1) A common 3 pin connector used in balanced audio connections.
2) A microphone Cable.
A method of placing two cardioid microphones for stereo pickup, with the two microphone heads as close as possible without touching, pointing 90 degrees to each other and also pointing 45 degrees to the center of the sound source.
Multipin metallic audio connector. (3 pin for normal sound use, 5 pin for DMX, Colour Scrollers etc.). Sometimes called Cannons after the original manufacturer. See balanced line. The UK standard for wiring the 3 pin connector is as follows: Pin 1 (Screen), Pin 2 (+ve / “hot”), Pin 3 (-ve, “cold”). (Xternal, Live, Return).