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RE: Slew rate, TIM hogwwash

> As to evidence contra to this, Otala (and others) published two JAES
> papers ... In the first paper a group of six of the most sensitive
> subjects (from a previous test of 68 listeners) were tested and it
> was found that "The results show that in certain passages of music,
> 0.003% of distortion is clearly audible".

> As Otala has performed tests demonstrating that TIM in transistor amps
> is audible and that it can be detected down to a level of 0.003% by 6
> out of the 68 listeners in his test group ...

6 out of 68 is a really poor sampling, on the level of a statistical error. While TIM theory looks profound, real audibility is an open question. Its a common behavior in human society to raise a problem (often miniscule or even non-existent), in order to develop and sell "unique solution". BTW, TIM issue was widely used in advertising material back in 198x.

I own two amps engineered to minimize TIM (Sansui G Pure DC series). They sound great. I heard, had (and built myself) others, solid state and vacuum tube, which design don't take into account TIM at all. They also work great.

Thus, I assume, TIM made more noise by itself rather to contribute anything useful.

Edits: 07/12/17

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