07-Jul-2019, 14:44
@RebelMan: To be frank, a lot of what you wrote above doesn't make much sense to me. For example:
* What is the distinction you're drawing between "clean" and/or "linear" power and any other kind? Power is a well-defined, single, measurable quantity so in itself it can't be clean, dirty, linear or non-linear. Maybe you are talking about distortion instead.
* Why does it matter "at what load" the power was measured? Power is power.
Your argument based on the loudness of an 85 dB/W (at 1m?) speaker driven by a continous 350 W (RMS) would be valid. But that is not the point: the video is talking about instantaneous power needed to drive the speakers with a faithful signal at music peaks. @Confused helpfully made that clear by quoting the description of the power meters from CH Precision's documentation.
What this discussion revolves around is the crest factor of the music being reproduced. For some uncompressed music this can be over 20 dB, meaning that to reproduce the full dynamic range of the music the amplifier needs to have more than 100 times as much power available (for peaks) than the average (RMS) value for a given volume. This is a good article that goes through the maths.
* What is the distinction you're drawing between "clean" and/or "linear" power and any other kind? Power is a well-defined, single, measurable quantity so in itself it can't be clean, dirty, linear or non-linear. Maybe you are talking about distortion instead.
* Why does it matter "at what load" the power was measured? Power is power.
Your argument based on the loudness of an 85 dB/W (at 1m?) speaker driven by a continous 350 W (RMS) would be valid. But that is not the point: the video is talking about instantaneous power needed to drive the speakers with a faithful signal at music peaks. @Confused helpfully made that clear by quoting the description of the power meters from CH Precision's documentation.
What this discussion revolves around is the crest factor of the music being reproduced. For some uncompressed music this can be over 20 dB, meaning that to reproduce the full dynamic range of the music the amplifier needs to have more than 100 times as much power available (for peaks) than the average (RMS) value for a given volume. This is a good article that goes through the maths.
Roon (Mac Mini), Wilson Benesch Full Circle, Expert 1000 Pro CI, Kaiser Chiara
Warwickshire, UK
