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interconnecting cable. This is necessary to ensure proper compliance with European Standards for
Electromagnetic Compatibility. Pin 1 carries no signal voltages or currents and is provided purely for
screening purposes. It should not be connected to either pin 2 or pin 3.
Source Unbalanced Pin 2 Hot
If the equipment providing the audio signal has an unbalanced output, then the interconnecting
audio cable should be wired so that the hot output of the source is connected to pin 2 of speaker
input XLR and the ground of the source connected to pin 3. The screen of the interconnecting
audio cable should be connected to pin 1 of the input connector
only.
There must be no
connection between the ground connection of the unbalanced output and the pin 1
ground connection of the input connector.
Source Unbalanced Phono
If the source output is a phono socket, then the centre pin of the phono plug should be wired to pin
2 of the speaker input XLR and the outer phono casing to pin 3. The wire from pin 1 of the XLR
will not be connected to the terminals of the phono plug. Strict adherence to this will help to
eliminate ground loop hums and RF break through.