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There are two basic ways to transport an audio signal with microphone or line level:
Unbalanced line: Utilising a two conductor cable, it transports the signal as the voltage between them.
Electromagnetic interference can get added to the signal as undesired noise. Connectors that carry
signals if one of the pins is unused.
Balanced line: Utilising a three conductor cable, one of them acts as a shield against electromagnetic
noise and is the ground conductor. The other two have the same voltage with respect to the ground
noise is cancelled out while the programme signal doubles in level. Most professional audio devices use
(Cannon) and ¼” (6.35mm) stereo.
inputs. The connectors on the left-hand side come from a signal source, and the ones
on the left-hand side, two terminals are joined inside the connector. If hum occurs with balanced to balanced
connections, try disconnecting the sleeve (ground) on the input connector. Note that the illustrations show
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