ART Pro Audio Pro Channel - Mic Preamp/Compressor/EQ - Manual (Page 17)

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Master Controls
Master Output Control
The Master Output control
sets the final output level
leaving the Pro Channel.
When the control is fully
counterclockwise, there is
no output. Turning the
control clockwise increases
the output level to a
maximum gain of +10dB.
When setting this control,
refer to the VU Meter (set
for the “Output” option—see below) or the level meter on your recorder or mixer.
VU Meter
A backlit, average reading VU meter can accurately monitor levels at several points in
the Pro Channel. The “0VU” level is calibrated to +4dBu at any of the internal points
and at the ¼” Output connector. For the same calibration on the XLR output, a 600
Ω
load must be used otherwise the balanced output is 6dB higher (0VU = +10dBu).
Note: When running the Pro Channel into a mixing console or recorder, always
reference the meter on the mixer or recorder when setting output levels. Not all meters
are calibrated the same and it is always best to look at the level entering the last piece of
equipment in the chain.
VU Meter Switches
The VU Meter switches determine which point feeds the VU meter. The right-hand
switch selects either the Pro Channel’s output or an internal point selected by the other
switch. The left-hand switch selects either the preamp output or the compressor output.
Note: When the right-hand switch is set to Output, the left-hand switch has no effect.
Another Note: The internal level-monitoring points also correspond to the level at the
Send jacks of the two insert loops. If you are using either of these jacks as your output
to other devices, switch the VU Meter to monitor the appropriate point.
Power
The Power switch supplies and removes power from the Pro Channel. The Pro Channel
should be turned on only after all monitor levels are turned down or off, to protect
against any “thumping” caused by high gain settings. Likewise, the Pro Channel should
be turned off after turning all monitor levels down.
The Output Level VU meter is illuminated when power is on.