Everything you need to know about RMS’s colossal power

You almost certainly own an audio system and speakers or are considering purchasing a new set for the computer or audio line, and it is for this reason that we have decided to give to you, in this article, all you need to know about RMS power in order to make an informed choice.

You may have heard of RMS power, but it is not quite obvious what it means or how it benefits you when shopping for new speakers. While the majority of manufacturers describe RMS power in watts and others use the term “peak power,” let us look at how this information benefits you and how to understand it.

What is the speaker’s RMS power and how is it interpreted?

The phrase RMS power is derived from the English,Root Mean Square, and refers to the amount of power that a speaker may output consistently without distortion, but which occasionally reaches peak values of up to two times the RMS value. It is measured in Watts and you have the manufacturer’s specified values for the RMS power.

For example, a speaker with an RMS power of 30 W and a peak power of 60 W has an average power of 30 W and may emit specific sounds or groups of sounds at a peak strength of 60 W, but these sounds may be distorted or even noisy at peak power.

Thus, it is critical to know the RMS power rating of a speaker, which is the average that you can listen to without distortion, since if you use it at a greater power, irreversible damage to the internal components may occur.

Everything you need to know about RMS's colossal power

What is musical power?

When we speak about musical strength, we are not referring to volume. You must understand how loudness is measured, specifically in decibels, in comparison to power, which is represented in watts. As decibel examples, we may consider whispered conversation at 30 dB, automobile traffic at 85 dB, and train sirens at 90 dB. Anything beyond 90 – 95 dB, when exposed for an extended period of time, can impair hearing.

Musical power is the amount of electrical energy that a speaker can tolerate in the presence of a pink noise input signal (a sound that resembles a musical theme) without sustaining irreversible harm.

However, if you do not know the power of the speakers, this power is subjective, as it is based on the nominal value provided by the acoustic impedance. As a result, you cannot depend on this number alone; additional data must be gathered.

What is the maximum power?

Another often used statistic by manufacturers is the peak power output, PMPO (Peak Music Power Output). This is the maximum amount of power that the speaker can deliver without self-destructing. Often, this figure is only a marketing declaration by the manufacturer, but the value you are interested in is the RMS.

For instance, a bulb may have a maximum output of 100 W but an RMS output of just 10 W.

Everything you need to know about RMS's colossal power

How do you know which speakers to choose?

These concepts are founded on a variety of mathematical computations that quantify distance, volume, and power. It will not be long until we get at the final results, and in the meanwhile, we will quickly discuss many concepts of interest:

  • Volume calculation – while creating a bespoke acoustic system, it is critical to calculate the volume accurately to ensure that the sound is spread uniformly and does not distort. This computation is done based on the type of speaker, and specialist software is used to do it. It is simple to use and assists you in determining the loudness of a subwoofer, for example.
  • Calculating the power required to create a standard sound at a specific frequency that does not cause overheating in an enclosure is done by measuring the amount of electricity required to generate that sound. Additionally, it is referred to as nominal power.

Additionally, the watts to amperes conversion, despite the fact that they represent different sizes (power, correspondingly current), relates to the calculation of the conductor section, i.e. the cables for the acoustic enclosures, required for a certain nominal power. You can simply locate them in the conductors section’s calculating tables.

Another phrase worth noting is speaker sensitivity. This is the mechanism through which a speaker transforms the electrical energy received from an amplifier to acoustic energy. Consider a more specific example relating to sensitivity – 2.83V / 1m – 90 dB, where 2.83V is the amplifier’s output, 1m is the distance at which the measurements were taken, and 90 dB is the acoustic level. As a result, there is a strong connection between distance from power and power.

Other musical words may be of interest if you are in the market for a high-performance audio system.


What does Hi-Fi imply (high fidelity, accuracy, and refers to the speakers’ capacity to reproduce sound as closely as possible to the source); what is impedance (the resistance of the speakers to the current supplied by the amplifier); and so on.

The more information you have, the better equipped you will be to select speakers that are appropriate for your needs. The connection between impedance and power is inverse; when impedance is low, power is raised; when impedance is high, power is decreased. Impedance is expressed in ohms, and even when a range of values is present, only the average value is sent (4, 6, 8 ohms, etc.).

In conclusion, selecting a high-performance audio system is not straightforward, but if you are well informed and understand all the words used, it will be much easier to avoid being duped by manufacturers, some of whom offer material just for marketing purposes.

On an active speaker, you will find information about the volume, power, frequency, dimensions, and power supply, which you will select based on the source to which you are connecting it. Now that you understand what RMS is and how to perform various calculations, you can better comprehend the manufacturer’s specs and pick what is best for you.


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