Mackie 406M, Owner'S Manual

Page: 18 / 36

18
TIME/RATE PARAMETER
If you have a reverb effect selected, this
control adjusts how long the reverberation
lasts, with 0 being a short reverb time and 10
being the longest.
If you have a delay effect selected, this
adjusts the amount of time between the origi-
nal signal and the delayed signal, with
0
being
a short delay time and
10
being the longest
delay time.
If you have a chorus, flange, or phaser effect
selected, this control adjusts the rate or speed
of the modulation of the effect.
DAMPING/DEPTH PARAMETER
If you have a reverb or delay effect selected,
this control adjusts how fast the higher frequen-
cies roll off in the reverberation or delay, with
0
having no roll off and
10
having the most roll off.
If you have a chorus, flange, or phaser effect
selected, this control adjusts the depth of the
modulation of the effect.
MAIN EQUALIZER
The
MAIN EQUALIZER
is used to shape
the overall frequency response for the main
speakers. The equalizer is the last thing in the
chain prior to the signal being routed to the
power amplifiers and the
MIXER LINE OUT
.
How to Adjust the Graphic Equalizers:
Note: These instructions are written on the
top of the PPM Series cabinet, but we’ll repeat
them here because they are so important.
Reducing Feedback (Do monitor first)
1. Set the
MIC
channels to working volume
levels (see “Level Setting” on page 6).
2. Set the Graphic EQ sliders to zero (center).
3. Slowly turn up the
MAIN MASTER
volume until feedback just begins to
occur. BE CAREFUL! Feedback can occur
quickly and become very LOUD, very fast.
4. Cut the appropriate slider until feedback
stops.
Suggestions for Better Sound
1. For better vocal sound, set the
125, 250,
and
16K
sliders to +5.
Note: Make sure the singer is within 3 to
6 inches of the microphone. No amount
of EQ can save a vocal when the singer is
too far away from the microphone.
2. For more presence, set the
4K
and
8K
sliders to +5.
3. To warm up the overall sound, set the
2K
slider to –5.
4. Use the
RUMBLE REDUCTION
switch to
reduce the noise floor.
5. REMEMBER, LESS IS BETTER.
75Hz RUMBLE REDUCTION
There are two of these switches; one for the
monitor output and one for the main output.
Pushing in this switch places a low-cut filter
into the circuit path, rolling off the frequencies
below 75Hz.
Use the
RUMBLE REDUCTION
switch on
the main output to reduce stage rumble (low-
frequency noise from footsteps picked up by
microphones on stage) and microphone-
handling noise. Use the
RUMBLE REDUCTION
switch on the monitor output to reduce the
muddiness caused by the lows feeding back into
the main output through the stage microphones.
Note: This filter is separate from the graphic
equalizer. The main
RUMBLE REDUCTION
switch affects only channels 1-6 and not the
stereo channels 7 & 8,
EFX TO MAIN
, or
TAPE
IN
. The monitor
RUMBLE REDUCTION
switch
does affect the
EFX TO MON
signal.
PARAMETERS
10 0 10 0
REVERBS
DELAYS
CHORUS
FLANGE
DAMPING
DEPTH
PHASER
TIME
RATE
NORMAL NORMAL
MASTER OUTPUT SECTION Description
POWER LED
This indicator lights up whenever the
POWER
switch is turned on and the PPM Series
is plugged into a live outlet, just to let you
know you’re ready for action.
MONITOR EQUALIZER
The
MONITOR EQUALIZER
is used to
shape the overall frequency response for the
monitor speakers on stage. This is called a
graphic equalizer because the position of the
sliders provides a graphic display of the
frequency response at its output. The equalizer
is the last thing in the signal chain prior to
being routed to the
MONITOR LINE OUT
(and the power amplifier if the
POWER AMP
ROUTING
switch is pushed in).