When using unbalanced signals, the signal ground may be obtained by linking pins 1
and 3 in the mating XLR connector. Good quality screened cable should be used,
particularly for microphone or low level sources, to prevent hum or noise pickup.
Unbalanced Line Inputs.
An unbalanced line level input is provided for each channel, on a 0.25” mono jack
socket. The mating plugs should be wired as follows:
- Tip = Signal Phase (“+” or “hot”).
- Screen = Ground.
Auxiliary Inputs.
A 2 pin (mono) jack plug is required, which should be wired as follows:
- Tip = Signal Phase (“+” or “hot”).
- Screen = Ground.
Insertion Points.
The insertion points are interfaced via a 3 pin, 0.25” switched jack socket on the rear
of the unit. The pin connections are:
- Sleeve = Ground,
- Tip = Send,
- Ring = Return.
The insertion point is unbalanced, and operates at a nominal level of -2dBu . If used
as an additional send only (e.g. as a send to a tape machine or monitor mixing desk),
the Tip and Ring should be wired together, to preserve the signal path through the
insertion point.
Outputs.
The outputs are via balanced, 3 pin male XLR connectors. The mating connectors
should be wired as follows:
- Pin 1 = Ground (screen),
