Best Subwoofer Plate Amplifier [2024 Review]

A plate amplifier is a small and light amplifier. It is made out of a metal sheet that is connected to all of the ports and controls. It is usually located on the back of a stereo speaker or subwoofer, and they are pretty much needed for every audiophile. They can also act as the device’s built-in amplifier.

In this best Subwoofer Plate Amplifier review, we listed some of the best products available on the market. We will explain their features and functionalities and decide on the best amps in terms of quality and performance.

If you are interested in these models, keep reading our best review article. Without further ado, let’s explore their features and try to find you the best subwoofer plate amplifier.

Our Top Pick: Dayton Audio SPA1000 1000W Subwoofer Plate Amplifier

Features of Dayton SPA1000

Dayton Audio is a well-known manufacturer of sound devices. It creates high-quality items that withstand the longest in the market. One such device is the SPA1000 subwoofer plate amplifier. It is a cutting-edge gearbox amplifier that takes the best characteristics of Class G, Class D, and Class AB amplifiers.

Dayton Audio SPA1000 has Class G circuitry with the high-fidelity functioning of a Class AB amp. It also has a proprietary tracking down conversion power source that boosts efficiency to 86%. This means that you get unrivaled Class D-like performance with no difficulties with durability and great sound.

The Class AB output signal ensures distortion-free sound without the unpredictability that most high-efficiency amplifiers suffer from. The proprietary circuitry of this American-designed and constructed amplifier constantly tracks the input signal.

It takes it to modify or adjust the voltage available to the output stage. This tracking capacity delivers a precise amount of energy. This energy is delivered based on demand rather than maintaining it in reserve all of the time. This feature ensures that the output stage only pulls the power that is required at any one time.

More power is available for the subwoofer driver since less energy is wasted as heat. The SPA1000 is an improvement over previous models in terms of heat management, making it an almost bulletproof amplifier for today’s extremely HT audio and music-playing situations.

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There are several subwoofer amps on the market, but only a handful of amps are being produced for home usage. Plate amps often necessitate the addition of a sealed portion to the subwoofer box for optimal performance. Otherwise, they could be damaged by being shaken or air pressure could be driven out of switches.

Dayton is an excellent amp to be used at home or studio. The choice is yours and this machine can serve you well. It offers some very useful functions in addition to the conventional phase, volume, and crossover frequency controls.

Pros & Cons of Dayton SPA1000

  • High power Class-AB output
  • Patented tracking downconverter power supply
  • Toroidal power supply transformer
  • Low-frequency parametric EQ
  • Advanced soft clip circuitry
  • Nothing much

Runner Up: Dayton Audio SPA250DSP 250W Subwoofer Plate Amplifier with DSP

Features of Dayton SPA250DSP

The digitally processed plate amplifier from Dayton Audio, the SPA250DSP gives you complete control over your whole system. This one-of-a-kind amplifier enables you to fine-tune your program’s poor performance while also providing high-pass protection for your main supply.

This amp works against harm sustained by over-excursion. Dayton also stands behind its products, and their warranty proves dedication to quality and dependability. The Dayton Audio SPA250DSP plate amplifier is a solid performer for sure and can be used at home or in the studio.

Seven PEQ bands, a low-pass filter, a high-pass filter, a subsonic filter, a phase control, a limiter, and a mains delay are among the DSP features. It has a Class D circuitry for reduced superior efficiency.

For flexible connectivity, the SPA250DSP provides different balanced and unbalanced line-level inputs and outputs. It contains PC-based GUI software that is quick and clever, allowing easier access to the DSP functions.

With special PC software used in the amp, it has a USB controller for PPC-GUI interaction. For the convenience of usage, it incorporates a single-knob control center so everything will be easy for you to control and adjust for the better.

Dayton has done a good job with this amp but some stuff is missing. This amp can only be controlled by downloading the program and connecting it to your computer through a USB cable. However, you will see that there is no USB cable included in the package.

The back wire, which is red and black, is too short and you might need to add some more cables. It will get difficult to get behind the sub and connect the wires to the terminals because to get behind the sub and connect the wires to the terminals is hard. This is a problem if you have a deep box or use the surface mount bracket.

Pros & Cons of Dayton SPA250DSP

Best for Budget: Sound Town Class-D Plate Amplifier STPA21-710

Features of Sound Town STPA21-710

You may use the Sound Town Class-D plate amplifier to create your powered subwoofer box. Two XLR-1/4” combo inputs and two XLR outputs are included in the STPA21-710 power amp.

It can take a 500W RMS of electricity. The amp’s speaker outputs both produce 125W RMS power, allowing you to attach two passive PA speakers to it. It has also a polarization switch, a master volume control, and a low-pass filter modification.

The amp only works at 8-ohm impedance, has 1% THD and power consumption is 30W. The impedance of the amp is 8 ohm. The plate amp works with both 8-ohm and 4-ohm speakers. 

Based on the power output, the Sound Town STPA3L-400D may work out, but please double-check if the dimensions of the Sound Town plate amplifier (6.46″ x 3.54″ x 16.54″) can fit your system. Also, the internal dimensions of the amp are 10.7 x 7.2 x 2.8″.

Keep in mind that some subwoofer’s back hole might be too small for this plate amp, so you will have to extend it somewhat. But, with a little elbow grease, you will be able to get your subwoofer up and running for less than the cost of a replacement part – and far less than the cost of a new subwoofer. 

This amplifier has good specs and is simple to set up and install. You can use Sound Town Class-D Plate Amplifier STPA21-710 to make a guitar FRFR combo amp. It operates silently and does not interfere with the signal.

It is well-built, and everything seems to be working nicely. However, providing product documentation either in the box or on their website would be a better way for customers to get the technical data they require.

Pros & Cons of Sound Town STPA21-710

  • 500W RMS plate power amplifier
  • Two speaker outputs with 125W RMS
  • Over current and short circuit protection
  • Sturdy and reliable
  • Includes both balanced and unbalanced line-level inputs and outputs
  • Power might be too low for some powerful speakers

Why do you Need the Best Subwoofer Plate Amplifier?

A shallow-frame amplifier installed on the back panel of a speaker or subwoofer is known as a plate amplifier. It is a power amplifier that is mounted behind a speaker on a flatboard or sheet metal.

It functions similarly to a standard amplifier in that it accepts a line-level input and amplifies it to power a speaker. The only distinction is that it has a low resonant frequency, making it perfect for driving subwoofers.

It is required to be installed inside a subwoofer’s container. The majority of ready-made subwoofers have built-in amplifiers. However, if you want to make your subwoofer, you will probably need the best subwoofer plate amplifier.

Cutting a hole in the back wall of the sub and screwing the plate amp to it is the best approach to mount a plate amp to it so we recommend doing so.

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How to Buy the Best Plate Amplifier for Subwoofer?

When selecting a Plate Amplifier, many factors must be examined, including the source, price, functionality, and warranty, among others.

Amazon is the greatest online store for purchasing electronics. It took a long time to build up such a reputation. The online store has established itself as a reliable source due to its consistent reliability and concern for both clients and suppliers.

That is the reason why we recommend shopping from Amazon if you are looking for the best subwoofer plate amplifier for your music system.

What to Look for When Buying the Best Subwoofer Plate Amplifier?

Plate Subwoofer Amplifiers are available in a variety of sizes and styles. When buying one, you should think about the intended purpose as well as your budget. The items listed below will assist you in purchasing the best one.


We know the first thing you look at in a product is its price so the price is the most important thing. Prices may vary by brand, size, and picture quality specifications on Amazon. Before making any purchase, you must consider the pricing aspect.

You can evaluate two brands and models that are offered at varying prices from this point. Verify that the price is reasonable during your search for the best subwoofer plate amplifier. Multiple services can charge different prices for the same goods. Amazon allows you to compare merchants and purchase items at a discount.


Many amplifier brands can be found on Amazon. Samsung, Sony, Vizio, TCL, and Hisense are some of the most popular brands so you should consider buying one of those brands. Some manufacturers are known for producing the greatest Plate Amplifier while others are not.

To know which brand makes the best amplifier, you need to do some research. Luckily, we composed a list for you to ease your job. Some brands are also noted for their long-lasting durability and performance.

Some are recognized for making long-lasting performance, whilst others are known for their QLED technology. This technology ensures a high-quality display on the amplifier. Various brands have improved Plate Amplifier as a result of the increased usage of technology.

Long story short, know your brands and look for the ones that can offer some nice features when you are buying the best subwoofer plate amplifier.


Check the warranty offered by the manufacturer. A longer warranty period provides you with added peace of mind and protection in case of any defects or malfunctions.

When the product fails to perform properly under the warranty, the manufacturer will take it back and replace it. Different brands have different warranty periods so check them out to see it for yourself.

Conclusion: Best Subwoofer Plate Amplifier [2024 Review]

Modern Subwoofer Plate Amplifier enables convenient streaming of music and movies, as well as the monitoring of video games and even work. Long story short, you will probably need the best subwoofer plate amplifier for many things in your life.

We tried to include different kinds of subwoofer plate amps for people who might need different things. There is no poor choice in our list so you can give any of these best subwoofer plate amplifiers a chance.

Overall, these three are the best subwoofer plate amplifiers that are being sold on the market today. Make sure you try them out before buying so you know what to expect. We hope you liked our review!

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