Constellation Audio Virgo Preamplifier - Manual (Page 6)

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If your Virgo does not function correctly, refer to the Troubleshooting section at the end of this manual. If you
are still unable to resolve the problem, contact your Constellation Audio dealer.
If any liquid is spilled on the preamp, or if any metal object (such as a staple or a paper clip) is inadvertently
forced inside, immediately disconnect the AC power and contact your Constellation Audio dealer.
Source device and amplifier connections
1. XLR inputs
On the rear of the Virgo preamp there are eight XLR inputs, four on each side. As you are looking at the rear
panel, the left four XLR inputs are for the right channel, the right four inputs are for the left channel.
Underneath each jack is the corresponding input number. Use of XLR connections is recommended for the
best possible audio quality. To remove an XLR plug, push on the tab above the jack and pull the plug out.
IMPORTANT NOTE: To preserve true dual-mono operation, the Virgo uses a symmetrical circuit layout. This
configuration requires that the Virgo’s back panel connections be laid out a little differently from those on most
preamps. For example, the left-channel connection for Input 1 is at the far right side of the back panel, and the
right-channel connection is at the far left side. Connecting the cables in the usual side-by-side fashion will
result in an incorrect installation and the mixing of sounds from different source devices.
The input numbers from left to right, looking at the back of the Virgo are:
1
right
, 2
right
, 3
right
, 4
right
——4
left
, 3
left
, 2
left
, 1
left
.
2. RCA inputs
These unbalanced inputs are provided as a convenience for use with unbalanced signal sources. Whenever
possible, we recommend using XLR connections instead. Connecting to an unbalanced source is handled in
the same way an XLR balanced source.