"Robert Morein" wrote in message
...
"Stewart Pinkerton" wrote in message
No, my argument is invulnerable, since any amplifier which
*does*
sound different from its input signal can readily be shown to
have at
least one glaring technical defect.
--

Then a lot of them do.

Yes, they do. The high-end is rife with bad designs.

Fortunately many mainstream components are competently designed.