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RE: Look...

A perfect equalizer also does not distort a signal. Like a perfect amplifier, it is a linear system. If a good recording of two instruments is passed through a perfect equalizer the tonal quality of each instrument may be affected, but the perfect equalizer will keep the sound of each instrument separate. The sound of each instrument will not be subject to intermodulation distortion as a result of the other instrument.

Peter's posts illustrate some of the difficulties of measuring distortion. This can be daunting, but that is not surprising. If a test environment and test equipment are not at least an order of magnitude better than the equipment being measured, accurate measurement will be difficult to obtain. This is a general problem of any physical experiment, not just with audio.

I don't believe the present round of posts has adequately addressed the question of whether cables introduce non-linear distortion to audio signals passing through them. If there are articles available for free download that address this issue, I would be interested in reading them.

Tony Lauck

"Perception, inference and authority are the valid sources of knowledge" - P.R. Sarkar

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