10 Best 4 Channel Amp 2021 Reviews


Unlike the earlier days, cars now come with their own factory speakers and radio system pre-installed, which might be good in one’s opinion. However, these factory radio systems and speakers don’t usually sound great, so most people prefer to install their own set of speakers.

Well, that can be an expensive approach, so what else you can do to improve the quality of your vehicle’s sound system. Well, pairing a good quality amplifier can really make a huge difference, so we have picked some of the best 4 channel amp options from the market for you. But, make sure you keep in mind a few things before buying such as:

  • Max Power Output: If you believe that your vehicle’s speakers are just not loud and sound very mushy, an amplifier can simply elevate it for you. For that, you can check the max power output of the amplifier as the more power it can deliver, the better will be the sound quality.
  • Impedance: To make sure you are buying the right amplifier for your car, you must know what type of speakers are installed in there. Most of the cars usually come with 4 Ohm speakers which almost any amplifier can handle. However, if you also want to pair a subwoofer system alongside, they are usually 2 Ohm units, so make sure the amp supports 2 Ohm impedance as well.
  • Frequency Response: Yet another thing that can help you pick a good amplifier for your vehicle’s sound system is the frequency response. If the amplifier covers a wider range of frequencies, then it’ll be able to serve you with a larger soundstage covering all the high and low-end sounds clearly.

If you want to know more about 4 channel amplifiers, we have already included a detailed buying guide for you in this article. So, in case you are buying such a product for the first time, or after a long time, reading the “Buying Guide” might be helpful for you to pick the best 4 channel amp from the list. Until then, let’s take a look at the list and quickly check out the features of each and every amp.

Best 4 Channel Amp 2021

Best 4 Channel Amp Reviews

1. Pyle Hydra Marine Amplifier

Pyle Hydra Marine Amplifier

Starting with the first 4 channel amp on this list, you must consider checking out the Pyle Hydra Marine Amplifier if you are essentially looking for it to install on a boat or yacht.

The amp is not at all expensive and comes built with all high-grade materials, so there are no complaints regarding the build quality. To help out the users install it easily with their speaker setups, it comes with easy-to-use RCA stereo connectors at the back as well. If your receiver doesn’t allow for RCA connections, you can connect them using the high-level terminal units as well.

Speaking of its performance, this 4 channel amp is quite powerful and delivers around 100 Watts of power per channel, hence, the max power output touches 400 Watts. Moreover, with the help of dual-adjustable input gain levels, you can easily use 4 ohm and 8-ohm speakers with this amp. Apart from that, this amp is surely built for boats as it comes with an IP01 waterproof rating as well. If you are concerned about the warranty, Pyle Hydra is quite a reputed brand and offers a 1-year warranty for this 4 channel amp.

Best Features:

  • Max Power output is 400 Watts
  • Delivers 100 Watts of power per channel at 4 ohm
  • Has IP01 Waterproof rating
  • Comes with a 1-year warranty

Pros:

  • Superb build quality
  • Compact size
  • Brilliant sound quality

Cons:

  • Does not support 2-ohm speakers

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2. Taramps Amplifier

Taramps Amplifier

One of the best choices that you can make to purchase is this 4 channel amp offered by Taramp as it’s clearly one of the most popular brands out there that sell such kind of high-quality equipment.

The installation process for this 4 channel amp is quite simple, thanks to the given RCA stereo ports, it becomes a lot easier to connect and fit into any car’s audio system. Apart from that, the compact size of this amp allows you to easily install it and keep it hidden. Coming over to its performance, the total power output of the amp is about 1600 Watts which makes it one of the most powerful options in this list.

All 4 channels share about 400 Watts per channel. It’s capable of delivering up to 400W RMS output (100W x 4) at 2 ohm impedance, and 252W RMS output (62W x 4) at 4 ohm impedance, which is quite decent. In addition, the frequency response offered by the amp is 18Hz to 30kHz, which makes a huge difference between the sound quality, and you’ll notice the change right after installation. Talking about the warranty, Taramp offers a 1-year warranty for this 4 channel amp.

Best Features:

  • Max Power output is 1600 Watts
  • Delivers 100 Watts RMS power per channel at 2 ohm
  • Delivers 62 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • Highly compact
  • Affordable pricing
  • Power output is good

Cons:

  • Not ideal for 8-ohm speakers

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3. Planet Car Amplifier

Planet Car Amplifier

Speaking of amplifiers, one should not miss out to check out the Planet Audio PL2400.4 4 Channel Car Amplifier as it’s one of the most premium and powerful options available on this list.

The brand is absolutely one of the best, so is this 4 channel amp. You will be amazed to know that this 4 channel amp can draw up to 2400 Watts max power output which can let you experience a very crisp and large soundstage, right from your car’s speakers. When you invest in such a powerful amplifier, you should already plan to buy a new pair of speakers for your car as the factory ones are not going to do pure justice to this amplifier’s performance.

With a 2 ohm setup, it draws about 600W max power per channel, while the max power output at 4 ohm touches about 300W for each channel which is quite good. Apart from that, you get plenty of useful adjustment features like Low and High-Level Inputs, Variable Filter, Variable Bass Boost, etc. Since Planet Audio is one of the best brands out there, it offers an amazing 6-year warranty for this 4 channel amp.

Best Features:

  • Max Power output is 2400 Watts
  • Delivers 600 Watts of power per channel at 2 ohm
  • Delivers 300 Watts of power per channel at 4 ohm
  • Comes with a 6-year warranty

Pros:

  • Brilliant power output
  • Amazing performance
  • Comes with plenty of useful adjustment features

Cons:

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4. JBL Amplifier

JBL Amplifier

Well, if you are an audiophile, you must have heard about JBL which gets all of its high-grade products manufactured from Harman Kardon.

Speaking of this 4 channel amp from JBL, it’s a little bit on the expensive side as compared to the other options, but the quality of product you get makes it truly worth it. The design and the construction of the amp are truly solid. In fact, the size is pretty compact as well.

If we talk about its performance, this 4 channel amp works for both 4 ohm as well as 2 ohm speakers setups. Since the max power output of this amp is 435 Watts, it offers 60W RMS X 4 at 4-Ohm impedance and 85W RMS X 4 at 2-Ohm impedance. Apart from that, it’s designed very well and comes with a dedicated cast-aluminum heatsink to keep it cool while your speakers use their full potential. Coming from JBL, you can definitely expect it to have a 1-year warranty.

Best Features:

  • Max Power output is 435 Watts
  • Delivers 85 Watts RMS power per channel at 2 ohm
  • Delivers 60 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • High build quality
  • Small size
  • Easy to use and install

Cons:

  • Power output could be better

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5. Rockville Amplifier

Rockville Amplifier

Rockville is yet another good brand choice to pick if you are essentially looking out for a premium 4 channel amp for your car as it’s one of the most trusted and customer-friendly brands out there.

If we speak about this Rockville RVF-2 4 channel amp, the peak power offered by this amplifier is about 1200 Watts, which is quite impressive and justifies the pricing as well. That being said, this amp can provide up to 75W RMS output at 2 ohms per channel, and up to 55W per channel at 4 ohms. On 4 ohm bridged connections, you can receive up to 150W on both channels, at 4 ohms.

Thus, the performance of the amp is absolutely top-notch and it’s well capable to deliver a fantastic sound quality. On top of that, it also features a fully adjustable 12dB bass equalizer, low pass filter, and high pass filter as well. In addition, it also comes with a 1-year warranty as well.

Best Features:

  • Max Power output is 1200 Watts
  • Delivers 75 Watts RMS power per channel at 2 ohm
  • Delivers 55 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • Offers crisp and loud sound output
  • Comes with a 12 dB bass equalizer
  • Good build quality

Cons:

  • Does not support 8 ohm speakers

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6. Blaupunkt Amplifier

Blaupunkt Amplifier

Coming up next, if you are looking out for a powerful 4 channel amp for your car, Blaupunkt has one of the best options that you can check out.

The reason why it’s one of the best options to consider is because of its compact size. Due to that, the installation process of this 4 channel becomes quite easy as it does not require much space in your car. If we talk about its performance, there are a max of 4 channels on this amp and it can deliver a max power output of 1600 Watts distributed over 4 channels.

Since it supports both 4 ohm and 2 ohm speakers, the RMS power output at 4 ohm is 55W, and 79W at 2 ohm impedance, per channel. Yet another good feature of this 4 channel amp is that it offers a wide frequency response of 10Hz – 30kHz which highly improves the sound quality of your car’s factory speakers. Along with the amplifier, you will also receive a warranty card stating its 1-year warranty.

Best Features:

  • Max Power output is 1600 Watts
  • Delivers 79 Watts RMS power per channel at 2 ohm
  • Delivers 55 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • Compact size
  • Easy to install
  • Frequency response is fantastic

Cons:

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7. Rockford Amplifier

Rockford Amplifier

For those of you who are really dedicated to improving the sound system in your car and want to install a premium and powerful amplifier along with a new pair of speakers, Rockford is the best brand to pick an amp for your car in this case.

We personally like this Rockford Fosgate R2-500X4 amplifier as it’s one of the most powerful amplifiers on this list. As its name suggests, the max power output of this amplifier is about 2000 Watts which clearly outshines most other options on this list. Thanks to the Class D technology, this amp is able to distribute the power over all channels equally and provides an amazing output through the speakers.

You can choose to use this amp with any configurations as it offers 75 Watts x 4 power output at 4 ohms and 155 Watts x 4 power output at 2 ohms. On the other hand, if you opt to set up a bridged connection, it can deliver up to 250 Watts x 2 power output at 4 ohms. Speaking of other features, it also features fully adjustable 12 dB/octave high and low pass Butterworth crossovers as well. In case you are concerned about the warranty, it does come with a 1-year warranty also.

Best Features:

  • Max Power output is 2000 Watts
  • Delivers 155 Watts RMS power per channel at 2 ohm
  • Delivers 75 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • Premium build quality
  • Power delivery is good
  • Great for 2 ohm and 4 ohm setups

Cons:

  • Not compatible with 8 ohm

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8. Pioneer Amplifier

Pioneer Amplifier

Well, here’s another premium option that you can consider picking as Pioneer is one of the most reputed brands and best-known for selling high-quality equipment for sound systems.

This amp is a perfect choice for you if you are looking for an amplifier for your 4-ohm speaker setup. Moreover, it’s also 2-ohm stable so running up them is not a problem at all either. Since the max power output of the amp is 1000 Watts, you can expect up to 125 Watts on each channel at 4 ohm impedance, and up to 250 Watts on each channel at 2 ohm impedance.

So, in both cases, you will get to experience a really loud and clear output from your speakers which is why this amp is liked and appreciated among the community. Apart from that, you also get all the necessary features like LPF, HPF, Gain control, bass boost, etc. which makes this amp one of the most user-friendly and advanced ones. Apart from that, Pioneer also offers a 1-year warranty for this amplifier.

Best Features:

  • Max Power output is 1000 Watts
  • Delivers 250 Watts RMS power per channel at 2 ohm
  • Delivers 125 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • Highly compact
  • Has adjustable LPF and HPF
  • In-build bass boost

Cons:

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9. Alpine Amplifier

Alpine Amplifier

Next up, we have another premium amplifier option coming from Alpine which is known to make one of the best-quality amplifiers, not only in terms of performance but also in terms of build quality as well.

The Alpine S-A32F S Series 4 Channel Digital Amplifier is a great pick for those who are using a 2 ohm speaker setup in their cars as this amplifier is particularly designed for that. Yes, it can perform on 4 ohm impedance as well, but you will have to compromise a little on the power in that case. The max power offered by this amp is about 640 Watts, which is divided into 80 Watts RMS per channel at 2 ohm impedance, and 55 Watts RMS per channel at 4 ohm impedance.

Thus, the sound quality that you can get out of this amplifier will be amazing in both cases, but for 2 ohm setups, it’ll just blow your mind. Apart from that, the amp also features variable low-pass filters and high-pass filters along with selectable bass boost, so listening to your favorite quality of music becomes so much easier if you have this amplifier installed in your car. On top of that, you will also get a 1-year warranty for this amp which makes it a perfect option to pick.

Best Features:

  • Max Power output is 640 Watts
  • Delivers 80 Watts RMS power per channel at 2 ohm
  • Delivers 55 Watts RMS power per channel at 4 ohm
  • Comes with a 1-year warranty

Pros:

  • Minimal and elegant design
  • Easy installation
  • Variable low-pass filter and high-pass filters

Cons:

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10. Doulk Amplifier

Doulk Amplifier

Lastly, we would like to discuss the 4 channel amp from Douk Audio which is a perfect option for people who are not looking to spend much and just need a compact and budget-friendly amplifier to install in their car.

Being a highly versatile amplifier, it allows you to use one group of RCA connectors to use for audio output as well. On top of that, one of the most interesting features about this amp is that it features Bluetooth 5.0, so you can directly connect your mobile, laptop, tablets, directly with the amp and use it to play your favorite music in your car.

Speaking of its performance, the max power output that it offers is just about 200 Watts which is comparatively less than other options on this list. However, since it offers 50 Watts max power output per channel at 4 ohms, it can be great for those who want to upgrade their sound system in their old cars. Moreover, the compact size of this amp is yet another attractive feature that allows you to install it anywhere in the car easily. In addition, it also comes with a 1-year warranty.

Best Features:

  • Max Power output is 200 Watts
  • Delivers 50 Watts RMS power per channel at 4 ohm
  • Built-in Bluetooth 5.0
  • Comes with a 1-year warranty

Pros:

  • Extremely compact
  • Highly affordable
  • Offers decent sound quality

Cons:

  • Not compatible with 2 ohm speakers

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Buying Guide for the Best 4 Channel Amp

Whether you are looking forward to installing a new sound system in your car, or maybe just want to improve the quality of the factory system, an amplifier is much needed! Since cars usually come with two front speakers and two rear speakers, a 4 channel amp is going to be the best choice for you as you can comfortably connect all your car’s speakers with it, including the subwoofers as well, in case you have one!

That being said, we have already presented you with some of the best 4 channel amp options in the list mentioned above, so you can grab whichever option you like. However, if you are feeling confused to pick the right option, you must read this section until the end. In this simple buying guide, we will be explaining to you the main factors that you all should consider before buying a new 4 channel amp for your car. So, without wasting any time, let’s jump on to it.

Form Factor

First of all, whenever you pick an amplifier to install in your car, you must remember that cars have pretty limited space. That said, the amplifier that you choose should be a compact one so that you can easily place it in your car.

Most people prefer putting the amplifier under the seat or behind the dash as it’s the best place and the amp stays almost unnoticeable and even the wiring can be hidden nicely. If you go for the bulkier models, make sure your car has an ample amount of space to place it well. Otherwise, there’s always a risk of getting your amplifier damaged if it’s not placed properly in the car.

Max Power Output

Well, the major reason why people choose to install amplifiers is that the factory speakers are not able to provide as loud output as they like. So, if you are into loud music as well, then you should not miss out to check the max power output offered by the amplifier.

Although even a 100 Watts change in the output after installing the amplifier brings quite a noticeable change in the speaker’s performance. But, it’s always good to keep some headroom for extra comfort. That said, the more powerful amplifiers having 1000W, 2000W, etc., are quite good and provide a much better sound quality as well as a wider soundstage.

Impedance

While buying a new amp, one of the most important things to check alongside the power output is impedance. Most amplifiers offer different power output according to the impedance of the speakers that you are using. For instance, if the speakers are of 2 Ohms, the amplifier will be able to draw out more power as compared to the situation when you use 4 Ohm speakers.

So, make sure to match these numbers before you invest in an amplifier and pick the one that supports your speaker system. If you are using a speaker that has an 8 Ohm impedance, connecting it to a 4 Ohm amp won’t be an ideal choice as you will need to connect it in parallel wiring. This will eventually make your 8 Ohm speaker into a 4 Ohm one, so using it up to its full potential becomes quite difficult if you don’t have the right amplifier.

Frequency Response

Yet another thing that can help you judge the quality of an amplifier is its frequency response. The factory radio systems are not generally good in terms of frequency response which is one big reason that they sound very flat.

However, an amplifier can solve it for you as most amplifier systems are able to produce a much wider range of frequencies which can make the speakers put out more details in the music. So, you must check the frequency response, as the wider range your amplifier covers, the better will be the sound quality.

Warranty

Last but not the least, as we always encourage our readers to go for reputable brands only, it’s because they offer good after-sales services. We don’t want you to be in situations where the customer service personnel always keep your call on hold.

Instead, it’s important that you should always pick your products from brands that offer decent warranties and care for their customers. Most of the 4 channel amp options that you will find in the list have at least 1-year long warranty, so it’s better to pick one from our list rather than anywhere else.

FAQs about 4 Channel Amps

1. Do amplifiers improve the sound quality?

Ans. In a way, yes, but installing an amplifier doesn’t mean that you should be expecting Beyoncé singing sitting right beside you in your car. An amplifier’s job is to enhance the signals and make them reach the speakers that a factory radio system struggles to do. So, an amplifier does not improve the quality but helps you listen to the actual highs and lows that you miss out on because of the bad quality offered by the factory radio system.

2. How many speakers can we connect to a 4 channel amp?

Ans. A single channel can obviously handle more than one speaker, so that being said, a 4 channel amp is a suitable choice for connecting up to 8 speakers. However, if you want to pull out the max power from the amp for your speakers, it’s always better to use only one speaker per channel to have the best sounding experience. When you connect more than one speaker, you will have to make the connections parallelly which will eventually affect the power output of the amp, so it’s always preferable not to use more than 4 speakers with a 4 channel amp.

3. How to find an amp suitable for a subwoofer?

Ans. That depends on the type of subwoofer you are using. Amplifiers usually have variable impedances so multiple types of speakers and subwoofers can be connected to them. However, in the case of single voice coils subwoofers, you have to be extra precise. If you have a 2-ohm SVC subwoofer, it can only be connected to a 2-ohm amplifier channel. Similarly, a 4-ohm SVC subwoofer only works well when connected to a 4-ohm channel. So. it’s always better to consult a professional before buying such equipment.

Conclusion

In this article, we have discussed almost all the best available 4 channel amplifiers that have the potential to be installed in your car and power up the sound system in a great way. That being said, we hope you have already checked out all the options and have already selected to choose one for your car. In case you are getting confused, you can go through the buying guide and take help from it to choose the best 4 channel amp for your vehicle. However, if you are still not able to decide, we have a few good personal recommendations for you that you can check out:

  • First of all, if you are on a budget, one of the best options for you to pick is Pyle Hydra Marine Amplifier Upgraded Elite Series 400 as it’s quite cheap and does not compromise on the features. It’s best for both boats and cars and even comes with an IP01 waterproof rating as well. Moreover, the max power output offered by this amp is 400 Watts which is amazing, and it also comes with a 1-year warranty.
  • On the other hand, if budget is not an issue for you, you should choose to pick the Rockford Fosgate R2-500X4 500-Watt 4-Channel Amplifier because of its power output and fantastic build quality. Apart from the brilliant power output, it also features 12 dB/octave high and low pass Butterworth crossovers, bass equalizer, and other adjustment features as well. On top of that, the 1-year warranty makes it a completely profitable deal for you.
  • If you are looking for a powerful amplifier, but don’t want to break the bank, we recommend choosing the Planet Audio PL2400.4 4 Channel Car Amplifier as it offers about 2400 Watts of power output which is amazing. Apart from that, it also offers Low and High-Level Inputs, Variable Filter, Variable Bass Boost, and comes with a 6-year warranty.

Make sure to share your thoughts in the comments section. You can also post any questions down there if you have any!



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