A type of audio plug used with patch bays from Switchcraft, Neutrik, ADC, Bittree, and others.
View attachment 3246
http://www.fullcompass.com/product/293162.html
Similar to, but not compatible with, a 1/4" TRS plug.
View attachment 3246
http://www.fullcompass.com/product/293162.html
Similar to, but not compatible with, a 1/4" TRS plug.