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

Balanced The DAC4.1x Balanced 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
ʻBALANCED / SINGLE ENDEDʼ switch may be set in either position.
When set to the ʻBALANCEDʼ position, the centre tap of the output
transformer secondary is connected to the DAC4.1x Balancedʼs
ground. When set in the ʻSINGLE ENDEDʼ (unbalanced) position, the
secondary ʻfloatsʼ in relation to the DAC4.1x Balancedʼs ground. This
provides the option of either a low or high common mode impedance
to ground at the DAC4.1x Balancedʼs 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