Mackie 408S Owner's Manual download pdf (Page 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

being

a short delay time and

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

having no roll off and

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

and

sliders to +5.

3. To warm up the overall sound, set the

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

. The monitor

RUMBLE REDUCTION

switch

does affect the

EFX TO MON

signal.

PARAMETERS

100

REVERBS

DELAYS

CHORUS

FLANGE

DAMPING

DEPTH

PHASER

TIME

RATE

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).

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Mackie 408S Owner's Manual Page 18

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