Master Controls

PPM608

 

 

31

As with the channel EQ, just take it easy.

 

 

There is a large amount of adjustment, and

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if you are not careful, you can upset the

 

36

delicate balance of nature. Although it may

 

 

 

not seem cool to actually turn down controls,

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34

 

 

with EQ it is often your best option. Turn

35

 

down the offending frequency range, rather

 

 

 

than boost the wanted range. You can reduce

 

 

 

 

the level of some frequency bands where

 

 

 

 

feedback occurs.

 

38

 

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With this constant–Q graphic

 

 

 

EQ, the bandwidth (and Q) of a

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frequency band doesn't vary with

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the amount of boost or cut, and it

 

 

 

 

 

 

has minimal effect on adjacent bands for all

 

 

 

 

settings of the slider levels. (There's always

 

 

 

 

some effect on adjacent bands to avoid too

 

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much variation or ripple between bands,

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but the constant-Q design keeps this fairly

 

 

 

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constant for all settings.) The position of the

 

 

sliders gives a good indication of the fre-

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quency response across the audio band. Non-

 

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constant types of EQ (on other mixers) give

 

 

 

a wider bandwidth for lower levels of boost

 

 

 

 

or cut, and narrows as the level goes up or

31. POWER LED

 

 

down. For example, if you're boosting 500 Hz

 

and 2 kHz slightly, the 1 kHz band will also be boosted,

 

 

 

 

This LED comes on when the powered mixer is

even though the 1 kHz slider is in the flat position.

plugged into the correct-voltage AC mains supply, and

 

 

the rear panel power switch [2] is on.

 

33. FX TO MAIN

 

If the LED does not turn on, make sure the AC

This knob lets you adjust the level of the internal ef-

power is live, both ends of the power cord are correctly

fects being added to the main mix. It is a stereo control,

inserted, your electricity bill has been paid, the lights in

as the output from the internal effects processor is

town are on.

 

stereo and is added to the left and right main mix.

32. MAIN MASTER GRAPHIC EQ

 

Adjust the FX level being added, compared to the

 

other channels playing in the main mix.

 

 

 

 

This 7-band graphic equalizer adjusts the main mix

At the fully-down position, no effects are added, the

output. It affects the line-level outputs [19], as well as

center U mark is unity gain, and 10 dB of effects gain is

the main speaker-level outputs if the internal amplifiers

available at the fully clockwise position.

are playing the main mix.

 

 

 

 

 

Each slider allows you to adjust the level of its

34. MAIN LEVEL

frequency band, with up to 15 dB of boost or cut, and

This knob controls the level of the main mix, and

no change in level at the center (0 dB) position. The

affects the meters [36], main line-level outputs [19],

frequency bands are: 125, 250, 500, 1k, 2k, 4k, and 8kHz.

main sub out [18], and the main speaker-level outputs

 

 

 

 

The EQ section comes after the main level [34], and

if the internal power amplifiers are playing the main

just before the main meters [36]. Therefore, as you ad-

mix. The level adjustment occurs before the EQ [32].

just the EQ, you can keep an eye on the meters in case

This gives you ultimate control over your audience.

you over-do it and take the levels into overload.

Adjust it carefully, with your good eye on the meters to

 

 

 

 

 

 

check against overloading, and your good ear on the

 

 

 

levels to make sure your audience is happy.

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PPM608