On Sat, 01 Aug 2015 18:29:58 -0700, Phil Allison wrote:

** A single sine wave is needed for audio power testing.

Amplifier power ratings are based on the *rms* value of a sine wave -
hence the misleading term "rms power".

Well that would make sense with RMS being, IIRC, equivalent to the DC
heating effect in a resistive load.