These connectors are prepared to work with Unbalanced Signal.
Some unbalanced connectors are: BNC, RCA, and JACK TS.
Pin designation:
BNC: Positive Signal: central contact, Return + Ground (Shield): chassis connector.
RCA: Positive Signal: central contact, Return + Ground (Shield): chassis connector.
JACK TS: Positive Signal: Tip, Return + Ground (Shield): Sleeve.
JACK TRS (Stereophonic applications in headphones): Left Signal: Tip, Right Signal: Ring, Return + Ground (Shield): Sleeve.
XLR-3: These connectors have 3 pins and are used for balanced connection, but if a piece of equipment uses an unbalanced signal and accepts an XLR connection, pins 1 and 3 must be linked.
