PPM1008

Master Controls

 

 

 

 

 

35

As with the channel EQ, just take it easy.

 

 

2 X 800W PROFESSIONAL POWERED MIXER

 

There is a large amount of adjustment, and if

 

 

37

 

 

 

you are not careful, you can upset the delicate

 

 

 

 

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balance of nature. Although it may not seem

 

 

 

 

 

cool to turn down controls, with EQ it is often

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38

 

 

 

your best option. Turn down the offending

 

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frequency range, rather than boost the wanted

 

 

 

 

 

range. Having many sliders will allow you to

 

 

 

 

 

 

reduce the level of some frequency bands where

 

 

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feedback occurs.

 

 

 

 

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With this constant-Q graphic EQ, the

 

 

 

 

 

bandwidth (and Q) of a frequency

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band doesn't vary with the amount of

 

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boost or cut. The adjustment of one

 

 

 

 

 

 

 

 

 

 

slider has minimal effect on adjacent bands

 

 

 

 

 

 

for all settings of the slider levels. (There's

 

 

 

 

 

 

always some effect on adjacent bands to avoid

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too much variation or ripple between bands,

 

 

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 frequency

 

 

 

 

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response across the audio band. Non-constant

 

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types of EQ (on other mixers) give a wider

 

 

 

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bandwidth for lower levels of boost or cut, and

35. POWER LED

 

 

 

narrows as the level goes up or down. For ex-

 

 

 

ample, if you're boosting 500 Hz and 2 kHz slightly, the

 

 

 

 

 

 

This LED comes on when the powered mixer is

 

1 kHz band will also be boosted, even though the 1 kHz

plugged into the correct-voltage AC mains supply, and

 

slider is in the flat position.

the rear panel power switch [2] is on.

 

 

 

 

 

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

37. FX TO MAIN

 

This knob lets you adjust the level of the internal

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

 

serted, your electricity bill has been paid, and the lights

effects being added to the main mix. (It is a stereo con-

in town are still on.

 

 

 

trol, as the output from the internal effects processor is

 

 

 

 

 

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

36. MAIN MASTER GRAPHIC EQ

This 9-band graphic equalizer adjusts the main mix output. It affects the line-level outputs [19], as well as the main speaker-level outputs if the internal amplifiers are playing the main mix.

Each slider allows you to adjust the level of its frequency band, with up to 15 dB of boost or cut, and no change in level at the center (0 dB) position. The frequency bands are: 63, 125, 250, 500, 1k, 2k, 4k, 8k and 16 kHz.

The EQ section comes after the main level [38], and just before the main meters [40]. Therefore, as you adjust the EQ, you can keep an eye on the meters in case you over-do it and take the levels into overload.

20 PPM1008

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.

38. MAIN LEVEL

This knob controls the overall level of ­the main mix, and affects the main meters [40], main line-level outputs [19], main sub out [18], and the main speaker-level outputs if the internal amplifiers are playing the main mix. The level adjustment occurs before the EQ [36].

This gives you ultimate control over your audience. Adjust it carefully, with your good eye on the meters to prevent overloading, and your good ear to the levels to make sure your audience is happy.