What is the RMS power of the speaker in 2 minutes? What effect does it have on sound? How to choose?

When we purchase speakers, we often see the RMS power parameter. What does it mean? What kind of sound does it have? What is the appropriate RMS power? Today, the author will make it clear to you once and for all.

1、 What is RMS power?

First of all, RMS power refers to the maximum power that the speaker can continuously output within a specified time (usually one hour) without distortion or damage. It is an important indicator to measure the power of speakers, representing the actual drive Ability.

2、 What is the difference between RMS power and PMPO power?

In addition to RMS power, there is also PMPO power. PMPO power refers to the maximum power that the speaker can withstand in an instant, but it is not the power that the speaker can continuously output. Generally, PMPO power is about 8 times (or even more than 10 times) of RMS power.

Therefore, although the PMPO power value seems to be very high, it cannot be output continuously in fact. It is only a theoretical peak power reference and cannot be used as the main basis for judging the actual performance of speakers.

However, businesses usually mark the PMPO power of speakers on the product e-commerce details page, because it is larger and more attractive to consumers. However, in fact, the reference value of PMPO power is not great, because it is impossible for speakers to continuously output PMPO power in actual use.

3、 How to select the power of speakers?

When purchasing speakers, RMS power shall prevail. Generally speaking, the RMS power of speakers used in the living room is between 20-100 watts. If the room area is large or you need to play high volume music frequently, you can choose a more powerful speaker.

Here are some suggestions for selecting speaker power:

Room area is less than 20 square meters, recommended RMS power: 20-50 watts
Room area is 20-40m2, recommended RMS power: 50-80W
Room area is more than 40m2, recommended RMS power: more than 80W

4、 Room condition

Carpets, curtains, etc. will absorb part of the sound energy, and the more enclosed the room, the higher the power required. On the contrary, if it is hard ground and smooth wall, the power demand can be appropriately reduced.

5、 Misunderstandings about RMS power: "The higher the RMS power, the better the sound quality of the speaker"

This is not entirely correct. The sound quality of the speaker depends not only on the RMS power, but also on the specifications of the sound generating unit, frequency response range, distortion, signal to noise ratio and other indicators of the speaker.

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