Each channel has a female, 3 pin XLR connector, suitable for balanced or unbalanced
line sources at a nominal level of +4dBu. The mating connector should be
appropriately wired as follows for balanced or unbalanced operation:
Balanced inputs:
- Pin 1 = Ground (screen).
- Pin 2 = Signal Phase (also known as “+” or “hot”).
- Pin 3 = Signal Non-Phase (“-” or “cold”).
Unbalanced inputs:
- Pin 1 = Ground (screen)
- Pin 2 = Signal Phase (“+” or “hot”).
- Pin 3 = Signal Ground
When using unbalanced signals, the signal ground may be obtained by linking pins 1
and 3 in the mating XLR connector. If this connection is not made, a loss in level may
result.
Unbalanced Line Inputs.
An unbalanced line level input at a nominal level of -10dBu is also 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.
The auxiliary input is suitable for direct connection of instruments including guitars
and keyboards. Good quality screened cable should be used, particularly for
microphone or low level sources, to prevent hum or noise pickup.
