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# In power terms what does RMS refer to, eg., when buying some small speakers you find they are 5W RMS?

Question #81886. Asked by Lympathy. (Jun 13 07 6:54 AM)

shawn888

In mathematics, root mean square (abbreviated RMS or rms), also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity. It is especially useful when variates are positive and negative.

http://en.wikipedia.org/wiki/Root_mean_square

The uses are given in the link.

 Jun 13 07, 7:44 AM

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