 ohms
  • Amp class: AB class
  • Max RMS power output: 1680 W
  • Total max power: 2400 W
  • Bass boost on sub channel: 0-18 dB @
 This Amp is a sturdy and high performing 4 channel amplifier that has high-grade parts. It does a fantastic job at heat management while also providing high current flow. This continuously delivers stable performance in almost any type of situation.
If you are looking for bright blinking lights or meters or any of that showmanship, this is not the right amplifier for that. If you are looking for something rugged that will stand the test of time, this is the right amplifier for that.
This product gives you a rugged MOSFET power supply inside.

I can also safely say that this amp is really powerful and this definitely represents good value for your hard-earned dollar. You can torture this amplifier and it will still take care of you.

Tech Specs

  • Ultra Compact MOSFET Full-Range 4-Channel Class D Car Amplifier
  • RMS Power @ 2 Ohms: 140 Watts x 4 Channels (14.4v)
  • RMS Power @ 4 Ohms: 100 Watts x 4 Channels (14.4v)
  • Crossover Controls: HPF / Full-Range / LPF | Frequency Response: 10Hz – 40kHz
  • Hi-Level Input Connections: Yes | 8 Gauge Power and Ground Input Terminals


Hopefully, this overview of what we think the best 4 channel amplifiers on the market was helpful towards your buying decision. If you are looking to learn more about car audio, we have a lot of resources available to you. If you want to learn more about 4 channel amplifiers and why they’re awesome, check out this complete guide.