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
@oldhvymec

Yes
Different people listen to and appreciate different aspects of the music they listen to. Some are sensitive to bass.. drum beats, tonal balance, midrange, imaging. My partner and I comment while watching a movie... we all notice the explosions... but we constantly notice completely different details... i’l notice the brand of fountain pen or a watch while my partner will notice the wallpaper color. Music is like that also.
Same for video. 

Depth of image and subtlety of image, 3d life like effects..all mean nothing to some people, they don't like DLP projected images. whereas that (what good DLP does) is the core of what some demand.

Whereas they love LCD projectors with the candy colors the shades of color are more important to them, they don't care or even notice if the image is fuzzy, flat, no contrast, with greyed out black levels. lifeless mud. but the color is important. somehow.

JVC DILA projection is probably the best compromise that moves in a good direction in all areas.
Low sensitive box speakers can sound dynamic with super powerful amplification.
It is not true because thermal distortions.