Instead of suggesting the convergent effect for cases of consensus, Id like to suggest sheer politeness. Its better than turning to the person listening next to you and asking Are you DEAF?!?
"Apart from the overall lack of evidence and the sheer physical implausibility of some of the products, there is some classic research in social psychology that have implications for this topic."
Overall lack of evidence of what? Is there proof Led Zeppelin is better than Beethoven? Its about perception (and preferences). Im sure perceptions can be colored, but more important is simply the ability to perceive and the value placed on differences. Years ago, my brother thought I was crazy for spending money on expensive cables. He is an electrical engineer and thought there should be no audible difference in speaker wire. I sat him down one day and played the system through lamp cord then through the cable I had at the time (MIT MH-750 yes, it was awhile ago). He said yea, it sounds a little better, shrugged his shoulders and left the room. To me it was like night and day but he was just not as passionate about sound as I was. The difference meant nothing to him even though it existed. The same difference in sound can be experienced as completely different magnitudes by different listeners. Its similar to how one person finds a painting beautiful while another sees it and walks by without giving it a second thought. Oh, and well engineered products usually test better, sound better, and cost better. :)
"While our senses are rather limited, our ability to fool ourselves is almost endless."
Speak for yourself.
"In fact, cognitive dissonance theory predicts that the more you pay for the cables, the more inclined you will be to conclude that they sound good, regardless of the actual quality of the cables."
I would argue there are more people who set up brand new expensive pieces of equipment and are disappointed at first hearing it, than those who love it, until of course it breaks in. How then would this be explained? (OK Im sure someone will say its initial buyers remorse that the kids will never get braces
..until you get over that.)
I dont think (in most cases) owning expensive equipment is simply a matter of people being able to afford it so they buy it. I used to work in an audio store and most of the audiophiles were from modest means. They bought expensive products for the sound it created, not because they were wealthy and could afford it.
"Is it really possible to tell the difference between normal high-end equipment, and equipment that veers into the audiophile range?"
Yes. I have many friends who are not into the hobby but have heard expensive systems and get it. They have been able to hear the differences in equipment incredibly well even though their ears are not educated. In fact one of them is a building contractor whose hearing is becoming impaired and he is an incredibly astute listener.
"In other words, its not really worth trusting an audio reviewer who is older than you are, because there is a range of higher frequencies that you can hear while they cannot."
How do you know a 25 year old reviewer hasnt blown his/her eardrums out with ear buds/pyle driver subs/the new straight pipes he put on his Harley?
As a person ages, their hearing normally changes very gradually. Perception of live music, and reproduced music will change as well but equally. This does not mean that a reviewer cannot distinguish differences in equipment its just their frame of reference has changed. Even with reduced sensitivity to higher frequencies acuity can be spot on. I would be more inclined to take the advice of someone with 40 years experience than rookie with fresh ears. Therefore I would suggest extending a reviewers useful life to 62 years so they can at least collect Social Security.
Yes, those are common sentiments outside our hobby and even inside. It seems like the objectivists have such a hard time with the subjectivists. Art is subjective and fun. Is that a problem?