Best Class D Amplifiers Reviewed

Class D amplifiers are an amazing addition to the sound market and they are more compact, powerful and highly efficient compared to the class A/B amps.

The main reason is that this allows the class D to convert the input analog signal into a pulse width modulated waveform.

As a result, they produce less heat and have a 90% efficiency. The following article reviews ten best class D amplifiers in the market.

10 Best Class D Amplifier

1. Alpine MRV-M500 

best class d amplifier

The Alpine MRV-M500 is one of the best models in the market and is extremely versatile. When connected with subwoofers, the Alpine MRV-M500 provides brilliant sound.

With the help of enhancing shutdown performance technology, the output is reduced so that the amplifier cools down when hot, while you continue playing your music.


2. Fosi Audio BT20A

One of the most reliable choices for a home stereo is the Fosi BT20A. A 100-watt RMS per channel is offered by the amplifier and it also features Bluetooth 4.2 connectivity.

It is one of the low priced options and is backed by a warranty of eighteen months. This amplifier also has the capacity to drive 8-ohm and 4-ohm speakers.


3. SMSL AD18

The SMSL AD18 powers two channels at 80 watts each and has an extremely NFC pairing. It has a subwoofer output and a high-gain external antenna.

The amp comes with a built-in digital signal processor and comes with aptX low-latency compatibility. The SMSL comes with Bluetooth support and also decodes optical and coaxial signals.


4. Dayton DTA1 Class D Audio Amplifier

This is one of the cheapest amplifiers around and with class-T topology and is highly compact compared to other products in the market.

The Dayton DTA1 Class D Audio Amplifier is amazing for travel and highly compact for home. Almost 90-percent efficiency is provided by this class D audio amplifier.

This cheap and affordable $30 Dayton amplifier is a fantastic budget-oriented choice.


5. Skar Audio – Mosfet Amplifier

The Skar D amplifier is one of the most expensive amplifiers in the market as it costs around $580 and offers a range from 350 to 4500 watts.

It contains high-quality MOSFET transistors and this amplifier is wired for single ohm amplifications. Remote control bass boosting is also provided with the amplifier.


6. Ignite Mono

With a maximum RMS of 750 watts, you can easily get your hands on this amazing and highly affordable amplifier in just $90. Peaking at 4000 watts, the Ignite R1600 is meant for 1 to 4-ohm applications and has a low-resistance bass cabinet.

However, one issue is that this may damage smaller speakers. One feature that sets this amplifier apart and provides extremely minimal heat build-up.


7. Behringer Europower

The Behringer costs around $500 and costs a fortune but every cent is worth as this product is that good.

The output jacks used are popular speak-on and the XLR and TRS inputs are commercial grade. For live shows and studios, Behringer Europower amplifier is perfect and delivers a 900-watt RMS rating that makes it ideal for high-quality acoustics.


8. SMSL – Compact Class D 

With perfect size and design, the product is beautiful and is in silver colour that melts your heart. This is not just a beautifully designed product but also has an excellent quality performance.

The performance is highly optimal, despite its small and compact size. However, the product comes with necessary adjustments and integrates attractive designs and reliable functions.

With some thermal and electrical applications, the SMSL SA50 Class D amplifier with a power adapter is highly durable.


9. Power Acoustik

Costing less than a hundred and thirty dollars, this Power Acoustik RZ5 amplifier is highly compact and fits in small places easily.

It is less than two inches thick and is so good that it easily outperforms many more expensive products that are available in the market. This amplifier averages around 900 watts at 4 ohms.


10. Taramp HD 3000

Unlike other products in the market, this one is totally suited for your car and you should get it instantly. One of the significant developments of this amplifier is that it contains the smart usage filter that provides highly superior quality performance and can support different power settings.

Taramp HD 3000 is a highly compact product and can be easily optimized and set up and it also has protections against thermal and electrical conditions that add to its durability.


Buying Guide on Class D Amplifiers


Some Considerations

The sound source is the mind of the sound system. It peruses the music, recorded carefully, on any media (CD, USB, SD cards, Bluetooth from a cell phone, iPod, radio, and so on.), and changes over it into an electrical signal. The amplifier builds the power of the audio signal recently created by the source.

More often than not, the serial sources that come in our vehicles as of now incorporate a little inside amplifier. Hence, they are associated legitimately to the loudspeakers in the standard gear.


RMS & Max Power

The RMS power rating is the proportion of consistent power that an amplifier can yield, or a speaker can deal with. RMS power is gotten from Root Mean Square which is a statistical measurement of the size of a fluctuating amount and is applied to voltage or current. This type of power rating alludes to the maximum measure of power the speaker can deal with in a moment without harm.

In many cases, this rating could be come to with a major bass hit or an extremely loud note in a melody as it’s played utilizing the right amplifier.

We don’t suggest that you utilize the peak, max, PMPO or dynamic power rating while arranging your system since it doesn’t mirror the item’s ability under regular use.

Makers despite everything publicize peak power in light of the fact that most shoppers are ignorant of its meaning.


Mono Channel vs Multi Channel

A mono amp (monaural) has one input and one output. This is the kind of amplifier that may be utilized in a public address system, or now and then two high-end mono amps will be utilized in a hi-fi system with one dealing with the left and the other the right channel. A two-channel amp is all the more regularly called a stereo amplifier.

Normally utilized for customary hi-fi systems that have only a left and a right channel (or earphones with left and right earpieces). Multi-channel amps are ordinarily utilized for encompass sound systems, where there are typically left-front, right-front, left-rear, right-rear and sub-woofer channels.

In addition to some likewise, bolster a front-center channel for better speech discernment.


High Current Amp


In ‘Theory’ a High current amp is an amp that is equipped for conveying fundamentally “higher” current than standard design practices would direct.

For example, an ‘ordinary 100-watt amp would create 28.5 volts at ~9 amp into a fixed 8-ohm load, and a ‘high current amp’ may do likewise yet be equipped for conveying 11 amps.

Tube amps are currently constrained by the yield transformer [OTL amps by the circuit]. A large portion of the “high-current” designs are Solid State, and are either (as referenced above) down-rated amps, or amps with anomalous larger than average power supplies; whichever way except if your speaker needs it, the amp won’t convey it, independent of the MFG claims.

Go for an amp that sounds great – to you!  and one that you can afford.


Frequency Response Management & Harmonic Distortion?

A frequency response measurement reports the output degrees of a DUT when animated with various frequencies of the known level.

The least difficult of all frequency response measurements comprises of just a few tones, the first close to the center of a DUT’s usable frequency range, and followed by a tone close to the higher extreme of the range and at times a tone close to the lower extremity. Harmonic distortion is the undesirable expansion of new tones to the audio signal.

These tones are harmonically related tones to the first signal. It measures everything that doesn’t characteristically has a place with the audio signal, as it was everything you would prefer not to hear. For example, units that endeavor to create an unadulterated sine systematically include distortion as harmonics, which were not there in any case.

On the off chance that the signal is a 1kHz sine wave, the harmonic frequencies are regularly produced.


The objective of class d audio amplifiers is to repeat input audio signals at sound-creating output elements, with wanted volume and power levels-loyally, productively, and at low distortion.

Audio frequencies range from around 20 Hz to 20 kHz, so the amplifier must have a great frequency response over this range (less when driving a band-limited speaker, for example, a woofer or a tweeter).