What is the meaning of PMPO in sound and how to calculate the watt from PMPO
This term refers to the maximum power output achieved for a speaker system under perfect conditions. PMPO is a controversy term, as many feel it is used as a marketing ploy, since the perfect conditions on which PMPO are based are next to impossible to achieve in a home where the speaker system is set up. The PMPO of a speaker is actually based on the maximum power output in a very small period of time (microseconds). Since no musical note lasts for such a short amount of time this peak performance cannot be reproduced in real usage of the speaker. The PMPO value is often seen listed as "watts PMPO" on product packaging. PMPO is also called peak music power output.
The alternative to PMPO is RMS (Root Mean Square), which is an accurate mathematical representation of a speaker's power output, measured ov ...more
The true power output of an amplifier can be estimated by examining the input current. Linear amplifiers tend to be about 60% efficient at best. A switch-mode amplifier (known as class D) can achieve much higher efficiency, sometimes as high as 95%. A linear car amplifier labeled "500 W PMPO" but fitted with a 5-amp fuse can, at most, deliver an average power of 5 A 14.4 V 60%, or about 43 watts. (100% efficiency is always used for PMPO)
P.m.p.o. is the abbreviation for peak music power output and is the peak, instantaneous (non repetitive) power which an amplifier can produce.
There is no standard relationship between average and p.m.p.o. It will depend upon thecharacteristics of the particular amplifier's power supply.