In today's day and age, we are all looking for ways to save money more so if you are a music lover and is big on having the perfect sound being emitted from your vehicle. Adding a car amplifier is definitely one of the most cost effective ways that you can improve the sound quality of audio system in your car. An amplifier's main job is to boost the signal that the head unit gives, thus really improving the quality of the sound that you or other passengers in your car experiences.

Additionally, a lot of the aftermarket speakers will actually need more power in order to operate correctly; and sadly, the built in amplifiers that most available head unit carry are actually not that powerful enough to power these speakers. Therefore the sad news about this is that without an outboard amplifier, you will never experience the high-quality music reproduction in your car, the way the music is supposed to be reproduced and listened to. It is with the hope of doing justice to the music being emitted from your car that , using a separate amplifier is tremendously convenient especially if you are a music junkie and an audio enthusiasts like myself.

Therefore another tricky hurdle to overcome is actually selecting the perfect amplifier for your car, to reproduce music the way it ought to be reproduced; the world class way! Choosing a good car amplifier is actually a very challenging job seeing that there are so many different 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 4 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 isnt it?

Below I have prepared reviews on the best 4 channel amplifiers available on the market to help you choose which one is best for you. All you have to do is just enjoy listening to the clean and good audio quality for me!


RMS Power Rating :

JL Audio JX360/4

• 4 ohms : 70 watts x 4 chan. + 300 watts x 1 chan.

• 2 ohms : 90 watts x 4 chan. + 500 watts x 1 chan.

• Bridged, 4 ohms: 180 watts x 2 chan.

• Number of channels : 4-Channel

• THD Rated Power : 1% @ 4 ohms

• Amp class : AB class

• Max RMS power output : 360 W

• Frequency Response : 20-30k Hz

• Bass boost on sub channel : N/A

Touted as the best 4 channel speaker on the market is the JL Audio JX360/4 4CH. This Amp is a sturdy and high performing Amp that has high-grade parts that manages the heat excellently and also provides high current flow, thus continuously delivering stable performance in almost any type of situation. Whilst it is not overly flashy in terms of those overly bright blinking lights or meters that tend to be on the outside of other amps, this product gives you a rugged MOSFET power supply from inside and along with beyond normal large transistors on the outside. Not only is this sleek, has a high mass aluminum heatsink that keeps things cool enough to virtually eliminate thermal shut-downs. Being in the class A/B circuitry means it's not only louder, but sounds great and undistorted as well. I can also safely say that this amp is really powerful and this definitely represents good value for your hard earned dollar.

Whilst this amp represents good value I have seen where persons have attested to the fact that it may be a bit hard to used this amp on a hot summer day as it may go into thermal shutdown or it might smoke a transistor. As a result of this it would probably be impossible to keep your hand on it for more than half of a second.


RMS Power Rating :

Rockford Fosgate PBR300X4 Punch BRT

• 4 ohms : 75 watts x 4 chan

• 2 ohms : This Amp only operates at 4-ohms

• Bridged, 4 ohms: Not Bridgeable

• Number of channels : 4-Channel

• Load impedance capability : 4 ohms

• Amp class : BR class

• Efficiency (average): 55% @ 4-Ohm

• Total max power : 300 W

• Frequency Response : 20 Hz – 20k Hz +/-1dB

Fully designed for compact systems, these amps are fairly efficient and are best suited for motorcycles, ATVs as well as hybrid electric vehicles as they do not necessarily suck a lot of juice from your electrical system. In fact, for its size I was mightily surprised at how powerful this little baby is. Operating at optimum efficiency, and bolstered by the Boosted Rail Technology (BRT) the sleek and ultra compact design is capable of generating 300 Watts of power, which is really impressive. The case is so small that it is literally the size of your hand (Yes I know it is hard to believe but it amazes me as well. So in essence, this amp can handle musical peaks and still misses no beat. Additionally, the amp also features speaker level inputs that has signal sensors when it is turned on, which allows you to connect into almost any system without having to run a turn-on lead back to the receiver. Additionally, this amp comes with an extruded aluminium 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.


RMS Power Rating :

Rockford Fosgate R400-4D 400 Watt

• 4 ohms : 75 watts x 4 chan.

• 2 ohms : 100 watts x 4 chan.

• Bridged, 4 ohms: 200 watts x 2 chan.

• 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

This little Amp packs quite a punch! I remember my friend saying to me that he had to check and double check as he could not believe that a class D amp was being sold for such a great price. This is another amp that also represents value for money. This 4 channel full range Class D amplifier optimizes its power and is able to power a full range front/rear speaker system. Additionally this amp allows you to also bridge the front and/or rear channels enabling you to run a subwoofer or two. The design allows for efficieny with the cast aluminum heat sink taht allows it to to keep it in a confined space.

This amp also comes with a top mounted LED indicator that shows blue whenver the unit is turned on. Additionally, the LED light turns to red when a protection circuit engages which represents good value for your investment as a short circuit or too low of an impedance is detected at the speaker connections. This is useful as the amplifier automatically turns off if self this occurs; this is a very cool feature. The Class D amp as I mentioned is great value for money.


RMS Power Rating :

4 channel hifonics BRX1616.4 Brutus

• 4 ohms : 200 watts x 4 chan.

• 2 ohms : 400 watts x 4 chan.

• Bridged, 4 ohms: 800 watts x 2 chan.

• 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

A key feature of this amp is that is comes equipped with 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 are a sure sign of a sound investment. This is so as the green light indicates when the amp is on and running according to plan whilst the red illumination represents a sensor picking up a short circuit or irregularity somewhere that would cause malfunction or overheating thus consequently damaging the transistors; which as you would imagine would not only get you frustrated but will cause you to dip in your pocket once more. Additionally, this amp is equipped with heavy aluminium alloy heat sink that absorbs the heat thus contributing to the longevity of your investment as well. In addition, there is near to 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.


RMS Power Rating :

Planet Audio AC2400.4 ANARCHY 2400-watts 4channel amp

2 ohms : 420 watts x 4 chan.

Bridged, 4 ohms: 840 watts x 2 chan.

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 top quality amp that is very powerful. Whilst it is not as popular as the more well known brand, one thing is guaranteed is that this amp gives you absolute quality in more ways than one. An added bonus as well is that the amp is also very rugged and as such is quite scratch resistant; again protecting your investment. I like the fact that this amplifier 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 of the crossover distortion that is possible with class ‘B’ amplifiers. A class A/B amplifier combined together therefore is much more efficient than a class ‘A’ but without the possible distortion that is normally experienced with a pure class ‘B’.

In addition, the speakers do reproduce speakers’ sounds that are based on high, low or mid ranged frequencies. The high pass crossovers are geared specifically towards “highs” such as all size speakers, mid ranges and tweeters and in the same way as the low-pass crossover setting specific sound specifications such as the bass, mid-range and high frequency reproduction.

This amplifier goes for a selling rate of around US$100, and as such is a very good value for money that is sure to be a well made long term investment.