Balanced audio connections
The diagram below shows how to connect the 840A V2 to the Azur
840C Upsampling CD player using the Balanced Audio inputs via three-
pin XLR connectors. The 840A V2 can also be connected to non-
Cambridge Audio sources with balanced outputs).
Note: The Input 1 switch must be in the ‘Balanced’ position.
Balanced connections in an audio system are designed to reject
electrical noise, from power wiring etc, and also the effects of noise
currents flowing through ground connections. The basic principle of
balanced interconnection is to get the signal you want by subtraction,
using a three-wire connection. One signal wire (the hot or in-phase)
carries the normal signal, while other (the cold or phase-inverted)
carries an inverted version. The balanced input senses the difference
between the two lines to give the wanted signal. Any noise voltages that
appear identically on both lines (these are called common-mode
signals) are cancelled by the subtraction. An additional advantage is
that the connection effectively carries twice the signal level and so
improves the signal-to-noise ratio.
The 840A V2 and 840C are designed to work at their highest
performance when a balanced interconnect is used.
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840A V2azur
ENGLISH
840C
840A V2
