Top 10 Best class D amplifier – Buying Guide for 2021

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To begin with, class D amplifiers have low weight and offer high power. Thus, these amplifiers are the best to be used during live performances. Class D amplifiers use extra circuitry for the conversion of analog signals to higher pulse. You can use class D amplifiers to enhance the sound quality of home theater or television sets. Furthermore, class D amplifiers also let you record songs and music in high sound quality. Before you buy the best class D amplifier, do go through a genuine review guide. This article covers authentic and unbiased reviews of the best class D amplifiers in the market. Besides, you can also clear your doubts by reviewing the FAQ section. Meanwhile, you can check out our review suggestion on the best SATA cables.

Table of The Best Class D Amplifier

Photo	Title	Buy
	BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers 100W x 2 with Bass and Treble Control TPA3116 (with Power Supply)
	Rockford Fosgate R500X1D Prime 1-Channel Class D Amplifier,BLACK
	SMSL AD18 80W2 Bluetooth 4.2 HiFi USB DSP Digital Decoding Power Amplifier
	Alpine BBX-T600 600W Max BBX Series 2-ohm Stable 2 Channel Class-A/B Amplifier
	Skar Audio RP-75.4AB 500 Watt Full-Range Class A/B 4 Channel Car Amplifier
	SMSL SA50 50Wx2 TDA7492 Class D Amplifier + Power Adapter (Black)
	Dayton Audio DTA-1 Class D AC/DC Battery Powered Mini Amplifier 15 WPC
	Behringer Europower EP4000 Professional 4,000-Watt Stereo Power Amplifier
	Ignite Audio R1600/1D, Class D Mono Block Car Amplifier - 4000 Watts Peak Power
	Power Acoustik RZ1-3500D 3500W Class D Monoblock Amplifier, Black

10 Best class D amplifier Car

01. Fosi Audio BT20A Bluetooth Amplifier

Product Features

• Offersfrequency range of 20Hz to 20kHz 
• Comes with a warranty of 18 months
• Easy to install 
• Has a compact design
• Offers 24 Volts of supply
• Undertake Bluetooth amplifications easily

Product Specification

• Brand: Fosi Audio
• Model: BT20A
• Weight: 2.09 pounds
• Dimensions: 10.2 x 8.03 x 2.83 inches

Product Description and Performance

Fosi Audio BT20A set up easily with various Bluetooth-enabled devices. Your devices will get duly connected with the help of QCC3003 chips. Thus, you will get stable and robust connectivity up to a range of 33 feet. In addition to this, Fosi Audio contains a TPA3116D2 chipset. Henceforth, you will get a harmonic distortion of around 0.04%.

Along with several features, Fosi Audio BT20A offers connectivity to passive speakers. Now you will get quality surround sound while watching movies on a home theater. Last but not least, BT20A has a sleek design. Consequently, you can easily store it inside a drawer or a rack.

Pros

• Works fine under 12 to 25 volt
• You get to control treble and bass
• Advanced circuitry design
• Easy to handle

Cons

• Do not work with powered speakers
• You need to have some technical knowledge

02. Rockford Fosgate R500X1D, One of The Best class D amplifier

Product Features

• Comes with an infrasonic filter
• Includes octave range of 12dB
• Has a frequency range of 20 to 50 Hz
• Offers a remote control
• The heatsink is made of cast aluminum
• Offers protection from short-circuiting 

Product Specification

• Brand: Rockford Fosgate
• Model: R500X1D
• Weight: 5.09 pounds
• Dimensions: 8.5 x 6.8 x 2.0 inches

Product Description and Performance

All in all, Rockford Fosgate R500X1D is the best amplifier for automobiles. This product contains real-time thermal sensing as well as a phase switch. In effect of this, you will get high quality and crystal clear sound. The Rockford Fosgate R500X1D provides authentic safety from overheating. Thereby, you do not have to worry about short-circuiting issues. Meanwhile, the heatsink is made up of cast aluminum, increasing the amplifier’s life span.

Pros

• You get a remote to control bass
• Thermal sensors
• Easy to use
• Compliant with CEA-2006

Cons

• Only the plug-in option is available
• The product is a bit costly

03. SMSL AD18 Stereo Amplifier

Product Features

• Equipped with a color screen
• Comes with remote control and antenna
• Contain micro USB cable
• Supports analog and Bluetooth
• Adjustable brightness
• Offers power supply of 2 Volts

Product Specification

• Brand: SMSL
• Model: AD18
• Weight: 1.26 pounds
• Dimensions: 10.6 x 1.66 x 3.1 inches

Product Description and Performance

Notably, the SMSL AD18 amplifier diligently responds to analog as well as Bluetooth operations. Now you can either play music with the help of a CD-ROM or transfer them electronically. Thus, you will find it exceptionally easy to operate this product. Last but not least, SMSL AD18 has a commendable design. Henceforth, songs of different genres will be played with crystal clear quality. 

Pros

• Aluminum minimize any interference
• Easy to transport
• Interactive LED screen
• Dual operating options

Cons

• It is a bit costly
• The LED screen has a small size

04. Alpine BBX-T600 Amplifier

Product Features

• 3-way circuitry
• Compatible in size
• Easy to install and use
• Snap-on terminal
• Mono or dual-channel operation
• Comes with LED indicators

Product Specification

• Brand: Alpine
• Model: BBX-T600
• Weight: 5.0 pounds
• Dimensions: 10.4 x 15.6 x 3.1 inches

Product Description and Performance

In case you are looking for the best car amplifier, then the Alpine BBX-T600 is the best option. With a sleek design and weighing just 5.0 pounds, it is easy to store in compact spaces. That said, the BBX-T600 is equipped with LED indicators. Consequently, you will be able to use the amplifier without any issues. The Alpine BBX-T600 works at a low voltage, i.e., around 14.4 Volts. Forthwith, you do not need to worry about overheating or short-circuiting issues.

Pros

• Excellent sound
• Compact and compatible
• Works on low voltage
• Comes with LED indicators

Cons

• Intense tension can break the Snap-on terminal
• You need to have technical knowledge in advance

05. Skar Audio RP-350.1D

Product Features

• 30 Amp of fuse rating
• The damping factor is more significant than 150
• Contains a remote brass knob
• 4-way protection circuit
• Offers high-speed power supply
• The working voltage is between 8.5 and 14.4 Volts

Product Specification

• Brand: Skar Audio
• Model: RP-350.1D
• Weight: 4.4 pounds
• Dimensions: 12/8 x 7 x 3.2 inches

Product Description and Performance

The RP-350.1D comes with a thermal, DC, speaker, as well as a voltage protection circuit. Hence, RP-350.1D became one of the most reliable and the best class D amplifier in the market. On the other hand, RP-350.1D also has a heat sink. Thus, the physical circuit will get additional protection from overheating. Lastly, RP-350.1D also has an in-built control panel. The control panel has an EQ switch located around 0, 6, and 12 decibels. 

Pros

• Has a wide frequency range
• The level range is around 6 decibels
• Offer 4-way circuit protection
• Comes with a heat sink

Cons

• Can only be used for vehicles
• The product is a bit costly

06. SMSL SA50 TDA7942

Product Features

• Compact design
• Aluminum shell for additional protection
• 24 Volt power input
• Original parts are in production
• Equipped with power indicator
• Offers protection from thermal overload

Product Specification

• Brand: SMSL
• Model: SA50
• Weight: 1.1 pounds
• Dimensions: 4.7 x 1.5 x 3.4 inches

Product Description and Performance

The SMSL SA50 TDA7942 is an ideal amplifier for home as well as office. In particular, SA50 has a stereo circuit design. Therefore it offers magnificent protection during strong output. Meanwhile, parallel 6600UF are installed to meet the ends during power peaks. As a result, you will get clear bass and treble. Despite several features, SA50 also has an eye-catching look. Accordingly, you can gift it to your loved ones.

Pros

• Excellent for indoor use
• Crystal clear bass and treble
• Easy to install and light in weight
• Equipped with aluminum casing

Cons

• Isn’t ideal for cars 
• Is not compatible with the subwoofer

07. Dayton Audio DTA-1 Amplifier

Product Features

• Reduce audio interference
• 88% audio efficiency
• Requires 8AA batteries
• Easy to mount on a wall
• Comes with a control knob
• Light in weight

Product Specification

• Brand: Dayton Audio
• Model:DTA-1
• Weight:1.1 pounds
• Dimensions:2.0 x 6.1 x 3.8 inches

Product Description and Performance

Notably, the Dayton Audio DTA-1 amplifier is in the market for the last 10 years. The DTA-1 amplifier reduces audio interferences as well as speaker pops. To be specific, the DTA-1 provides high sound resolution. Only 12% is lost during the transition. You can easily connect the amplifier with several hand-held devices viz. iPods, mobiles, tablets, etc. Finally, DTA-1 has six connecting ports, allowing you to connect several devices at a time. 

Pros

• Highly compatible
• Easy to operate
• Contain six connecting ports
• Do not require technical knowledge to operate

Cons

• This model is not compatible with Bluetooth

08. Behringer Europower EP4000 professional stereo

Product Features

• Equipped with an LED screen
• Contain a cooling fan along with an exhaust 
• Contain filters for noise modulation
• Chassis is made up of steel
• Work on electricity, no battery operation
• Introduced in the market in 2004

Product Specification

• Brand: Behringer Europower
• Model: EP4000
• Weight: 38.4 pounds
• Dimensions: 15.9 x 19 x 3.5 inches

Product Description and Performance

If you are looking for a heavy-duty amplifier, then do buy EP4000 professional stereo. EP4000 has a chassis made up of steel and contains a proficient cooling system. Thereby, you can use it ruggedly and do not have to worry about heating issues. The EP4000 works on 4000 Watt power, and it is ideal for music enthusiasts. You can use Behringer Europower EP4000 for live performances or during a weekend party.

Pros

• Highly durable
• Includes a cooling system
• Best for music enthusiasts and professionals
• Operates on PA system

Cons

• The product does not operate on batteries
• The product is a bit bulky

09. Ignite Audio Mono Block- 4000 Watts

Product Features

• Available since last 3 years
• 85 decibels of harmonic distortion
• 4 ohms resistance for 300 Watts
• Frequency range from 10 to 300 Hz
• It is adjusted manually

Product Specification

• Brand:Ignite
• Model:NA
• Weight:8.1 pounds
• Dimensions:13.7 x 2.1 x 8.9 inches

Product Description and Performance

The 4000 Watt, Ignite Audio Mono Block is ideal for oversized vehicles. Primarily, the Ignite Audio Mono Block 4000 provides a high volume range. Thus, you do not have to worry about distorted or background sounds while traveling through busy streets. Ignite Audio Mono can easily be installed inside of a car. Consequently, the air-conditioner of the car won’t let it get overheat. 

Pros

• Highly durable
• Provide clear sound
• Offers high volume range
• Easy to install

Cons

• Does not offer remote controlling

10. Power Acoustik RZ1-3500D

Product Features

• Equipped with an amplifier of 3500 Watt
• Creates 4 ohms resistance at 900 Watt
• Compact in size
• Works on analog features
• Compatible with iPods and mobiles

Product Specification

• Brand: Power Acoustik
• Model: RZ1-3500D
• Weight: 1.0 pound
• Dimensions: 16.75 x 5.25 x 2 inches

Product Description and Performance

Power Acoustik offers clear sound, and it is easy to store after use. You can place the amplifier in a rack or inside of a cabinet. This class D amplifier plays music from electronic devices and CD-ROM. Above all, the Power Acoustik can be used inside of a car or at home. Finally, this amplifier has a stylish design and do not get overheated quickly. Forthwith, you do not have to worry about any cross-circuiting incidences.

Pros

• Easy to install
• Stylish and compact design
• Do not get overheated quickly
• Deliver high power

Cons

• It doesn’t connect with a Bluetooth

Buying Guide of the best class D amplifier with Bluetooth

If you want to buy the best class D amplifier, it is essential to go through a simple buying guide. For starters, buying guides cover unbiased reviews about class D amplifiers. In that case, you get an idea about factors to focus on while making an initial purchase. Secondly, through the help of review guides, you will distinguish between two different amplifiers. Therefore, you will get to purchase a value product and save initial investment for a long time. This buying guide focuses on some of the crucial factors that make class D amplifiers competitive.

Compactness

First things first, you need to see it whether an amplifier is compact enough or not. For instance, the overall weight and dimensions of an amplifier play a significant role. Initially, you need to measure the place where you are planning to install the amplifier. It is advisable to buy lightweight amplifiers for your vehicle. Compact amplifiers are easier to maintain. Thus, you do not have to invest frequently in repair or replacement.

Compatibility

Before you buy the best class D amplifier, check for the overall compatibility. Notably, make sure whether the amplifier can easily be connected to mobile phones, iPods, and tablets. As an effect of this, you will be able to play your favorite music efficiently.

Thorough circuit protection

Generally, even the best class D amplifier is prone to short-circuiting. With that said, you do not want the equipment to damage mobile phones or record players. You can secure your investment and equipment by looking at the circuit protection policy. In most cases, amplifiers provide thermal, DC, speaker, as well as a voltage protection circuit. Such equipment is 100% safe, even when used by a novice. 

Ease of installation

You do not want to spend most of your time installing the new amplifier. Further, you also have to have the technical knowledge to install a sophisticated amplifier. In case sophisticated amplifiers aren’t installed correctly, they can lead to short-circuiting. Consequently, you may have to pay a hefty amount for repair and replacements. You can easily find several amplifiers in the market that work on the plug-n-play rule. 

Type of input

You need to know in advance whether an amplifier is Bluetooth-operated or not. Unlike Bluetooth-operated, wired amplifiers do not offer much transmission loss. However, you do not get comprehensive area coverage in a wired amplifier. At present, you can even buy amplifiers that have wireless as well as wired features. 

Cost

Indeed the cost of the amplifier is considered one of the most crucial aspects. Meanwhile, you also need to keep the shelf life of the amplifier into consideration. For example, if a product has a short shelf life, it is not wise to invest in it. 

Material used

The overall makeup of an amplifier enhances its life span. For this reason, you should buy the best class D amplifier made up of aluminum. All in all, aluminum is a sturdy metal and light in weight. Thereby, the amplifier can be used ruggedly and will be highly compatible. 

Power generated

You do not want to buy an amplifier that produces low-grade power. Whether you are planning to buy an amplifier for your home or vehicle does focus on power generated. High-powered amplifiers have crystal clear voices. Secondly, high-powered amplifiers also compensate for outside noise. Therefore, you get to enjoy your favorite songs without any hindrance. 

LED display

It is imperative to buy an amplifier with a LED display. Now you can easily regulate treble and bass. Moreover, LED display also offers on and off indicators. For this reason, you will be able to operate the amplifier without any hassle.

Exhaust fan

If you plan to buy a heavy-duty amplifier for live performance, then look for proper exhaust. In general heavy-duty amplifiers do get heated quickly. Forthwith it gets imperative to maintain the internal temperature. The exhaust system helps to keep the internal temperature and protect amplifiers from short-circuiting.

Mode of operation

In particular, you should buy amplifiers that operated on batteries and electrical sources. Using amplifiers that work on dual energy sources offers an upper hand. Now you can even use such amplifiers during remote camping or weekend picnics. 

Filters

Excessive electrical noise will affect the overall quality of sound. This is the reason why people prefer to buy amplifiers with filters. High-grade filters fix electrical noise offering clear beats and treble. 

Subsonic filters:

To begin with, subsonic filters reduce ultralow frequencies. Consequently, the workload of speakers and amplifiers reduces. 

Low pass filters:

Usually, these filters only allow frequencies to pass, which are below a pre-defined number.

High pass filters:

As per the name, this filter allows frequencies to pass, which are above the pre-defined number.

Wiring

Indeed, wiring plays a significant role in the overall performance of an amplifier. You need to emphasize the gauge as well as the wiring material. If thin or poor quality material is used, then it affects voice quality. In the short run, you may have to replace the amplifier altogether. 

Resistance

By and large, you can’t overlook the resistivity of an amplifier. Resistance is also referred to as impedance. The full, as well as mid-range speakers, have a resistance of 4 ohms. Meanwhile, you need to match the impedance of speakers and amplifiers. In case you use an amplifier of high impedance, then your speakers might get damaged. On the other hand, using amplifiers with low resistance will affect the output.

Headroom

During live performances level of frequency fluctuates to a great extent. That said, your PA may even suffer due to sudden musical peaks. Forthwith, you need to buy an amplifier that can deal with such fluctuations. More specifically, do buy an amplifier that has enough headroom. The higher the amp, the higher will be the tubes preset inside of an amplifier. Thus, the load will be divided equally, saving the speaker from damage.

Frequently Asked Questions for The Best class D amplifier

Why are class D amplifiers considered unique?

When compared to others, class D amplifiers have low energy loss. In effect of that, you will get the original sound quality. Proper maintenance of energy levels also saves your money on the electricity bill. Secondly, the best class D amplifier comes with the appropriate care of energy surges. Thus, the wearing of the machine and circuits reduces significantly. Now you do not have to spend a significant amount of money on frequent replacements.

How to pick the amplifier?

To begin with, you can buy from a wide range of class D amplifiers. Primarily, you need to emphasize the decibel and impedance. If you plan to buy an amplifier for a large room, then go with the heavy-duty amp. You should buy an amplifier up to 4 ohms for vehicles. Further, do see to it that the amplifier has a compact and sleek design. Last but not least, do go for an amplifier that has an exhaust system. Now the product won’t get heat up unnecessarily. 

Where should you install an amplifier in a car?

Firstly, your amplifier needs additional open space so that it can dissipate excess heat. In case proper free space is not offered, then the amplifier might get shut down. You can install the amplifier beneath the seat or in the trunk. Mounting the amplifier beneath the seat requires less wiring. Contrary to this, amplifiers mounted in the trunk are closer to the sub-woofers.

What should be the size of the fuse?

For a single amplifier installation, the size of the fuse should match the amplifier’s fuse rating. Conversely, you need to add the sum of fuses before installing more than one amplifier. For example, you want to install 2 amplifiers with 20 and 25 amps. In this case, just install a fuse of 45 or 50 amps.

Should you use a separate fuse block?

If the best class D amplifier does not have a separate fuse, then install a fuse block. You can take care of this situation with a fused distribution block. Thus, each amp will get an individual power line since it gets split from the main cable. If one of the amplifiers gets short-circuited, then the rest of the system won’t get affected. 

What are the Peak and RMS watts?

The RMS Wattage is a power capacity utilized to match and compare the components together. Contrarily, the Peak Wattage is twice the RMS value. Most of the time, the marketing department uses it to sell more amps. With that said, always consider the RMS Wattage while matching and comparing gears.

Can you add an amplifier to a car’s factory radio?

In most cases, the factory radio does not have RCA outputs. Henceforth, you won’t be able to connect the amp’s input. Moreover, you have to get the signal from the wires of the factory radio. You should buy an amplifier that has speaker-level input. But if your amplifier doesn’t possess such a feature, then use a line output converter. All in all, the line output converter lowers down the high input to the RCA level. 

What is the use of thin blue wire?

The thin blue wire is also known as turn-on leads. Specifically, the thin blue wire transmits a signal that turns on the amplifier. Besides, the thin blue wire connects the amplifier and receiver. This wire turns off the amplifier automatically when it is not in use. Henceforth, your car’s battery won’t get drained.

Why my amplifier won’t turn on?

First, you need to double-check the electrical wiring inside of a car. Then check the receiver and onboard fuses. Secondly, check if the power cable is connected properly between the battery and the amp. Thirdly, check whether the ground cable is connected to the metal chassis or not. Finally, see if the turn-on lead is connected properly or not. 

If the connections are correctly made, but the amplifier isn’t working, then remove the in-line fuse. After this, you should disconnect the turn-on lead. Connect the turn-on and positive terminal with the help of a short-length wire. Once connected, you have to replace the fuse. In case the amp comes on, this means that either the signal or turn-on wire is corrupted. 

Where should you ground the amp?

Notably, the thickness of the ground and power wire should be the same. The wire should be in contact with the car’s chassis. Initially, you need to scrape off any paint or varnish from the chassis. Then you must fasten the electric wire to the bolt. You can ground the wire properly with the help of a star washer. 

What is speaker impedance?

As discussed above, speaker impedance is very important while attaching an amplifier to it. For bridged channels, use up to 4 ohms of impedance. On the other hand, for individual channels, use 2 ohms of resistance. When you use an amplifier of high resistance, then it can damage the speaker. Conversely, a low impedance amplifier affects the output quality.

What is bridging?

In short, bridging is a process of combining 2 or more amplifier channels into one. Thus, you will get more power and high voice quality. People bridge amplifier channels together during a party event or live performances. However, you can’t bridge a mono-amplifier since there is only one channel. 

How to fine-tune the bass settings?

All in all, the best class D amplifier is used to offer crystal clear beats and voice quality. There are a few basic steps to fine-tune the bass of an amplifier. You have to turn off the tone and EQ present. After this, disengage all the filters in the amplifier and set the bass to zero. Play some music and raise the volume till the voice gets distorted.

Meanwhile, you need to increase the amp’s gain and bass till some distortion is heard. At last, adjust the EQ on the receiver. Eventually, you will listen to music with the desired bass quality.

Total power you require to optimize the amplifier for the car?

Usually, every car has a different stereo system. Therefore, there is no rule of thumb to optimize the amplifier in particular. However, check the sensitivity of your speakers. Most of the efficient speakers can withstand up to 90dB. Likewise, you can increase the sound of the speakers with the help of sub-woofers. As discussed above, you should also give importance to the wiring of the amplifier and speaker. Make sure that the wiring material is of top quality. Similarly, the wire should be thick enough to withstand high voltage.

What is the significance of the amplifier’s power?

You should purchase a high-powered amplifier for live performances. Meanwhile, it is essential to pick a stereo that has resistance matching that of the amplifier. Last but not least, the power supply directly influences the operating cost. Stick to the electric amps. This is so because battery-operated amplifiers cost more.

Conclusion

To summarize, class D amplifiers are considered a modern marvel for music enthusiasts. Unlike their predecessors, these amplifiers have upgraded circuitry. Due to this, they offer high-quality beats and treble. Most importantly, you can buy the best class D amplifier that is operated on battery and electricity. Similarly, these amplifiers are based on wired as well as wireless technology. Thus, you get to play music from your iPod, mobiles, or CD-ROMS. 

Before you pick the best class Damplifierfor your stereo, it is essential to go through a genuine buying guide. You get to know about the most important factors to focus on during the time of purchase. For instance, you should give more emphasis to the ease of installation and compatibility. In addition to this, amplifiers also need to have proper headroom, resistance, and exhaust system. Lastly, before buying, check whether the amplifier offers duly protection from cross-circuiting or not.