MOON Eclipse CD Player
Rear Panel Connections
Figure 4: Rear panel of Moon Eclipse CD Player
The rear panel will look similar to Figure 4 (above). On the left side there are two (2) stereo pairs of
analog audio outputs: One pair is single-ended (unbalanced) inputs on RCA connectors and the other
pair are balanced XLR connectors. We strongly recommend that you use the balanced XLR connectors
on your Eclipse to maximize its level of performance:
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 the amplifier and 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 input into a
differential preamplifier such as the MOON P-5, 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 not be processed.
On the right side of the rear panel are two BNC connectors: One labeled “S/PDIF in” is intended for
use with an external digital source whereby the Eclipse will function as a digital-to-analog converter.
The other labeled “S/PDIF out” is intended for use when Eclipse will function as a digital transport and
digital signal processing will be handled externally by a surround processor like the MOON Attraction.
Finally, on the far right side is the DB15 connector for the DC input from the external power supply.
These rear panel connectors have been chosen because they provide the best possible connections for
your unit. A poor contact will degrade the signal substantially, and plugs and sockets should all look
clean and free of dirt and corrosion. The easiest way to clean them is to remove the cables from their
sockets and push them back in again. This procedure requires that your CD player and the rest of your
components be completely turned off. Not heeding this warning may result in serious damage to your
equipment. Special contact cleaning fluids and enhancers should not be used, as they deposit a difficult
to remove residue which degrades the performance of your components.
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Rear Panel Connections 13
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