Amir is a good resource as an alternative viewpoint. His ‘truth’ is a series of measurements, that can tell a lot about how some components will perform. But he does miss some of the picture no doubt. A couple of his component reviews are way off the mark. Maybe a faulty product? Or his measuring system at fault? Who knows? Take Audio Science Review for entertainment value, and some worthwhile information.
The problem was not Amir himself but few of his zealots disciples...
Because the notion of a measured distortion in engineering design is not the same than in acoustic...
Why ? Because acoustician test a subjective response from a musician for example in a timbre experiment perception test...harmonics here means something very different than " harmonics" in engineering standard measures...
And the engineer read a dial and his "distortion" THD is a way more simplistic concept of what a distortion do to the subjective impressions and why....It is an engineering % about a relation between input and ouput...Not the way sound affect humans ears...
Electronic Engineering is SUBORDINATED to psycho-acoustic research or a tool for it not the reverse ... Save when the psycho-acoustic research is done and applied....
Timbre perception is not reducible to a simplistic concept of the spectrum for example....but the engineer most of the times work with this simplistic concept which is well enough for his design trade-off practice anway ... There is exception but they are exceptional designer not a crowd of them ...All audio products are not ultra high end... 😁😊
Atmasphere has numerous posts about amplifier harmonic distortion and listener perception. Simply stated, vanishingly low harmonic distortion is not necessary. The harmonic spectrum and linearity of the distortion are more important. So whether THD is .001% or a hundred times greater is pretty irrelevant. Clearly measurements matter, it’s just that the most commonly cited amplifier measurements aren’t the most important regarding sound quality.
Exactly....Some designer like atmasphere know....