Article How to measurement class D audio amplifier output waveform?

Customer is using audio precision to measure output power on MAX98357 OUTP and OUTN. The output power should be 1W above.
But audio precision shows 139mW, but speaker is very loud.



When we measure OUTP and OUTN on customer board, I get below waveform:




A:

We usually add a filter to filter Vout when measure output power.


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