Amplifiers are an important part of our daily lives. They move the majority of the speakers and affect the sound quality directly. Typically, amplifiers enhance the power of weak signals and make them more powerful. In turn, full and clear sound is produced. Several types of amplifiers are available and are grouped in classes based on their qualities, potential, and applications. An example is the Class A, AB, and D amplifiers. The Class d technology or amplification is loved by many due to its high-efficiency levels, making it stand out from the rest. Whichever kind you choose, picking the right one is vital. We discuss the amplifier buying guide below.

A Guide for Buying Amplifiers

The vast selection of amplifiers can make the buying process challenging. Below are factors to consider when choosing an amplifier.

1. Power rating

It refers to the amount of power an amplifier can produce at a given time. Power rating is divided into two; peak power and RMS power. Peak power is the maximum power produced within a short time before any damage occurs. RMS or root mean square refers to how much power an amplifier can produce continuously and comfortably.

The peak power is mainly indicated using large figures like 2500 watts, but these devices don’t get to such amplification levels in most cases. It may be a marketing strategy; thus, it’s essential to watch out before buying. Always check the RMS power rating as it truly defines how the amplifier will perform.

2. Impedance

It is also labeled as Ohms and is the amount of resistance added to a circuit by a speaker. As a buyer, considering the impedance levels is crucial as it determines how compatible the amplifier is with the speaker. Having equal impedance from both amplifier and speaker devices helps give off the right amount of power output.

If the amplifier resistance is more than that of the other equipment, it is forced to produce more output, resulting in a damaged unit since it’s going beyond its limits. On the other hand, if its resistance is lower than that of the speaker, the general output will be low, and poor sound quality will be evident.

3. Signal to noise ratio

It is measured in decibels and is the ratio of signal power to that of noise. It is used to indicate the amount of background noise produced by an amplifier. When listening to music through a speaker, you want minimal to zero background noise to enjoy it. Speakers that give off too much noise show that the signal-to-noise ratio is low, while those with no noise have a high signal-to-noise ratio. Consider buying an amplifier with the highest ratio, meaning the specifications are excellent.

4. Amplifier class

Different amplifier classes have different circuitry. Each class has characteristics that vary from one to the other, as well as benefits and drawbacks. Determine your priority, for example, high audio quality, high efficiency, and select the class that offers what you want.


Getting the right amplifier enhances sound quality either in your home, office, place of worship, or public gathering. Research extensively on the kind you want and that which fits your needs. Take note of the above tips and buy an amplifier that functions properly and can last you longer.


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