scope:

This standard applies to circular and concentric connectors to be used for the interconnection of sound system components and gives the applications and also the contact arrangement and contact designation for these connectors. In sound systems it is often necessary to connect pieces of equipment from different manufacturers and even from various countries in order to achieve desired objectives. These include the making of recordings or copying of recorders already on tape or cassette, achieving a higher sound level by means of a seperate power amplifier, feeding loudspeakers, automatic control of slide projectors, etc.