Some of you may know of PS Audio Paul McGowan's daily missives about various audio topics. He has been writing recently about amplifier power supplies [an excellent long series breaking down the relative merits of linear and switching power supplies], leading in to his recent topic about amplifier power.

Today's post, titled

*Music Math*, is especially interesting, because it summarizes the math about amplifier power reproduction of sine waves, spoken language, and music:

**Quote:**Our musical math would then show us if we need 50 watts to reach 90dB, we need 10 times that amount to reach 100dB! That’s right, do the math. For a 90dB pair of loudspeakers to produce 100dB peaks in your room without clipping the amplifier, you need 500 watts of power.

And then Paul turns to the natural question that any of us on this forum might ask:

**Quote:**Many of you are asking me if all this is true, which it is, how come my little 10 watt SET amplifier works just fine on my speakers? Are tubes so much better at peaks than solid state that I am getting away with something?

Looking forward to reading that tomorrow.

It should surprise no one that PS Audio is working on an all-new series of switching amos, and so these posts serve a commercial purpose, but they are interesting and I commend them to anyone who might find the topics enjoyable.