Top 10 Best 4-Channel Car Amplifier On The Market 2022 Reviews

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If you are looking for loud, solid music, then an amplifier is a must. Amplifiers simply bring life to music. A 4-channel amplifier enables you to have better sound quality while increasing power to your subwoofer and speakers.

But, there are so many to choose from, and which is the Best 4-Channel Car Amplifier. It’s a difficult choice, so, we decided to compile a list of best 4-channel amplifiers you can choose from. Although they slightly differ from one another, they are all the best of the best that you’ll find anywhere!

If you want great sound, you need more than you got…

Being compact on the whole, external amplifiers will easily fit into your car because they don’t take up much space. And while most car stereo systems come with an internal amp, they are usually very basic and don’t produce the optimum sound quality you’re looking for.

Best 4-Channel Car Amplifier

So, if you have a need for quality sounds with enhanced bass, then you should invest in a proper amplifier.

This buying guide helps you select the most suitable 4-channel car amplifier for your car.

What’s to expect?

4 channel amps use a single power supply to provide a higher output voltage, stepped-up from 12V, to drive your speakers with more power than is possible with limited 12V factory systems.

You needn’t be an audiophile to love good sound production, especially from your favorite tracks, and as such having a good car sound system is a luxury you should go the extra mile to have.

You have probably looked into replacing your car’s factory speakers or have gotten around installing a subwoofer to improve the overall sound.

Let’s complement your efforts and complete your dream setup, giving your sound its last needed boost with the perfect car amplifier. So, buckle up while we go through a list of the best currently on the market to pick the perfect fit for you.

Top 10 Best 4-Channel Car Amplifier For The Money 2022 Reviews

NameMaximum WattageDimensionsRating
Maximum Wattage
600 watts
12 x 19.3 x 5.8 inches
Maximum Wattage
1200 watts
11 x 13.3 x 4.9 inches
Maximum Wattage
400 watts
7.5 x 14.4 x 4 inches
Maximum Wattage
600 watts
5.9 x 6.7 x 3.1 inches
Maximum Wattage
200 watts
9.1 x 13 x 4.3 inches
Maximum Wattage
2400 watts
9.5 x 17 x 2.2 inches
Maximum Wattage
280 watts
9.5 x 12 x 4 inches
Maximum Wattage
180 watts
7.5 x 9.2 x 3.2 inches
Maximum Wattage
300 watts
6 x 9 x 3.4 inches
Maximum Wattage
400 watts
6.8 x 14.8 x 3.2 inches
Now that we’ve covered the basics, let’s move on to the more extensive reviews…

1 Rockford Fosgate P600X4 Punch

The Rockford Fosgate P600X4 is a 4-channel amplifier that produces 150 Watts into all your four channels at 2 ohms of resistance. The Rockford Fosgate company (founded 1973) has a long history of making and selling the best. And this car amplifier isn’t short of that!

What’s more… 

The Punch P600X4 is as a bridgeable car amplifier that is perfect for a 3-way system or a 4-way full-range system having a front stage with subwoofers on the rear channels. This means it can be combined to give you even bigger output!

This amplifier is equipped with a high-level auto turn-on output which makes setting it up a lot easier. Once the voltage runs through, it turns on automatically. It, however, also has an automatic short circuit so you won’t burn it up by accident.

The best part…

It never heats up to very high temperatures because of its custom-built “aluminum heat sink”. It features an Optional remote Punch Level Control (PLC2) and comes with an input clip indicator.

So, it’s sure has enough power to blast your car music with lots of heavy bass!

Rockford Fosgate P600X4 Punch
Our rating:4.1 out of 5 stars (4.1 / 5)

  • Auto turn-on circuit enables easier, quicker setup.
  • Allows for bridging with other systems for bigger output.
  • Short circuit protection against overpower.
  • Features an anti-heat cast aluminum heatsink.
  • Not great for use with multiple woofers.

2 Pioneer GM-D8604 Class FD

The Pioneer GM-D8604 makes an excellent car stereo component that is pretty much spot on, helping you pump some big sound out of your front and rear car stereo speakers. And, at 1200 watts max power, it probably does a lot more than you might ever need it to.

It has a compact design so will fit anywhere you decide to place it. The Continuous Power Output (1W, ≤ 1% THD+N) = 125 W x 4; Continuous Power Output (4W, ≤ 1% THD+N) = 100 W x 4.

The best part…

You can easily pair on extra speakers or a subwoofer as it is completely bridgeable. It is extremely efficient and versatile and gives you high-quality sound output.

Pioneer GM-D8604 Class FD
Our rating:4.1 out of 5 stars (4.1 / 5)

  • It is designed to give continuous power output.
  • High wattage (1200 watts)
  • Its applications are versatile as it is completely bridgeable.
  • Its runs hot after prolonged use.

3 MTX Audio THUNDER75.4 Thunder Series

The MTX Audio THUNDER75.4 brings a special proposition to the table. You can mount it!

Manufactured with class A/B topology, you are sure to get a rugged product that gives you wonderful overall sound. It features a flexible amplifier that works fine on just about every different type of car stereo system.

Even better…

It is 2-ohm stable. Its also has an aluminum heatsink that ensures the product never overheats while its automatic triple circuit protection system makes sure it never burns out.

Even at a maximum wattage of 400, you get power and control for any speaker as it is a universal fit.

That’s not all…

The terminal block of the THUNDER75.4 uses set screw type connectors for both speakers and power/ground to make it easy to make solid connections so no wire falls out. All installation parts are included.

MTX Audio THUNDER75.4 Thunder Series
Our rating:4.4 out of 5 stars (4.4 / 5)

  • Features a unique mountable design.
  • Class A/B topology to give you the best sound output.
  • Features an extruded anti-heat aluminum heatsink.
  • Triple circuit protection to prevent burning out.
  • Compact design.
  • Congested panel.
  • It is known to interfere with radio frequencies.

4 Kenwood KAC-M3004 Compact

The Kenwood KAC-M3004 Compact will power up the music in your vehicle with 50 watts RMS per channel. It gives you a maximum wattage of 600 which is obviously a lot more than the other sounds that may occur around you.

What do I get with this product…

It is portable. This fit gives you the freedom to use it with smaller automobiles such as motorbikes and ATVs (All Terrain Vehicles).

Not to worry, The KAC-M3004 uses a conformal coated main PCB (Printed Circuit Boards) which offer extra layers of protection to protect the amplifier from damage by making it moisture-proof.

Hence, you could even fit it on a boat or a yacht! It internal features are also covered to make it dirt-proof.

What’s more…

It has automatic signal sensing turn-on and can easily power more than one subwoofer. So, you can easily power up anytime, anywhere with the KAC-M3004!

Kenwood KAC-M3004 Compact
Our rating:4.6 out of 5 stars (4.6 / 5)

  • Portable design.
  • Decent wattage for its compact size.
  • Can be used on various land and water vehicles.
  • Features signal sensing turn-on.
  • Moisture-proof.
  • Dirt-proof.
  • Runs hot after prolonged use.

5 Alpine MRV-F300

The Alpine MRV-F300 is a medium sized car amplifier that delivers 75W RMS X 4 (2Ω, 14.4V, ≤1% THD+N) or it can be set to 50W RMS X 4 (4Ω, 14.4V, ≤1% THD+N). At this 200 watts maximum output, it is just right for most peoples listening pleasure.

Even better…

It uses a technology called Enhanced Shutdown Performance, which rolls back the output a bit when the amp overheats from playing for long periods.

Instead of shutting down it continues playing your music at a slightly lower output until it cools enough to return to full power. No worries indeed about burning out.

There’s more…

Its high and low pass filters put you in command of the frequencies that reach your speakers equalizing what you want to best suit you. There’s also a bass boost that lets you apply some extra low end to your sub-woofers if needed.

This amp fits with any vehicle and has automatic signal sensing turn-on. The end-piece terminal features covers that can be snapped in and out without needing to use tools.

Alpine MRV-F300
Our rating:4.6 out of 5 stars (4.6 / 5)

  • Automatic overheat protection function.
  • The music output helps protect your ears by offering you a low maximum of 200 watts.
  • Equalizer function.
  • Signal sensing turn on.
  • It features a blue light on its cover which can be annoying especially when you drive with it at night.
  • No RCA outputs.
  • The system generates a slight amount of noise.

6 BOSS Audio PH4.600 Phantom

The BOSS Audio is another 4-channel car amplifier. But this one is offering you a massive 2400 watt of output! This sure sounds like it that rings party bells.

This amp can work on 2 and 4 ohms and it can be bridged to give you multiple connections. It also gives you great sound (class A/B) and has a thermal overload, that covers all components of the amp.

Its speaker’s short protection and remote subwoofer level are thermally protected against overload, so you are all the way safe with this product.

What’s new…

Aside from the high sounds (MOSFET technology), you get a very wide range of frequency response (from 9 to 50,000 Hz). You likewise get Total Harmonic Distortion (THD) of RMS Output: 0.01%, which functions as a noise canceller.

The best part…

It has a soft turn-on circuit and has built-in low and high-pass variable crossovers at 18dB bass boost!

Eardrums, anyone?
BOSS Audio PH4.600 Phantom
Our rating:3.6 out of 5 stars (3.6 / 5)

  • MOSFET technology powered high wattage output.
  • Thermal overload against circuit, speaker and subwoofer burn-out.
  • Allows for bridging to increase speaker and subwoofer count.
  • Wide frequency response range (from 9 to 50,000 Hz).
  • Noise cancellation.
  • Loud but poor sound quality.
  • Heats up pretty quickly.

7 JL Audio JX400/4D

Adding the JL Audio JX400/4D to your stereo means you get an RMS Power Rating of 14.4V (4 ohms: 70 watts x 4). That’s a total of 280 watts of improved sound and feel of your music.

This 4-channel amp equipped with NexD amplifier technology ensures that you enjoy your music without straining the car’s electrical system.

There’s more…

It has a charming LED light and removable cover. The blue accent lighting added by the LED clip lights really improve the amp’s looks and adds a cool feel to the sounds you’re listening to.

Its removable cover hides the amplifiers controls as an aesthetic feature, and to provide tamper resistance.

Even better…

The JL Audio JX400/4D has a highly efficient filter configuration. This provides a 12dB/octave filter that’s configured to function as either a high or low-pass filter.

JL Audio JX400/4D
Our rating:3.6 out of 5 stars (3.6 / 5)

  • Attractive appearance.
  • Tamper resistant cover.
  • Blue LED lights to provide an immersive listening experience.
  • Its NexD amplifier technology is quite religious about keeping your car’s electronics safe.
  • It has a bit of feed noise.
  • Several customers complain its channels cut out with time.

8 Alpine KTP-445U

The Alpine KTP-445U definitely has a promise for you.

What promise is this?

At 180 watts total delivery value, it promises to offer you proper production while keeping your ears working properly for longer.

What’s more…

This compact model car audio amplifier will surprises you with very good sounds and allows for under-the-seat mounting without overheating.

It puts out a very adequate 45 watts of power per channel (x4 @ 4Ω) and has one the best signal to noise ratios. You can also configure it to filter out a wide variety of frequencies. This product comes with a wiring harness for both RCA and auto-sensing speaker connections.

Alpine KTP-445U
Our rating:4.5 out of 5 stars (4.5 / 5)

  • Compact class D amplifier
  • Offers you a maximum sound output that you can actually listen to (180 watts).
  • It has versatile frequency filtering.
  • RCA & automatic-sensing speaker-level connections.
  • Great signal to noise ratio.
  • It does not feature a low pass crossover.
  • Instruction manual needs improvement as it doesn’t detail any of the features or setup of the product.

9 Rockford Fosgate PBR300X4 Punch

The Rockford Fosgate PBR300X4 Punch is a small 4-channel car amplifier. But do not be undermined by its size.

What do I get with this product?

You should know that it’s not just for cars and trucks, it will work great on ATV’s, motorcycles and RV’s as well, because it does not require much electrical current to power it.

It is also small enough (6 x 9 x 3.4 inches) to be mounted under the dash or a seat without causing any problems at. It offers you a very decent 75 watts per channel at 4-ohms of resistance despite this small size.

There’s more…

It has led illuminating lights that are blue when the unit is turned on and red if a short circuit or low impedance is detected at the speaker connections or the amplifiers internal components become too hot.

If this occurs due to prolonged use, it’s auto protection shuts down the system for some time to cool it down. This, however, is avoidable if you mount the PBR300X4 in an area with sufficient ventilation.

It is therefore recommended to be mounted under the seat of the vehicle, if that is where you want it, with at least 1 inch of air gap around the amplifier’s heatsink.

Even better…

The Fosgate PBR300X4 fits with any car speaker system and is manufactured with superior components used by aerospace, automotive, and cellular phone manufacturers.

The unique features to this product include NOMAD, which is an analog computer that works in “real time” to protects your amplifier from shorting your speaker wires, and dangerously low speaker impedances. Another feature is MEHSA3 (Maximum Efficiency Heat Sink Application – Gen. 3).

The MEHSA3 (patent-pending) utilizes a multi-layer insulated metal substrate operating with minimal thermal resistance that spreads heat both downward & outward to quickly dissipate it from each device across the heatsink and keep it cooler for longer.

And, that’s not all…

The Punch’s onboard equalization circuit also helps correct acoustical deficiencies (noise cancellation). And, has selectable bass and treble boost frequencies.

You sure get a lot from this mini monster!

Rockford Fosgate PBR300X4 Punch
Our rating:4.2 out of 5 stars (4.2 / 5)

  • The product is extremely compact and can be placed under your seat.
  • Offers the opportunity for use with different automobiles. (RV’s, ATV’s, Motorcycles).
  • Excellent Noise cancellation.
  • It goes hot very quickly despite its thermal dissipation system.

10 Kenwood 1177524 Compact

The Kenwood 1177524 Compact is very unique for a number of reasons.

So, what does it bring to the table?

It is Bluetooth compatible, so you can sync up your mobile phones and start grooving!

It’s medium size but gives out some quality sound power of up to 400w. It puts out a very respectable 45 Watts per channel power when hooked up to 4 speakers (4-ohms) and has a coated PC board that helps make it moisture resistant. It also features a signal sensing turn-on switch.

There’s more…

This compact amplifier not only works nicely in vehicles, but it also works just as well in boats, RV’s, and on ATV’s and motorcycles too. It’s compact, moisture resistance perfectly allows for these multiple uses.

Not just that. It only requires very little DC current to run properly. Nice, don’t you think?

The best part…

In the pack is a waterproof remote control.

Kenwood 1177524 Compact
Our rating:4.3 out of 5 stars (4.3 / 5)

  • Its Bluetooth compatibility is a very useful feature.
  • Moisture resistant PC board and waterproof remote are a big plus.
  • Can be used with several types of land and water vehicles.
  • Requires lower DCs to run.
  • Portable design.
  • Decent wattage for its compact size.
  • Features signal sensing turn-on switch.
  • Its Bluetooth has a blue background light that can be bothersome while driving especially at night.

Best 4-Channel Car Amplifier Buying Guide

Buying an amplifier to boost your vehicles sound output is a great decision. Why? Because everyone loves to listen to good music. However, there are a few things you should note before making your final decision. And. we’ve listed them for you:


You need to make sure that the amp you purchase is compatible with the ohm load that you intend wiring it up to. If you overload the amp, you’ll kill it.

best 4 channel car amplifier

More Power Is Better

You should consider the RMS of your speakers and subwoofers. Increased amp power will always add richness and depth to your music without producing distortion.

Quality And Heat Dissipation Ability

The quality of the materials used goes a long way in deciding what your amplifier can and can not do. Amps without a proper heat dissipation system easily burn out or power down till it cools off, ruining your experience.

Product Size

Always check the amplifiers dimensions to ensure it fits where you want to install it in your car.

Sound Quality

Loud is usually not a match to proper sound output. You might never use the “loud” ever anyway. It is more important to check for features like sound filters, frequency response, Total Harmonic Distortion (THD), sound to noise ratio and possible noise cancellation features.

These give you a pointer as to what sound quality to expect your car’s amp to produce.


Bridging offers you an opportunity to use two channels together in one load. The purpose of this is so that every single channel produces more power. As an example, if you need a single channel to have an output of 300 watts, you can bridge 100 watts per channel. To bridge an amp, however, you will need the speakers to have double the impedance of the minimum rating load.


Easy to install is usually better. This also saves you money because you don’t have to employ a technician to install your amplifier for you. Also, preferably buy a 4-channel car amplifier that has a detailed installation guide and comes with all the required parts for a complete installation.

So, What’s The Best 4-Channel Car Amplifier?

Getting th best results from most things is usually not an easy task. It is a goal that everyone aspires to, but proves elusive at times. However, we took time out to make you this detailed guide to help you make a positive, easy choice from the top ten on the market.

Top 10 sure means a lot, given the number of products out there. But we have used the buying guide to make a careful pick that covers all the important details: product quality and proper sound production among other basic factors.

And there has to be a winner, and for this round-up, it’s the…

Kenwood KAC-M3004

It utilizes a special MOSFET technology to operate efficiently and with little heat production, has a variable equalizer that allows you to tweak your sound to your personal preferences, works with all car types and more, including boats, RVs and ATVs.

Even better, at a compact size that fits practically anywhere, it still manages to give you a decent 600 watts and is moisture and dirt-proof.

It is our top pick because it also bridges effortlessly and has automatic sensing power on.

What are you waiting for? Amp up your driving experience with any one of these super vehicle amplifiers!

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