[QUOTE=pctower]Gee, I wonder why none of you objective scientists have never metioned this paper:

http://w3.mit.edu/cheever/www/cheever_thesis.pdf[/QUOTE]

What kind of a club is that, Phil?

Are you implying that someone here thinks everything sounds the same? If so, shame on you.

I can't download the thesis on the computer in the library here in Florida, but as I recall he used single blind tests. In the past, you have asked what sort of blind tests might be acceptable in a college course, and there is one answer--these weren't even double blind. And yet you maintain that DBTs done by competent people are not scientifically valid, though I don't think you gave any reasons for that judgment.

I should also point out that his work does not break any new ground as to just noticeable differences, but simply maintains that the SS amplifier used (a Hafler?) could under some circumstances produce high order distortion products which could be audible under some circumstances. However, when I read it some time ago, I was not at all sure Cheever had eliminated other differences sufficiently to be sure he had identified what caused the audible difference.