How does one test the wattage output of an amp?

[nuttcase21 10+ year member]

I'm assuming you need to have a regulated, variable power supply to power the amp from, run a specific test tone through it, and have a clamp meter measuring amps and a volt meter measuring voltage at a dummy load of 4 ohms? this sound right guys?

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[thch 10+ year member]

you should also use an oscilloscope or spectrum analyzer to determine harmonic content of the output, to ensure the amp is not mis-rated due to it putting out 80% THD.

 

[smd4life 5,000+ posts]

with a wattages output checker

 

[nuttcase21 10+ year member]

good point thch. now, where to find an o-scope...//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif