Audio Note DAC4.1x Balanced Signature Owner's Information page 10

Balanced The DAC4.1x Balanced Signature is equipped with custom designed
and manufactured output transformers, which utilize an improved
output and grounding scheme to provide the best possible connection
to the pre amplifier.
Below is a description of the various cable and connection options: -
RCA
OUTPUT
SOCKET
BALANCED /
SINGLE ENDED
SWITCH
The pin configuration for all Audio Note (UK)
XLR / BALANCED connections is as follows: -
PIN 1
PIN 2
PIN 3
The balanced and single ended outputs cannot be used
simultaneously; select the appropriate output using the toggle switch.
When using a pre amplifier with a true balanced input, the
'BALANCED / SINGLE ENDED' switch may be set in either position.
When set to the 'BALANCED' position, the centre tap of the output
transformer secondary is connected to the DAC4.1x Balanced
Signature's ground. When set in the 'SINGLE ENDED' (unbalanced)
position, the secondary 'floats' in relation to the DAC4.1x Balanced
Signature's ground. This provides the option of either a low or high
common mode impedance to ground at the DAC4.1x Balanced
Signature's output. Experiment with both positions to achieve the
lowest background hum from the system.
CONNECTION continued...
Ground / Shield
Positive / Send
Negative / Return
XLR MALE
OUTPUT
2
1
3