PROMIX66/88
3 VELLEMAN
3.
TRIM Control
The TRIM control adjusts the input sensitivity (channel gain) of the MIC and LINE inputs on
the mono input channels. This control can be adjusted to accommodate input signals from a
wide variety of sources, from the high outputs from keyboards or drum machines to the small
signal outputs of microphones. This wide range eliminates the need for MIC / LINE switching.
The best S/N balance and dynamic range will be achieved if you adjust the TRIM control on
each channel separately so that the PEAK LED (7) for that channel lights occasionally.
NOTE:
This control should always be turned fully anticlockwise whenever you connect or
disconnect a signal source to one of the inputs.
4.
EQUALIZER Controls
All mono input channels are fitted with three-band EQ. The upper (HIGH) and lower (LOW)
shelving controls have their frequencies fixed at 12kHz and 80Hz respectively. The midrange
control has a peaking response, with Q fixed at 2 octaves and the frequency at 2.5KHz. All
three bands have up to 15dB of cut and boost with a centre detent for "off".
5.
AUX / EFF SEND Control
The AUX / EFF controls are mono and post-EQ and post-fader. The signal level sent to the
AUX / EFF bus will be affected by the channel fader setting. The AUX configuration is ideal for
almost all monitoring purpose e.g. for a separate stage monitor mix in live performances or a
studio room monitor in recording applications, such as for a headphone cue system. The EFF
controls the adjustment of level sent by each channel to the internal DSP (Digital Sound
Processor).
6.
PAN Control
The channel PAN positions the output of the channel in the stereo field of the Master Mix. Its
constant-power design ensures there are no level discrepancies whether a signal is hard-
panned, centre-stage or somewhere in-between.
7.
PEAK Indicator
The PEAK LED illuminates when a channel is going into overload. It detects the peak level
after the EQ and will light at 3dB before clipping to warn that the signal is approaching
overload. You do not want the PEAK LED to light except very intermittently during a take or a
mix. If it does light persistently, reduce input gain with the TRIM control (3).
8.
CHANNEL GAIN Control
The channel GAIN controls determine the output signal level to the master mix bus. There is
no PFL function on the mixer. In order to audition any single channel for proper gain, you can
turn off the gain control of all the other channels (fully anticlockwise) and set both the
auditioned channel and MASTER MIX control (29) to unity gain (0dB). The LED OUTPUT
meter (21) should read around 0dB.
STEREO Input Channel (fig. 2)
4. EQUALIZER
Controls
The stereo channel EQs operate in the same manner as those in the mono channels. The left
and right signals will be affected equally. A stereo equalizer is generally preferable to using
two mono equalizers when equalizing a stereo signal as it avoids possible discrepancies
between the left and right settings.
5.
AUX / EFF SEND Control
These are the same as for the mono channels. Note that a mono sum is taken from the stereo
input.
8.
CHANNEL GAIN CONTROL
The channel GAIN controls determine the output signal level to the MASTER MIX bus. There
is no PFL function on the mixer. In order to audition any single channel for proper gain you
can turn off the gain control of all the other channels (fully anticlockwise) and set both the
auditioned channel and MASTER MIX control (29) to unity gain (0dB). The LED OUTPUT
meter (21) should read around 0dB.
