From a past Stereophile Magazine Reviewer:
interviewer:: Would you bet $10,000 that you could tell the difference between two CD players, preamps, amplifiers, or speakers in a double blind test?
reviewer: That's easy. I would not, [though I'd have the best shot on loudspeakers, particularly if I could pick the candidates, say a Klipschorn vs. a BBC LS3/5A!]
I believe there was another who offered $10,000 if one could tell the difference blind testing.
One could even use one's own personal ways of testing. I heard he had amassed some $150,000.
Of course, if one discusses the matter with medical specialists, the "typical" audio blind/dbt one sees
pushed is heavily skewed towards no sonic difference.
steve s