Balanced Operation - moon 780D evolution series Owner's Manual

Reference streaming dsd dac

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Figure 5: Remote Operation with SimLink™ and 12V Trigger

In figure 5 we have a 780D DAC connected to a 740P Preamplifier via their respective SimLink™ ports (using a 1/8"

mini-jack cable), and the 740P is connected to a 870A Amplifier via their respective 12V triggers (also using a 1/8"

mini-jack cable). When you turn on the 780D via remote control (or its Standby button), both the 740P and 870A

will turn on automatically. The same rule applies when you put the 780D into Standby mode

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.

780D Evolution

Series

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 +2 Volts, the

other will be carrying a signal of –2 Volts. When these

two inverted signals on a balanced line are output from

the MOON 780D, 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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