People couldn't tell the difference between music played through $100 cables or hangers

Overpriced cables are nothing new. However, a lot of people are misinformed about the actual benefits of paying $100 for a cable. 

An experiment was setup with 5 people blindfoldedly listening to music that was either run through a Monster cable or a Belden cable. In the middle of the experiment, the people running the tests switched the belden cable for a coat hanger wire!

No one of the blindfolded people realized the switch was made. The one caveat that they had was that this was only over 2 meters. Anything longer might benefit from better insulation.

(Source)