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Posted by Lew (A ) on July 28, 2021 at 17:19:50

In Reply to: RE: I think you'll find that posted by s.etal2@juno.com on July 26, 2021 at 10:20:37:

They wrote, "Where phono stages, as part of their signal amplification, will have a constant resistive input impedance, Step-Up Transformers have an input impedance that is frequency-dependent."


Since a SUT can only reflect the impedance it "sees" back to the cartridge, how is it that the impedance seen by a cartridge operating through a SUT can be any different from a constant frequency-dependent product of the impedance of the phono stage that it is driving (divided by the square of the turns ratio)? Yes, I recognize that real world transformers do introduce some nonlinearities because of inductance and capacitance of the primary and secondary coils, etc, but speaking of the ideal case here. And even if that Henley postulate were true, why is it necessarily a good thing? Especially how does that result in the production of "less harmonic distortion as the frequency rises"? Since Story and Tre' seem to accept the statement, perhaps I am missing something.

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