A good example can be shown in carsound.com's reviews section. If you look
at one of the amps that Pug cited as "bad" (Jensen) and compare it to one
that he cited as "good" (Zapco), you'll see in the charts that the THD
measurement on the zapco was greater.
http://www.carsound.com/reviews/amps/ag1000chts.html
http://www.carsound.com/reviews/amps/ats50rxchts.html
But, as you've pointed out already, nobody's going to hear the difference
between 0.05% and 0.2% THD anyway.
Good example. And you can find similar charts from just about every
manufacture. From Brax and Zapco to Jensen and Pyle.
But some people just want to believe that they can hear the sound difference
when there is not one. It just kinda bursts thier bubbles.
Les