Thomas A wrote:
Is there any published DBT of amps, CD players or cables where the
number of trials are greater than 500?

If there difference is miniscule there is likely that many "guesses"
are wrong and would require many trials to reveal any subtle
difference?

There are published tests where people claimed they could hear the
difference sighted , but when they were 'blinded' they could not.
In this case the argument that 500 trials are needed would seem
to be weak.

However, a real and miniscule difference would certainly be
discerned more reliably if there was specific training to hear it
beforehand.

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-S.