19
rather than boost the wanted range. You
can reduce the level of some frequency
bands where feedback occurs.
26. MAIN MIX METERS
Developed from a harmless ex-NATO
hamster hypnotizer, these stereo meters
show the level of the left and right main mix,
after it has passed through the main master
level (28) and graphic EQ (25).
The top LEDs are marked CLIP, and
you should adjust the levels to stop these
coming on.
When power amplifi ers are pushed
beyond their maximum rated output, the
peak audio signals fl atten out (clip), as they
can go no higher than the amp’s power
supplies. Clipping can easily damage your
speakers, even those that are rated beyond
what your power amp can deliver.
27. FX TO MAIN
This knob lets you adjust the overall level
of the internal effects being added to the
main mix. It is a stereo control, as the output
from the internal effects processor is stereo
and is added to the left and right main mix.
Adjust the FX level being added,
compared to the other channels playing in
the main mix.
At the fully-down position, no effects are
added, the center U mark is unity gain, and
10 dB of effects gain is available at the fully
clockwise position.
28. MAIN MASTER LEVEL
This knob controls the level of the main
mix, and affects the meters (26), main line-
level outputs (11), and the main speaker-
level outputs (3). The level adjustment
occurs before the main graphic EQ (25).
This gives you ultimate control over your
audience. Adjust it carefully, with your
good eye on the meters to check against
clipping, and your good ear on the levels to
make sure your audience is happy.
The control does not affect the tape
output (10), monitor output (9), or internal
power amp B if it is playing a monitor.
The main mix signals are off with the level
fully down, the “U” marking is unity gain,
and fully up provides 12 dB of additional
gain. This additional gain will typically never
be needed, but once again, it’s nice to
know it’s there. The level control is stereo, as
it affects both the left and right of the main
mix equally. This is the control to turn down
at the end of the song when you want a
gentle fade out into applause (or stunned
and awkward silence).
29. MONITOR GRAPHIC EQ
This 7-band graphic equalizer adjusts the
monitor mix output. It affects the line-level
monitor output (9), and speaker-level output
channel B (3) if it is playing a monitor.
Each slider allows you to adjust the level
of its frequency band, with up to 12 dB of
boost or cut, and no change in level at the
center (0 dB) position. The frequency bands
are: 125, 250, 500, 1 k, 2 k, 4 k, and 8 kHz.
The EQ section comes after the monitor
level (32), and just before the monitor meter
(30). Therefore, as you adjust the EQ, keep
an eye on the meter in case you over-do it
and take the levels into clipping. As with the
channel EQ, just take it easy.
The sliders will help you reduce the levels
in the stage monitors of the frequency
ranges that could cause feedback from
nearby microphones.
30. MONITOR METER
This meter shows you the level of the
monitor mix, after it has passed through the
monitor level (32) and graphic EQ (29).
The top LED is marked CLIP, and you
should adjust the levels to avoid this coming
on.
31. FX TO MONITOR
This knob lets you control how much of
the internal effects is added to the monitor
output. The output from the internal effects
processor is stereo, summed to mono and
added to the monitor mix.
Adjust the FX level being added,
compared to the other channels playing in
the monitor mix.
At the fully-down position, no effects are
added, the center U mark is unity gain, and
there is 10 dB of effects gain at the fully
clockwise position.
