Biggest audio hoaxes


Often when people discuss audio, they talk about "snake oil" or "hoaxes."

It's pretty typical to use the term hoax as a tactic against another who disagrees with one, or holds an unusual opinion or vouches for something which has not been verified. That's not what I mean by a "hoax." 

By "hoax" I mean an audio product or claim which has been pretty definitively disproved. Maybe not to everyone's satisfaction, but to common consensus.

So -- with that definition of hoax in mind, what are some of the biggest audiophile hoaxes you've heard of?
128x128hilde45
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I am with stargazer3.  With the exception of speakers, and even then it is exaggerated, it is a wonderful hoax played on willing audiophiles, the whole concept of 100's of hours of burn in, especially on cables. All the suppliers are in on it and there is 0 benefit to them to admit it is a hoax. They will even charge you a premium to do it for you.  
sugabooger
... it is a wonderful hoax played on willing audiophiles, the whole concept of 100’s of hours of burn in, especially on cables. All the suppliers are in on it and there is 0 benefit to them to admit it is a hoax ...
Wow - a "wonderful hoax"!
Why don’t you file a perfect class action lawsuit and put this "wonderful hoax" to rest for once and for all?
Beware the audio guru.
Uh oh, did I touch on a sacred hoax?   Why are you not suggesting class action lawsuits for the other hoaxes mentioned. Are you in on it? Oh my my my.