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Average consumers often weigh heavily on cost versus power rating of audio amplifiers as their basis for purchasing one. Depending on the marketing strategy, the power rating methodology for audio amplifiers can vary from manufacturer to manufacturer. The purpose of this document is to clarify three commonly used power ratings: average power, peak power, and PMPO. The following Texas Instruments PurePath Digital-- power stages will be used for power measurement: 7 TAS5142--4 half-bridges (2 BTL channels or 4 single-ended [SE] channels) 7 TAS5152--4 half-bridges (2 BTL channels or 4 single-ended [SE] channels) 7 TAS5186--6 half-bridges (6 single-ended [SE] channels)