Constellation Audio Virgo Preamplifier - Manual (Page 7)

7
The input numbers from left to right, looking at the back of the Virgo are:
5
right
, 6
right
, 7
right
, 8
right
——8
left
, 7
left
, 6
left
, 5
left
.
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 5 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.
3. XLR outputs
The inner six XLR connections on the rear of the Virgo are outputs. The signal at these outputs is the same—it
does not matter if you use output 1 or output 2. To remove an XLR plug, push on the tab on the connector body
and pull the plug out.
From left to right, looking at the back of the Virgo, the outputs are: 1
right
, 2
right
——2
left
, 1
left
.
Be sure to match the output to the correct channel on your amp. As you are looking at the back of the Virgo,
the outputs on the left side are for the right channel, the outputs on the right are for the left channel.
When XLR connections are used to connect the Virgo preamp with the Centaur or Hercules amplifiers, the
Constellation Link is created—an audio interface that is, in essence, perfectly balanced. The positive- and
negative-going halves of the signal will exhibit near-zero difference except for their polarity.
4. RCA outputs
RCA unbalanced outputs are also supplied for amplifiers and recording devices not equipped with XLR
connections. The signal at these outputs is the same—it does not matter if you use output 1 or output 2.