Drawmer CMC3, Руководство пользователя

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CMC3
- Monitor Controller
2
MASTER VOLUME
The Monitor Volume control (2) adjusts the signal level of both stereo channels for
all speaker outputs. The Volume knob affects the volume of the monitors A,B,C and
SUB only and does not have a bearing on any other output such as the headphones
or talkback jack.
A secondary preset volume control on the front edge (2a) provides a repeatable
calibrated output level for the monitors, so that at the press of the switch just below
the main volume knob the engineer can hear the mix at the same predetermined
volume, time after time, without having to meticulously adjust controls. Once the
system is calibrated the predetermined level could be set via a screwdriver to the
maximum listening level, 85dB in the case of TV, film and music, for example, or to
a standard listening level for radio, or even a preferred level for quiet passage. The
level chosen is at the discretion of the operator.
Both the volume knob and preset control circuit designs incorporate identical
parallelled custom quad potentiometers, for excellent channel matching and a
smooth feel, with a range from Off (-infinity) to +6dB of gain.
Because the circuitry is active it allows for the signal level to be increased, rather
than only attenuated, making subtle problems within the mix (such as noise at low
levels, or unwanted harmonics, for example) more obvious and easier to iron out,
especially during musical passages that would normally be quiet.
Before you can make full effective use of the Volume control it is necessary to
calibrate the entire monitoring system, this allows for accurate level control, as
well as left/right balance throughout the knob’s range. Note that the actual output
levels, including the maximum output level and the position of unity gain (0dB)
around the knob, will alter depending on the calibration of the monitors.
WARNING:
It is recommended that you turn the volume control down to a lower level before
turning the CMC3 off - this is to ensure that a sudden volume increase when
turning on does not damage your speakers or your hearing.
In addition, do not use excessive force at either end of the volume knob - it’s
size would mean that damaging the potentiometer is possible.
Note that on the underside of the CMC3 there are 2 rotary controls that allow the left
and right speaker level of all of the Speaker Outputs
(10) to be trimmed. If the input
levels into the CMC3 are very high the operator will find that the optimum location of
the volume knob (i.e. 85dB output level) would be at around 9 o’clock or worse -
leaving them with only a few degrees of rotation in which to lower the volume. By
adjusting the trims underneath this can be improved to give the preferred listening
level to somewhere more useful, such as the 12 o’clock position. This is especially
useful for those studios who work at high gain levels, allowing them to come into
the CMC3 ‘hot’.
To alter the speaker level trims use a small screwdriver to turn - counter-clockwise
turns the speaker level down, and clockwise up.
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