What is the difference between watts RMS and PMPO and what do each mean?

What is the difference between watts RMS and PMPO and what do each mean?

The watt difference between RMS and PMPO can be summarized as RMS is used to obtain output power values; PMPO is a term used extensively in advertising.

 

Root mean square (RMS) in English: Root mean square is a measurement method for estimating the size of the output power. This is the most accurate way to make such measurements. RMS is also known as the mean square, but in this case, it is used to measure the power of the amplifier. This criterion is used in conjunction with the electrical efficiency of an electric amplifier, and is a method of measuring the average (or average) output power ratio relative to the average (or average) input power.

Peak music power output (PMPO) is a term often used to promote the sound quality of an amplifier output. This term is not quite precisely defined, however it is thought to be the sum of the maximum power consumption of the amplifiers in an audio system. Because this phrase is a little baseless and not contracted in a definite way, its definition changes as the PMPO rate changes relative to the output power. The best way to measure PMPO is to check the input current.

Simply put, RMS is the square root of the square mean of a set of values ​​- centered on a continuous time waveform. This value, as one, is as follows:

 

This formula has several modes that define RMS for waveforms, all-time defined functions, electrical power, and amplifier power efficiency.

PMPO should not be confused with maximum instantaneous output power (which has the same abbreviation). The two have different characteristics, and are therefore measured separately. Therefore, the two can not be converted to each other, that is, the maximum output of music can not be converted to the maximum output power of the moment. For people who are professionals in this field, to define the power of an amplifier, this phrase is meaningless and confusing. PMPO can only be accepted for a short time, without causing serious and sometimes irreparable damage to the amplifier.

RMS is used very effectively in calculating power (for example, the voltage observed in a power outlet). Due to the variety of interpretations of this formula, the maximum values ​​are also calculated by RMS, and the signal outputs can be calculated by RMS as in the above equation.

Summary :

RMS is used to obtain output power values; PMPO is a term used extensively in advertising.