Blind fold hearing test

There are several perfectly valid reasons why some people don’t hear differences between amps or between anything. A Blind test result that has negative results actually does not mean much. Now, if there is a pattern of many independent negative results that would perhaps be more convincing. It depends on the data, how many negative results and how many positive results. 

@jssmith, "I've been in blind amp tests and I can emphatically say "No", I can't tell the difference in amps. I seriously doubt if anyone could tell speaker brands unless they've been repeatedly exposed to those speakers, have material they're familiar with, know which brands are in the test and there's a "tell" about them. For instance, put my Paradigms and Maggies side-by-side and yeah, it's easy. Especially on metal or acoustic."

Thanks for that. It concurs with the opinion of many users and virtually all of the data.

When it comes to amps, the main factor, above any infinitesimal sound quality differences, is their ability to drive the matched speakers. 

With easy to drive loudspeakers there is no obvious difference. Even sighted tests wouldn't change that fact, only the illusion.

jssmith"I've been in blind amp tests and I can emphatically say "No", I can't tell the difference in amps."

If you can not tell the difference between high end amplifiers for use in Music Reproduction Systems then you must have one very bad sounding system because the differences are substantial, significant, and profound.

No

Shirley Temple; I don’t go all the way.

J. Edgar Hoover: I don’t go all the way, either.