a. The mini plug and the phone plug are the two familiar audio plugs.
mini plug is a smaller version of the phone plug (fig 3-7).
Mini plug and phone plug
b. You will also find plug receptacles on some monitors and 1-inch VTRs.
These plugs are heavy-duty plugs originally designed to connect microphones to
control consoles in recording studios. The plugs and associated receptacles can be
either male or female, depending on the manufacturer.
These plugs are three-
conductor plugs with three pins sticking out of the male jack or receptacle (fig 3-
There are three holes in the female jack or receptacle.
Pin No. 1 of the
three-conductor terminals is designed to be used as an overall shield connection.
Pin No. 2 is used for the signal conductor, and pin number three for the ground