Solo Bus; Solo Switches; Stereo/Mono Solo Switch - Benchmark PRE420 Instruction Manual

4-channel microphone preamplifier/mixer
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Solo Bus

The PRE420 has a flexible solo bus that
allows:
Mono monitoring of any mix of
microphones
Stereo (post pan) monitoring of any
combination of microphones
Stereo monitoring of the main mix bus
Mono monitoring of the main mix bus
The output of the solo bus is directed to the
"monitor" fader and then to the headphone
and "control room" outputs.

Solo Switches

The solo bus has one solo button for each of
the 4 channels. These can be pressed in any
combination to create a mix of microphones.
If any microphone solo button is pressed, the
"Solo" indicator will illuminate.
PRE420 Instruction Manual – rev. E

Stereo/Mono Solo Switch

Microphones may be monitored before the
pan control (mono) or after the pan control
(stereo). Press the "Mono/Stereo" switch for
stereo solo. Stereo monitoring can be used
to check the pan position of a single
microphone or any combination of
microphones.
If none of the 4 microphone solo buttons are
pressed, the main stereo mix is directed to
the solo bus.
NOTE: The "Mono/Stereo" switch is only
functional when one or more microphone solo
buttons are pressed. This makes it easy to
toggle between the main stereo mix and a
mono solo of a single microphone.
TIP: TO CHECK A MIX FOR MONO-
COMPATIBILITY, PRESS ALL 4
MICROPHONE SOLO BUTTONS. THEN,
USE THE "MONO/STEREO" BUTTON TO
TOGGLE BETWEEN THE MONO MIX AND
THE MAIN STEREO MIX.
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