Audio Note M5 Line - Manual (Page 9)

CONNECTION continued…
3
XLR MALE
OUTPUT
1
2
3
RCA
OUTPUT
SOCKET
BALANCED /
SINGLE ENDED
SWITCH
Balanced The M5 Line 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 power amplifier.
Below is a description of the various cable and connection options: -
The pin configuration for all Audio Note (UK)
XLR / BALANCED connections is as follows: -
PIN 1 Ground / Shield
PIN 2 Positive / Send
PIN 3 Negative / Return
The balanced and unbalanced outputs cannot be used
simultaneously; select the appropriate output using the toggle switch.
When using an 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 preamplifier’s ground.
When set in the ‘SINGLE ENDED’ (unbalanced) position, the
secondary ‘floats’ in relation to the preamplifier ground. This provides
the option of either a low or high common mode impedance to ground
at the preamplifier output. Experiment with both positions to achieve
the lowest background hum from the system.