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RE: Long-term DBT example

You will notice in the stereophile article, Andy, that even though he concludes there is no such thing as "euphonic" distortion, he also points out that some kinds definitely sound worse than others.

This is the point I think Rick is trying to make, that this circuit simulates the "less worse" kind of distortion, meaning primarily even-order, while not addressing what is generally considered the worst kind of distortion, namely odd and/or crossover distortion, which plagues nearly all Push/pull (or complementary if you prefer) Class A/B amplifiers.


I used Keith Howard's software to generate a cd with solo violin with differing amounts of distortion and I based the type and level of distortion on 1Khz harmonic measurements that I found in STereophile and Soundstage. The result? The undistorted was the best followed by amps that are generally consdiered to sound excellent (eg. Lamm). Obviously it was not double blind so I don't want to claim too much but to me the small amount of added distortion was clearly audible.

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