Best 2 Channel Amplifiers – Ultimate Buyer’s Guide


Want to buy a 2 channel amplifier, but you do not know where to start? Then check out our buying guide for the best 2 channel amplifiers in the market and make an informed decision.

You probably have realized that the car stereo isn’t good enough to produce the kind of music you like. For that deep bass sound that announces your presence; you may need to have a subwoofer and speakers installed. However, you will need the best two-channel amplifier to make this work. The amplifier provides that needed power for the subwoofer and speakers.

Buying the right two-channel amplifier can be a daunting task. That is why we have put together this buying guide to help you in selecting the most suitable amplifier for your motor vehicle.

Factors to look for when buying a two-channel amplifier

Shopping for the right amplifier can be a challenge. There many output measures like ohms and watts that you have no clue what they are all about. We have taken the liberty to guide you through the process of finding the best amplifier for your car or home. You will need to consider the following factors before you make your purchase carefully:

Amplifier to Speakers ratio

The rule is that you should match the amplifier that offers twice the power output of the speaker; if a speaker with omh of 6 and 200 watts will require an amplifier producing 400 watts. The best two-channel amplifiers are those that offer extra headroom. This is usually the difference between the standard operating level of the amp and the maximum that the amp can produce with having any distortions.


When it comes to amplifiers, then the impedance is what really makes a difference. The unit of measure used is the omhs – most amps come in 4, 8 and 16 ohms. When the speaker resistance is very high, then less power is supplied while more power is provided by the amp when the impedance is low. Speakers overload when the power being supplied is very high while the speaker has low impedance.

While it is common to pair a two-channel amplifier with two speakers and a four channel with four speakers you can add more speakers; but it will change your impedance (ohms). Power will be distributed differently to the speakers

Sound Quality

When buying an amplifier one barometer, you will need to look at is the signal to noise ratio. While many people associate amplifiers with loudness, it is the quality of the sound that you really should be concerned about. You should look for an amplifier that reduces sound distortions. One percent distortion is okay but anything higher than 5 percent you will have poor sound quality. The signal to noise ratio measures the relationship between background noise and sound signal. When the sound to noise ratio is good you will not be able to here background noise even at low signal levels.

Dynamic headroom

The unit of measure for this is dB and represents an amplifiers ability to increase output power at certain short periods during the lifetime of a song. This accounts for sound effects and music peaks. A dB of 3 means the amplifier has doubled output power while 6 dB means output has been multiplied by four. Seek one with higher db.

Amplifier classes

Amplifier classes are a result of how an amplifier performs in the output stage; this is the level where we have a lot of sound distortions.

Class A

This is sometimes regarded as the best amplifiers because they use 100 percent of the input signal which results in better sound quality with low distortion levels. Regardless of audio signal levels they produce a lot of heat and have limited power output. They are also large and often expensive.

Class B

These amplifiers use an input signal of between 50 and 75 percent. It mostly uses a pull and push effect. This is where when one stage is on the other is off. This pull and push causes higher harmonic distortions.

Class AB

This amplifier uses both class A and B qualities. You will see the amplifier alternating between low signals in A and higher signals in B. The Class AB makes a compromise between the inefficiencies of A and the sound distortions of B. The first watts are handled by A then later switched to B for any additional amplification needs.

Class D

This class is preferred for its low heat levels and small size. The class D has one of the highest power efficiency rates of any class at 90 percent. The input signals are taken through conversion into a series of output pulses with a higher voltage. Unwanted components are removed when the output pulses are passed through a filter before being taken to the speaker. However, it has one of the most inferior sound quality of the classes.

Class G

In this class, power is switched continuously along stages. This leads to a reduction in heat reduction and power loss. The Class G is an updated version of Class AB.


When you are buying a 2 channel amplifier, you will need to ask yourself, what equipments am I connecting? There are many types of cables out there, and if you are not careful, you may buy an amplifier that is hard to connect. You can have 3.5mm ports for headphones, USB ports for laptops and Phono for your turntables.


Other extra features that you should check for will include if the amplifier has bass controls. Modern amplifiers will let you select the amount of base that wants. You should also check how an amplifier handles excess heat; aluminum chassis are usually preferred for this.

Reviewing the best 2 channel amplifier

AmplifierEditor reviewAmp (Watts)OhmBuy Here
Polk Audio 300w 2 channel MOSFET amplifier4.1754Amazon
Kicker 43DXA125.2 125-Watt 2-Channel Full-Range Car Amplifier4.3602Amazon
Rockford-Fosgate-Prime-R150X24.475 2Amazon
Pioneer GMA3602 2-channel Bridgeable Car amplifier4.1602Amazon
Dual Electronics XPE2700 High performance power MOSFET4.075 2Amazon

1. Polk Audio 300w 2 channel MOSFET amplifier

The amplifier will give your car a rich sound with power peaking at 300 watts. The amplifier comes with high and low pass crossover. Power is able to handle up to 4 ohms impedance. When it comes to some bass action then the Polk audio comes with a 3 position bass boost – 0 dB, 6 dB and 12 dB.

Gone will are the days when you experience sound distortions; the amplifier has a sensitivity of 80 dB that picks up the highs and lows for excellent sounds. You can handle multiple configurations through the bridgeable design. The Polk Audio comes with a high-speed MOSFET switching power supply with high current bipolar output transistors.

You will experience less rigidity and shrinkage thanks to a double layer fiberglass and smaller amp footprint. A multi-color LED lights keep you updated on the performance of the amplifier. The speaker level input allows you to connect to almost any car speakers.


  • 3 position bass boost
  • Reduces sound distortions
  • High-speed MOSFET power supply
  • Fiberglass footprint that reduces rigidity


  • May not be suitable for those looking for high bass


View price on Amazon

2. Kicker 43DXA125.2 125-Watt 2-Channel Full-Range Car Amplifier

If you are looking for something to intensify your car surround system them the Kicker, 2 channel amplifier is what you need. This 125-watt amplifier works well with your subwoofers and tweeters. With a bass boost, you should get high-quality sound from your system.

The kicker can go beyond the rated power level and has a frequency response of 10Hz to 20Hz. The kicker delivers almost three times the factory speakers. With a differential balanced input, you can eliminate most of the noise.

When connecting the kicker, you will need a speaker wire that will connect to the RCA adapters. There are no on bound fuses; it is recommended you add a 40 amp inline fuse when you are using multiple amps. This you connect to the distribution block and the amp.

The kicker is known for making efficient products, and this amp is light enough to fit into most motor vehicles will producing excellent sound.


  • Eight gauge power and ground leads
  • Preamp and speaker level inputs
  • CEA – 2006 compliant
  • Variable bass boost
  • Variable high and low pass filters


  • Does not support a lot of speakers


View price on Amazon

3. Rockford-Fosgate-Prime-R150X2

This amplifier can help you get your groove on while driving. It is capable of powering two 50 watts RMS speakers or one 150 watt RMS subwoofer in the one channel mode. You can hook up this amplifier to almost any speaker through the speaker level input.

The Rockford is made from a durable aluminum chassis that can ensure uninterrupted play by drawing excessive heat from the amp. You also do not need to worry about the amp damaging your subwoofer because the Rockford amp has internal sensors that monitor and regulate the power output and impedance.

If you are looking for that rich bass sound, then the Rockford amplifier has a variable bass boost that will announce your presence.


  • Variable high and low pass filters
  • Variable bass boost
  • MOSFET power supply
  • Durable aluminum chassis that keeps amp cool
  • Inbuilt sensors to monitor power output


  • May not be suitable for those who want very loud music


View price on Amazon

4. Pioneer GMA3602 2-channel Bridgeable Car amplifier

Pioneer has over the years been synonymous with music systems. The amplifier has a maximum output of 400 watts. This a compatible amplifier for your RCA outputs with two RCA ports. You get uninterrupted supply of 90 watts per channel. The frequency is moderate at 10 Hz to 70 Hz. There is little background noise, and signal to noise ratio is maintained at 95 dB.

This is the right amplifier for your car system; you will soon be enjoying doing trips in your car. It also has inbuilt high pass crossover, and for easy connection, you get speaker level inputs. Pioneer amplifiers do not only produce loud music, but it is clear enough even when you are driving. To ensure that there is no power supply loss the pioneer amplifier comes with a toroidal transformer that uses MOSFET high-speed switching.

You do not need additional adaptors to connect your OEM units; the pioneer GMA3602 amplifier comes with speaker level inputs.


  • Maximum power output of 400 watts
  • Signal to noise ratio 95 dB
  • Speaker line input turn-on sensor
  • Connection to OEM unit without add-on adapters


  • Low power output


View price on Amazon

5. Dual Electronics XPE2700 High-performance power MOSFET

This amplifier gives you superior sound quality due to its linear circuitry. The dual Electronics high-performance power MOSFET produces 400 watts of peak power while reducing sound distortions. You can have 150 watts via one channel at 4 ohms or have two channels at 2 ohms with 75 watts of RMS.

You can add some subwoofers to your vehicle because the dual electronics has low/high pass variable crossovers that increase the amplifiers versatility. To protect your speakers from short circuits, the dual electronics comes with thermal, and DC offset safety protection.

The car amplifier comes with a user manual that lets you start enjoying quality sounds. You will, however, need an electrician to set it up for you. The signal to noise ratio is moderate at 75 dB, with a frequency of 20Hz. When setting up, you have the option of two speakers; 2 speakers and a subwoofer or one subwoofer.

The full range crossover lets you two connect two other high-performance amplifiers for increased sound and efficiency. The aluminum heatsink provides the necessary cooling mechanism for the amplifier. The bass sound is powerful enough to announce your presence.


  •  Inbuilt short circuit connection
  • Full crossover enables you to add extra speakers
  • Efficient MOSFET allows maximum output of 400 watts
  • Linear circuitry reduces sound distortions


  • Low power output


View price on Amazon


After careful review, we have a winner – the Rockford-Fosgate-Prime-R150X2. The Rockford has received very many positive reviews from customers. We were impressed by its power output and aluminum chassis that dissipates heat. The amplifier works well with your car’s subwoofer to produce a rich bass sound.


About Author

Martin is a car and equipment enthusiast. Like many kids his age, he always liked cars since he was a kid and the passion stuck with him. These days, he lives out his passion on the blogosphere, giving others advice on handling equipment and car sound systems. He also enjoys teaming up with other enthusiasts and sharing the knowledge of car equipment with them, with the aim of fostering mutual appreciation. When he is not analyzing car sound systems or equipment, Martin is sampling tasty dishes in different places and exploring the world around him. He is an avid reader as well, and that energy translates well to the site.

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