5 Best Class D Amplifiers [2023 Review]

A high-quality Class D amplifier aids your typical speakers in producing a clear, powerful, and engaging sound that is a pleasure to listen to. So, if you’ve been considering purchasing a new amplifier for your home theater, you’ll find our top-class d amplifier reviews and suggestions to be really useful!

A class D amplifier is one of the most recent amplifier types that works well with home theater equipment, producing sound quality comparable to that of a professional studio. People are constantly curious about what else Class D amplifiers can do, despite how efficient and dependable they are.

We included the 5 best class D amplifiers in this review for you. If you are interested in these models, keep reading our 5 Best Class D Amplifiers review for more information below.

Our Top Pick: S.M.S.L AD18 HiFi Audio Stereo Amplifier

Features: The AD18 is not only tiny but also lightweight because SMSL uses an external power source (24V 4A) (500g). Because the amplifier is smaller and lighter than the power supply, we were even more curious to see if it could deliver the power claimed by the manufacturer.

Last but not least, there is an NFC connector on the device. You may connect your phone to the SMSL AD18 directly by bringing the two close together, which is located on the top panel.

With all of these inputs, the AD18 can connect to nearly anything; unfortunately, the digital input only supports 24bits/96kHz.

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If you want to use the AD18 for home theater or if you’re simply too far away, the remote controller comes in handy for adjusting the volume. Even if it’s just plastic and SMSL doesn’t give the batteries, it’s still a thoughtful gesture when you consider the price.

The power supply is rated for 24V 4Ah, which translates to the maximum power usage of 50W, thus the SMSL AD18 won’t significantly increase your electricity cost.

A Bluetooth antenna is included with the amp, and it appears to receive the signal nicely. We could hear the music without shuddering even from above.

There were no bothersome disconnections, however, there is a noticeable difference in sound quality between Bluetooth and USB.

  • USB coaxial analog Bluetooth
  • Two optical inputs
  • Two optical inputs
  • Customizable
  • Poor customer service

Runner Up: BOSS Audio Systems AR3000D Class D Car Amplifier

Features: Please keep in mind that this amp requires a healthy electrical system, as well as a low-gauge cable capable of supplying the required current.

The thermal protection circuit switches the amplifier off and allows it to cool before turning it back on if it becomes too hot. If a speaker breaks, resulting in an electrical short, the protective circuit will stop the output and keep it off until the short is addressed.

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These safety measures provide you with peace of mind by ensuring that the amplifier is always monitoring conditions in order to protect itself.

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The Boss Audio Armor AR3000D Class D Monoblock Amplifier will boost the bass in your vehicle.

This Amplifier delivers a punch with its 3000 Watts Max Power and MOSFET power supply. Variable Low Pass Crossover, Bass Boost, Subsonic Filter, and Remote Subwoofer Control allow you to tweak the sound. Connect this amplifier to a second AR3000D for double the power.

The Armor Series of Amplifiers combines amazing power and performance with a thin, feature-rich design for portability.

Switchable Input Sensitivity allows you to connect the amp to any standard source unit and be certain that it will be within range to correctly match the source unit’s output, enabling you to utilize the source unit’s volume controls as intended.

  • Able to continuously power loads of 1 Oh
  • Strapping Capable
  • Subsonic filter
  • Goes to protect mode frequently

Best for Budget: SMSL SA50 50Wx2 TDA7492 Class D Amplifier

Features: It arrives in a standard package, as you can guess. They provide a variety of color gadgets to meet your preferences. The blue one we purchased looks lovely and provides a small pop of color to our desk without being too noticeable.

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Bluetooth transmission is another excellent element of the SMSL SA300. It has a Bluetooth chip that lets you stream music wirelessly from your smartphone or another Bluetooth-enabled device.

The chip supports Bluetooth 5.0 and the aptX transmission codec, allowing for near-CD quality listening.

The SA300 is a straightforward and efficient connection. It has Bluetooth, as well as an analog RCA audio input and a Micro USB port.

Speaker terminals and a Subwoofer output on an RCA connection are available at the amplifier’s output. All connections are gold-plated (excluding the Micro USB port) for increased conductivity and oxidation resistance.

The SMSL SA300 is a compact integrated amplifier that doesn’t stand out at first sight. We can certainly claim that we are familiar with SMSL as a brand at this point. We have tested a variety of their DACs in various price ranges and have always found them to be extremely decent-sounding and fair value for money.

  • Super bass
  • Bluetooth
  • Low power standby
  • Exciting and insightful
  • Layering
  • Market-disrupting value
  • Nothing

NAD – D 3045 hybrid digital DAC/Amplifier

Features: It’s usually the same book-like chassis with a curved top edge that may be placed horizontally or vertically. While the aesthetic is appealing, there are probably more elegant amplifiers available for the same price.

NAD has added an asynchronous USB input in addition to two optical and coaxial digital inputs that utilize the D 3045’s hi-res DAC.

This is for connecting a computer to eliminate jitter and optimize USB for audio playing by using the amp’s precise clock instead of the computer’s. Analog inputs are also available for those who like them.

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NAD, a firm that has been blowing the minds of audiophiles since 1972 by introducing an inexpensive hi-fi amplifier capable of delivering high current, HD music.

Even though they are not the conventional corporation that they has been since their inception, they have changed to the changes and done so well.

Now, NAD offers hardware for the modern age, like the D 3045, which offers a greater selection of digital audio options at accessible rates.

NAD was formerly regarded as one of the top stereo amplifier manufacturers in the world. This is not to imply that they are not one of the greatest brands, but it would be tough to make such a conclusion among the various brands available today.

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They had created a reputation for themselves, though, by offering consumers the dependable audio they sought at a fair price and with the touch of a button.

  • Balanced and detailed
  • Capable timing
  • Loads of features and connections
  • Lacks agility

Buyer’s Guide for 5 Best Class D Amplifiers

When you expand your home stereo system vocabulary, understanding Class D amplifiers becomes easier. There are several parameters that may be used to compare one amplifier to another.

It’s only a matter of time once you understand what they are and what they imply to locate the ideal amp for your stereo speakers.

Class D Amplifiers: What Are They?

Amplifiers of the Class D category are used to improve the sound quality of musical instruments and speakers. If you want to improve the sound quality of your speakers, you should consider using a Class D amplifier.

Because the majority of today’s speakers are recognized for their poor sound quality and clarity. As a result, a class D amplifier will help make a difference in sound.

Many people are becoming aware of the necessity of owning a Class D amplifier, but finding one isn’t as simple as most people believe.

Without adequate information and understanding, it will be impossible for anyone to go to the market and shop for a Class D amplifier.

What Makes Class D Amplifiers So Special?

Amplifiers were regarded as analog solutions alone until transistor technology reached a realistic level, and digital or class D amplifiers are new additions to the amplifier family.

One of the most common difficulties with analog amplifiers is inefficiency, which occurs when the quantity of power produced is insufficient to provide the intended performance. As a result, instead of creating energy, it is squandered as heat.

Class D amplifiers have been a big relief in that they have fixed this lingering problem, and even the inexpensive class D amplifiers that we will discuss in this tutorial are ideally constructed to handle this difficulty.

Because a high-efficiency design implies the class D amplifier doesn’t need to be cooled all of the time, class D amplifiers may be portable and small. Keep reading for 5 Best Class D Amplifiers.

Size And Weight

Because everyone’s demands are different, the size and weight of the class D amplifier you wish to buy are determined by the user.

A user may require a portable class D amplifier in a variety of situations. However, there are additional reasons or circumstances that can lead a user to choose a non-portable amplifier.

Other factors will determine whether or not a user requires a heavy-duty amplifier, and other factors will determine whether or not a user does not require a heavy-duty amplifier.


When looking for the best budget class D amplifier, it’s also important to consider this factor. It’s crucial to remember that the amplifier’s specifications will determine how much you pay for it.

This doesn’t imply you have to spend a lot of money on a Class D amplifier. There are undoubtedly budget-friendly class D amplifiers that deliver the same high-quality sound as more costly class D amplifiers.

It’s for this reason that finding a low-cost class D amplifier with the specs you want is critical. Keep reading for 5 Best Class D Amplifiers.

Input Type

A user with Input Type A must decide whether he wants a wired or wireless class D amplifier. Both solutions are excellent, yet they both have flaws.

Many individuals prefer wired class D amplifiers because they feel they are more traditional and trustworthy, although a wireless class D amplifier will suffice if it is within range.  Keep reading for 5 Best Class D Amplifiers.


The amount of power an amplifier generates is an important characteristic to consider when purchasing a class D amplifier.

A class D amplifier is defined by its ability to produce crisp, high-quality sound, and it can only do so if it has enough power. A class D amplifier, on the other hand, will not sell if the sound quality is poor.

Frequency Reaction

For your amplifiers, a good frequency response is essential. This range determines which digital signal frequencies the amp will detect and deliver to the speakers for particular audio quality.

Most Bluetooth-enabled amplifiers now support frequencies ranging from 20Hz to 20kHz. The Fosi Audio BT20A demonstrates how the 20Hz to 20kHz range may deliver a genuinely superb performance.

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A standard audio amplifier, on the other hand, would never be able to catch that bass with original soundstage depth regardless of frequency response if you don’t have a specialist amp for subwoofers.

For modern home cinema, we propose the Planet Audio TR3000 subwoofer amplifier.  Keep reading for 5 Best Class D Amplifiers.

Wired Networking

Wireless connectivity, as appealing as it seems, is not without its drawbacks. There isn’t a Bluetooth amplifier on the market that can link with several devices without switching.

When it comes to wired connectivity, though, you can count on a flawless experience. Amplifiers for passive speakers are the same.  Keep reading for 5 Best Class D Amplifiers.

The speaker wire of a typical amplifier will connect to one or two audio systems, while the power line will remain hooked into a DC outlet. It can still connect to source devices such as laptops, PCs, TVs, smartphones, and other Bluetooth devices.

Other than Bluetooth 4.2, the S.M.S.L AD18 is our favorite because of its many connectivity choices via USB, AUX, optical, and coaxial input systems.

Version & Range of Bluetooth

Amplifiers and speakers now have Bluetooth connectivity, which removes the need for an extra set of cords. It genuinely assists you in cleaning up your TV rack and removing a suspicious connection from your bookshelf amplifier.

Newer Bluetooth versions (4.2 or 5.0) enable more data to be transmitted over the network with less processing time. Bluetooth versions, of course, might have an impact on the sound quality of your speaker. Keep reading for 5 Best Class D Amplifiers.

Improves the performance of the speakers and subwoofer

Amplifiers, as previously said, increase the digital signal quality so that the speakers can play it better. They also boast a cutting-edge circuitry design that reduces sound distortion. Furthermore, they have the ability to make the sub-bass and bass audible and full.

A speaker or woofer can’t produce audio signals that are lower in Hz in the first place. External power amps are available for both passive speakers and subwoofers, as well as just for subwoofers.

Ensures sound quality that is comparable to that of a recording studio

None of the gadgets we use as the primary audio source at home (phones, laptops, and televisions) can provide powerful enough digital signals to drive speakers to their full potential. Either the audio is distorted and thick, or the richness of bass is scarcely heard.

However, in order to get your speakers to their maximum output level, you’ll need high-quality amplifiers.  Keep reading for 5 Best Class D Amplifiers.

Loud and clear audio is played through your speakers

Passive speakers cannot amplify or transform weak signals into audible components, thus they play them as they are.

It’s because playing files from sources through passive speakers necessitates the use of a third-party power amp.  Keep reading for 5 Best Class D Amplifiers.

Active speakers come with a built-in amplifier and just require a power supply. Passive speakers, on the other hand, require both an amplifier and a power source, which is why some amplifiers include a “power supply.”

FAQs: Best Class D Amplifiers

What is a Class D amplifier?

A Class D amplifier is a type of audio amplifier that uses pulse-width modulation (PWM) to amplify audio signals efficiently.

Why choose a Class D amplifier?

It is known for its high efficiency, low heat generation, and compact size. It is ideal for applications where space and power efficiency are crucial, such as in-car audio systems, portable speakers, and home theater setups.

What are the Best brands known for Class D amplifiers?

There are several reputable brands known for high-quality Class D amplifiers. But some top-rated options include Hypex, NAD, IcePower, Crown, and Bang & Olufsen.

How do I determine the power output I need?

It depends on your speakers and the size of the room. Check the recommended power range for your speakers and consider the listening environment.

Are there any concerns about audio quality?

Modern Class D amplifiers have made significant advancements in audio quality, and many high-end models can provide audiophile-grade sound.

Are there any drawbacks to Class D amplifiers?

While It offers many benefits, Sometimes It has struggled with very low impedance loads and might not be as suitable for driving extremely high-end, low-impedance audiophile speakers.

How can I ensure the best performance from my Class D amplifier?

To get the best performance from your Class D amplifier, make sure to provide proper ventilation and avoid blocking airflow.  Also, use quality speaker cables and source components to minimize any potential signal degradation.

Conclusion: 5 Best Class D Amplifiers [2023 Review]

Class D amplifiers are popular because of their efficiency, which allows them to be lighter and operate cooler than their linear equivalents (class A, B, and A/B). The fact that class D amplifiers do not have the same audio quality as linear amplifiers is a big problem.

They were able to get into the Hi-Fi industry because of advancements in class D technology and error reduction. We hope you liked our 5 Best Class D Amplifiers review and it was helpful.

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