Best 4 Channel Amp – The Ultimate Review

Of all the upgrades you would consider having in your car’s audio system, an amplifier might be at the top of the list. For anyone who’ll be needing to set up more than one speaker or include a subwoofer and some speakers in their audio system, the best 4 Channel Amp ought to do the trick.

I know you’re probably wondering how you should go about getting the best; well this is no easy task which is why it's best that you take a look at our guide for the best car amplifier.

Now that you’ve got the buying guide at your disposal, how about we move on to take a look at the best 4 Channel amps. In addition to just giving you 10 of the best, we also do have a comparison chart. Let’s get started right away, shall we?

First of all, before we delve into looking at our listing of the top 10, how about you take a look at our top 3 recommended picks- definitely the best of the best.

Product Image

Key Features

Rockville dB45 3200 Watt/1600w RMS 4 Channel Amplifier Car Stereo Amp

Rockville dB45 3200 Watt/1600w RMS 4 Channel Amplifier Car Stereo Amp, Loud!!

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    This is a high power amplifier 
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    Best value in car audio
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    Full IC-Controlled Protection
Rockford R300X4 Prime 4-Channel Amplifier

Rockford R300X4 Prime 4-Channel Amplifier

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    Accepts High Level & RCA Level Input
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    Cast aluminum heatsink with Top Mount Controls
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    Class A/B Circuit Topology
MTX Audio THUNDER500.1 Thunder Series Car Amplifier

MTX Audio THUNDER500.1 Thunder Series Car Amplifier

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    Class D Topology
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    Selectable Bass Boost
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    Small Foot Print Design

Best 4 channel amp- 2018’s recommended picks.

Moving on to today’s main agenda, let’s commence our review with the Pioneer GM-D8604 Class FD 4-Channel Bridgeable Amplifier.

Pioneer GM-D8604 Class FD 4-Channel Bridgeable Amplifier

PIONEER GM-D8604 CLASS FD 4-CHANNEL BRIDGEABLE AMPLIFIER

The fit = 80/100

Versatility = 80/100

Performance = 80/100

The design is compact, the fit will be perfect for most vehicles and without compromising on performance. It's a bridgeable amp which means you can channel as much power as you want to power up your speakers

When it comes to excellence as far as car audio systems are concerned, pioneer just so happens to be one of the most reputed brands. If you’re looking to pump a big sound from your speakers, then the Pioneer GM-D8604 might just be the missing piece. Here’s what it’s got for you.

Compact design.

For the sake of versatility and installation options, this amp has got a really compact design. This not only renders it light but it will also offer a variety of installation options

Power handling 

Other than just coming in a compact design, its power handling is quite commendable. It has a continuous power of 100 wats on each of the 4 channels at 4 ohms and 150 watts x 4 running at 2 ohms. The peak, on the other hand, is 1200 wats.

Something else that’s worth pointing out about this amp is that it’s completely bridgeable. Wire it up properly based on your configuration and you’ll get a sound like no other.

PROS

  • 1
    Completely bridgeable for the best sound quality.
  • 2
    Compact design for the perfect fit and easy installation.
  • 3
    100w and 150w RMS at 4 ohms and 2 ohms respectively for the best audio experience

CONS

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    It may heat up when supplied with a lot of power for long

QUESTION ANSWER FAQ

Q: what is the RMS per channel?

A: the RMS is 100 watts

Q: can it be used for mids and highs?

A: yes, it can be used for both of these

Q: what are the dimensions of this amp?

A:11"Wx 2-3/8"H x 7-7/8"D

Crunch PX1000.4 Power Amplifier

crunch PX1000.4 Power Amplifier

Durability = 80/100

User friendly = 70/100

Performance = 80/100

It comes with a low levelRCA AND high level inputs, quick thermal dispersion and a built in variable electronic crossover.

Meant for anyone who’s willing to give their vehicle the best of the best, this crunch PX1000.4 is definitely going to give you a whole new experience; here’s what it’s got

A low level RCA inputs and outputs

It’s all about getting the sound as loud and clear, right? Well, to ensure that this is all you’ll be getting, this amp has got low level RCA inputs and outputs included. With the RCA jacks, setting it up won’t be that much of a hassle at all.

Besides just the low level RCA input, there is also an optional high level input.

Quick thermal dispersion technology

Yet another outstanding feature is a quick thermal dispersion technology. With the presence of a heatsink, heat build up is minimized which in turn reduces the odds of your amp getting damaged

A build in variable electronic crossover.

Within the amp is an electronic crossover which, as expected functions to isolate the high frequencies and the lows that in turn gives you an above-average musical experience.

PROS

  • 1
    Quick thermal dispersion technology for heat management
  • 2
    Comes with both high and low-level inputs
  • 3
    It’s also got a built-in variable electronic crossover

CONS

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    The only problem may be that it heats up quite a lot

QUESTION ANSWER FAQ

Q:is it okay to use a 10 gauge wire?

A:yes this should work just fine

Q:will this be ideal for a 6x8 360w max and 81w RMS speaker

A:yes, should work just fine

Q:can it pus 4 6x9 speakers?

A:yes it can

Rockville dB45 3200 Watt/1600w RMS 4 Channel Amplifier

Rockville dB45 3200 Watt/1600w RMS 4 Channel Amplifier

Performance = 80/100

User-friendly = 70/100

Durability = 80/100

It’s a class AB amp hence higher efficiency, it has an outstanding power handling as well as a circuit protection with a full controlled IC

Being a class AB amplifier, it’s performance and efficiency is outstanding as compared to either the class A and B separately. This, however, is just but a tip of the iceberg of what you’ll be getting from this amp

Power handling.

This is most probably the most striking feature about this amp. With a peak of 3200 watts, an RMS of 1600 watts power output and 800 watts CEA-2006 rating, you’ll definitely be getting the biggest value for your money.

You will also be getting MOSET circuitry on this sub that’s quite convenient for high power supply. The sub also does have both an undervoltage and overvoltage protection of 10 and 16 volts respectively.

Circuit protection

This amp also does have a full IC controlled circuit and has a peak limiter circuitry that guarantees music free of any distortions at any playback level

Also…

It’s got a 12dB/ Octave crossover that’s also got differential circuitry. It will also be coming with a low pass filter of between 50 and 250 hertz as well as a high pass filter of between 60 and 1200 hertz. The frequency response is between 10Hz-50kHz whereas the sensitivity is an outstanding 90dB

PROS

  • 1
    It’s a class AB amp hence it’s got a better efficiency
  • 2
    The 1600-watt RMS and 2300-watt peak will definitely give you a good musical experience
  • 3
    Comes with a full IC controlled circuit

CONS

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    Be careful while bridging it not to damage it.

QUESTION ANSWER FAQ

Q:can I use 0 gauge wire on this amp?

A: yes, it will work just fine

Q:what are its dimensions?

A:12x10x2 inches

Q:can this work on a 1 ohm type r?

A: yes, it can

Rockford Fosgate P400X4 Punch 4-Channel Amplifier

Rockford Fosgate P400X4 Punch 4-Channel Amplifier

Durability = 70/100

Performance = 80/100

User-friendly = 60/100

Considering it comes with an installation disc, setting it up won’t be a problem. It’s got an onboard crossover and an outstanding power handling as well as a cast aluminum heatsink to keep it cool

So far, so good, we’re almost halfway done with our review and we’re doing good so far. From Rockford Fosgate, we’ve got the P400X4 and I’ve got to say, it’s definitely going to give you a kick for your buck. Let’s find out what qualifies it as one of the best 4Channel Amps.

Cast aluminum heatsink

Considering one of the major flaws in car amplifiers is overheating, this amp comes with a cast aluminum heatsink. This ensures there is the optimal dissipation of heat which in turn keeps it up and running for quite a long time.

Power handling

Being one of the major features that determine how good an amp is, the P400X4 will be able to pump quite an outstanding sound quality.

It’s got 50 watts x 4 at 4 ohms, 100 watts x 4 at 2 ohms and 200 watts x 2 at 4 ohms when bridged. With such a configuration, this amp will definitely be the perfect upgrade for your vehicle.

An onboard crossover included.

Yet another feature that makes this one of the best 4 Channel Amps is the onboard crossover included. This is a 12dB/octave LP/HP/AP crossover. Depending on the configuration you have, you can go ahead and set it up for subwoofer amplifiers or full range amplifiers

PROS

  • 1
    Has got cast aluminum heatsink that keeps it cool
  • 2
    Comes with an onboard crossover
  • 3
    An outstanding power handling for the best performance.

CONS

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    Tends to heat up a lot and fast in some cases

QUESTION ANSWER FAQ

Q: What Is the RMS power on this amp?

A:the P400X4  Punch is rated at 577 watts

Q: which wire size should I use?

A: 4 gauge wires should do

Q: does it come with a setup disc?

A: yes it does

Rockford R300X4 Prime 4-Channel Amplifier

Rockford Fosgate PBR300X4 Punch BRT 300-Watt Ultra Compact 4-Channel Amplifier

Durability = 70/100

Flexibility = 80/100

Performance = 80/100

Other than just being able to set up your speakers, you can set up your subwoofer using the RCA inputs. It’s also got a heatsink that plays a huge role in its durability

Yet another outstanding subwoofer from Rockford is the R300X4. To ensure that you’ll have an easy time having it in place, it’s just of the perfect size. In addition to the compact design, the performance is also quite commendable. Here’s what it’s got

A 12dB/octave crossover

So as to ensure you’ll be getting the best sound quality, it has a 12dB/octave crossover included within it. With this, the high frequency and the low frequency will be reasonably isolated which in turn ensures you get an outstanding audio experience

Cast aluminum heatsink

Since heating up too much may result in your amp getting damaged, this one comes with a cast aluminum heatsink that has got top mount controls. This ensures there is an optimal flow of air and at the same time, it won’t be difficult for you to tweak the settings

Accepts high level and RCA level inputs

Looking for the best 4 channel amp for full range or coaxial speakers? Well, this amp has a lot more to offer than just this. Whereas you can connect the speakers on the front channels, the RCA level inputs at the rare will allow you to set up your subwoofer in a bridged/mono mode.

PROS

  • 1
    Accepts both high level and RCA level inputs
  • 2
    Comes with a cast aluminum heatsink for optimal heat dissipation
  • 3
    Top mounted controls which make it easy to set it up

CONS

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    It may heat up quite quick

QUESTION ANSWER FAQ

Q: does it come with speaker level inputs?

A: yes, it does come with speaker level inputs

Q: what are the dimensions of the amp?

A:13.2”x 6.8”x 2”

Q:what is the wattage on this amp?

A:40W x 4 @ 4-Ohms, 60W x 4 @ 2-Ohms, 125W x 2 @ 4-Ohms Bridged

MTX AUDIO THUNDER500 1 THUNDER SERIES CAR AMPLIFIER

MTX AUDIO THUNDER500 1 THUNDER SERIES CAR AMPLIFIER

Durability = 80/100

Performance = 70/100

User-friendly = 70/100

It’s got a subsonic filter, a surface mount PCB for the sake of durability and with the variable low pass filter, you’ll have a fair amount of frequency isolation

Comin up 6th is the MTX Audio THUNDER75.4. If you’re all about taking your car audio system to a whole new level, this Amp might just do the trick. Let’s take a look at what it packs under the hood, shall we?

A variable low pass filter

In order to give you the best bass, the Audio THUNDER75.4 has a low pass filter included within it. This makes it possible for the low frequencies to be isolated hence giving you a loud and clear bass.

Speaking of the bass, it is worth pointing out that there is a selectable bass boost which is yet another reason this might just be the best 4 channel Amp for you

A surface mount PCB

Within the small footprint design of this subwoofer, you’ll be getting a surface mount printed circuit board. This utilizes smaller and more efficient parts that are vibration resistant which in turn allow for long-term functionality.

Also…

You will be getting a subsonic filter on this amp that allows for complete customization of the sound for all the different types of music. The fact that it is also has a class D topology renders it one of the best as far as efficiency is concerned since there will be excellent thermal management.

PROS

  • 1
    A surface mount PCB for long-term functionality
  • 2
    A variable low pass filter for the best bass.
  • 3
    The subsonic filter allows for sound customization of the different types of music

CONS

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    It’s unfortunately not suitable for FM

QUESTION ANSWER FAQ

Q: is this amp bridgeable?

A: no, it’s a mono 1 channel amp

Q:does it come with a warranty?

A: yes, provided you purchase it from an authorized MTX dealer

Q: does it have a bass knob?

A: yes

BOSS Audio R1004 – Riot

BOSS Audio R1004 - Riot

Performance = 80/100

Durability = 70/100

Versatility = 70/100

The MOSFET circuit ensures that power handling is optimal and sound quality is the best. It’s also got a coated PCB, short protection, and switchable input levels

Boss Audio has been around for quite some time and is renowned for having some of the best. let’s take a look at why this qualifies to be on our top ten list, shall we?

MOSFET circuitry 

So as to ensure the amp stays up and running for the longest time and at the same time give you the best performance, the R1004 has got MOSFET circuit. This keeps power handlingat its best to give you a good sound quality and simultaneously will serve you for quite some time.

Short Protection

The auto shut off feature included in the R1004 ensures that it does not get damaged if the speaker gets too hot of just in case the speaker fails if it gets short-circuited.

Power handling

For the power handling 100 W MAX Power @ 2 Ohm x 4 Channels and 50 W MAX Power @ 4 Ohm x 4 Channels. At This should be enough to give you an ideal sound quality.

Conformal coated PCB

Besides the short protection, it comes with a conformal coated PCB. With a conformal coated printed circuit board, it will be protected from extreme environmental conditions.

PROS

  • 1
    Switchable input sensitivity provides adjustable control over the input signal.
  • 2
    MOSFET circuitry allows switching from full to non-conduction for high efficiency.
  • 3
    Conformal coated PCB for ultimate durability

CONS

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    It’s got a buzz that may be unbearable to some.

QUESTION ANSWER FAQ

Q: what is the size of this amp?

A:it measures 7.8 x 9 x 2 inches

Q: can this amp be able to support 10” subs?

A: yes it can, just ensure you don’t exceed 400 watts

Q: does it come with the hi input connections?

A: yes it does

Planet Audio AC1200.4

Planet Audio AC1200 4 Anarchy 1200 Watt MOSFET Car Amplifier

User-friendly = 70/100

Durability = 70/100

Performance = 80/100

The MOSFET circuit guarantees both outstanding performance and durability. It’s got high and low-level inputs as well as a fixed high pass filter and ideal power handling

Planet audio is yet another brand that’s renowned for having some of the best car audio components. Let's start by taking a look at how good the power handling is, shall we?

Power handling

The peak power is 1200W. besides this, you’ll be getting 225W x 4 at 2 ohms, 113W x 4 RMS at 4 ohms, 450W x 2 RMS Bridged at 4 ohms.

In order to ensure that it’s not damaged by a high-power input, it comes with an auto shut-off that protects the amplifier when it gets too heated up or the speakers fail hence causing a short.

High and low-level inputs

High-level inputs accept the speaker output signal. The low-level inputs accept pre-amp output signals that allow the addition of amplifiers as well as processors to standard factory or aftermarket units.

A MOSFET power supply

This makes it possible to switch from full to non-conductivity for a high-efficiency output. The fact that it is a class-A/B amp gives it a linear circuitry that increases sound and quality as well as power output while at the same time reduces distortions and improves efficiency.

Fixed high pass filter.

There is a fixed high pass crossover and a variable low pass crossover. With the ability to isolate the high and low frequencies, the sound quality will definitely be at its best.

PROS

  • 1
    Automatic shut-off feature that protects it if it gets too hot.
  • 2
    A variable low pass and a fixed high pass filter
  • 3
    Has got the MOSFET circuitry for high efficiency

CONS

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    Though there is an auto turn off feature, this amp tends to heat up a lot

QUESTION ANSWER FAQ

Q: how thick is this amp?

A: it’s only 2.5 inches

Q: can this amp be suitable for 6 6x9s?

A: a max of 4 such speakers should work perfectly

Q: can it be able to power 2 rear speakers and one 12” subwoofer?

A: yes, it should be enough

Rockford Fosgate PBR300X4 Punch BRT

Rockford Fosgate PBR300X4 Punch BRT 300-Watt Ultra Compact 4-Channel Amplifier

Durability =70/100

User-friendly = 70/100

Performance = 80/100

It’s got an outstanding heat management capability, both the high and low-level inputs and it also has discrete surface mount for optimal power utilization.

Easy to set up without compromising on the performance- that’s just but a tip of the iceberg of the PBR300X4will be offering you. Let’s take at a few more reasons as to why this is the best 4 channel amp for you, shall we?

Discrete surface mount

In order to increase the efficiency of the circuitry, you’ll be getting a discrete surface mount which also lowers cross-talk from other components as well as operating temperature. This makes the PBR300X4 a superior choice as compared to most 4-channel amplifiers.

Dynamic thermal management (DTM)

With the award-winning DTM, heat dissipation will be at its best. With this design, power management will be optimal and heat will be dissipated across the entire amp evenly

Both high and low-level inputs

Something else that sets this amp apart from most is the high and low-level inputs. It is also meant for the front and rear systems that require little space. For easy installation, it boasts a variable hi-level DC offset turn-on circuitry that makes it a perfect choice for any OEM system.

PROS

  • 1
    Dynamic thermal heat management technology
  • 2
    The discrete surface mount increases efficiency and decreases crosstalk
  • 3
    Designed for both front and rear systems that require little space

CONS

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    Some units come with missing parts hence ensure you closely examine yours

QUESTION ANSWER FAQ

Q: will it work with speakers rated at 65w RMS?

A: yes

Q: can I use a 0-gauge wire with this?

A: no, this would be too large a 2AWG should work fine

Q: does it come with plugs to hook it up?

A: yes, it’s got harnesses to have it in place

Rockford Fosgate R250X4 Prime 4-Channel Amplifier

Rockford Fosgate R250X4 Prime 4-Channel Amplifier

Versatility = 80/100

Performance = 70/100

User-friendly = 70/100

You can use it for both factory installed and aftermarket units and it's also got an onboard crossover included a class A/B topology for an outstanding performance.

The final amp on our review is yet another ideal product from Rockford- the R300X4. Here’s what you’ll be getting from this 4-channel amp.

Works with factory installed and aftermarket source units

The Rockford Fosgate R250X4 is literally meant for anyone who wants to take their music to a whole new level. Whether you’re looking for a suitable amp for an aftermarket head unit or one that will work with your stock stereo, this amp will just do the trick.

An onboard crossover included

Within the amp is an onboard 12dB/octave LP/HP/AP crossover. This should be enough to isolate the high and low frequencies for the production of good highs and lows hence giving you a good music experience in the long run.

Power handling

The RMS power is 40W x 4 at 4 ohms, 60W x 4 at 2 ohms, 125W x 2 at 4 ohms while bridged. Depending on the quality of sound you want, you can wire it up just the way you like it.

Class A/B circuit topology

Being a class A/B amp, it will have a better efficiency as far as power utilization is concerned. Simply put, it’s a better compromise between class A and class B amps.

PROS

  • 1
    Includes an onboard crossover
  • 2
    It’s got the class A/B topology for better efficiency.
  • 3
    It’s perfect for both aftermarket and factory installed source units

CONS

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    Doesn’t seem to process the entire signal using the line level inputs

QUESTION ANSWER FAQ

Q: what are the dimensions of this amp?

A: it should measure 13.2”x 6.8”x 2”

Q: is it for full range or mid-range speakers

A: either should work perfectly

Q:what is the distortion level?

A: I’d say it’s pretty clear

Final verdict

Wrapping up our review of the best 4 channel amp, we’ve definitely exhausted the top 10 and truth be told, there’s no other better way to get a kick for your buck. The above review consists of the most durable and efficient amplifiers you could get.


Considering there’s a buying guide of how to choose the best amp, you’re now two steps closer to getting what you need, all that’s left now is for you to play your part- simply take your pick.

Most importantly, take your time when shopping for one to ensure that you get exactly what your vehicle needs without spending more than you need. You deserve the best.

Best 4 Channel Amp – The Ultimate Review
5 (100%) 1 vote
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