What is RMS Power?

On the box for my brand new 120 Watt Crate GTD120 amp it say:"120-Watts RMS Power Output".

What does this mean?
The in one piece thing?
The RMS Power piece?

Answers: The link below lead to a very readable and entertaining but still artistic article on amplifier power. There are those who argue that RMS (root-mean-square) power is meaningless, and it may be, but it is certainly a more natural figure than PMPO (peak music power out) or PMP (peak music power). There hold been other "power rating systems" such as instantaneous power out (if I call in the term correctly) that are as meaningless. Another meaningless length is watts in dB. A dB is not a device of power, it is a unitless measure of gain. If you don't know the mention level the dB power have absolutely no substance. You will find that RMS power is usually very close to average power. Average power is undeniably a good determine because it a measure of power over a enduring time. Please read the article then remember that dispite the authors personal distaste for RMS, it is still a much better system than most.

Used to be (long, long ago) that every businesswoman measured their equipment's power in different ways to acquire the best sounding numbers. Some measured peak power, which be unsustainable over extended time, while others only measured a small part of a set of the sound reach and then extrapolated the numbers to nouns better.

RMS, which actually vehicle Root Mean Square, is a trigonometric way to convert varying values into a more 'average' continuous value. So, necessarily, it's more of an average performance to compare next to other products' average performances.

And it's total power, so 120 watts from a stereo is really 60 watts from the left trench and 60 watts from the right channel.

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