Balanced Operation - moon 380D Neo Series Owner's Manual

Owner's Manual

Balanced Operation

When using an unbalanced interconnect, the audio
signal runs through both the center wire and the
shield/ground wire. Any noise picked up by this
interconnect (ie. nearby magnetic fields such as an AC
power cord) will be reproduced by both the
preamplifier and amplifier, then heard through the
loudspeakers. Conversely, a balanced interconnect has
three separate conductors; one for the ground and two
for the actual signal. These two signals are identical
except that one is 180 degrees out of phase with the
other. For example, when one conductor is carrying a
signal of +4 Volts, the other will be carrying a signal of –
4 Volts. When these two inverted signals on a balanced
line are output from the Nēo 380D, any noise picked up
by the interconnect will be eliminated since a
differential circuit amplifies only the difference between
these two signals: Noise on a balanced interconnect
will be equal on both conductors and therefore cancel
out
.
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