Jack: 1) A type of connector used
in sound equipment; sometimes called a phone jack. There are two types,
mono and stereo, found in two sizes (standard: 6.3mm and mini: 3.5mm).
At one time most sound equipment used standard jacks, but now they are
usually only used on line-level gear: microphones normally have XLR connectors.
2) A triangular-shaped brace used to support scenery.
Any problems or