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MCN AUDIO - U1127 - MICROPHONE PREAMPLIFIER
FRONT PANEL
IN A
Channel A input
1 Ground
3 pin XLR connector
2 Hot +
Pin 1 is connected to the metallic frame
3 Cold -
IN B
Channel B input
1 Ground
3 pin XLR connector
2 Hot +
Pin 1 is connected to the metallic frame
3 Cold -
GAIN
Gain selection applied to the input signal.
ON
Rotary selector : ON/ OFF/ OSCillator
FILTER
On the OFF position the unit is turned off.
On the ON position is turned on.
Microphone power is active.
No filter is active.
On the 20 Hz position, the 20 Hz filter is active.
On the 80 Hz position, the 80 Hz filter is active.
On the 130 Hz position, the 130 Hz filter is active.
On the OSC position, the signal of the oscillator is present at the output of the
preamplifier at the reference level.
The input signal is disconnected from the outputs. The Microphone power is still active.
The blue ON pilot light is lit when the unit is ON. It flashes when power is low.
The green EXT pilot light lights when the preamplifier is powered by an external power
source through the connector on the rear panel.
A
Channel A overload pilot light
This led lights when the signal is 6dB below clipping, that is 14 dB at the output, or when
the signal of the internal filter is 6 dB below clipping.
B
Channel B overload pilot light
This led lights when the signal is 6 dB below clipping, that is 14 dB at the output, or when
the signal of the internal filter is 6 dB below clipping.
