Two signals wires plus a separate ground wire.
Balanced line signal cable.
The chief advantage of the balanced line format is good rejection of external noise when fed to a differential amplifier.
One of the signal wires gets inverted which allows the cable to completely avoid picking up outside interference.
As in the unbalanced cable the ground wire still surrounds the signal wires and is used as a shield against interference.
The other wire is reversed in polarity.
Balanced cables vs unbalanced cables.
Two signals wires plus a separate ground wire.
The two wires form a circuit carrying the audio signal one wire is in phase with respect to the source signal.
Balanced cables and signals a balanced cable by contrast has three conductors in the connector and three wires in the cable.
A balanced cable by contrast has three conductors in the connector and three wires in the cable.
As in the unbalanced cable the ground wire still surrounds the signal wires and is used as a shield against interference.
Two of those wires carry the signal while one carries the ground.
A typical balanced cable contains two identical wires which are twisted together and then wrapped with a third conductor foil or braid that acts as a shield.
Balanced cables have three conductors and three wires.