Using The High And Low Eq Controls - Alesis Studio 12R Reference Manual

Using the HIGH and LOW EQ controls

The Studio 12R provides standard shelving EQ controls on each
channel. The HIGH knob range is +/- 15 dB with a shelving
frequency of 12 kHz. "Shelving" means that all frequencies above
12 kHz will be boost or cut by the same amount , and frequency
response between 1 kHz and 12 kHz will gradually rise or fall to the
shelving point. The LOW knob range is +/- 15 dB at a shelving
frequency of 80 Hz. This means that frequencies below 80 Hz will be
boosted or cut by the same amount, and frequency response will
gradually rise or fall from 80 Hz to about 1 kHz. The frequency
response range is shown in the curve below:
+15 dB
-15 dB
20 Hz
The normal position for the EQ controls is "12 o'clock" or straight
up. A "click" or detent will be felt at this position. At this position,
the EQ does not affect the frequency response of the channel--it is
"flat".
Use only the amount of EQ necessary to achieve the desired effect.
Excessive boost on either EQ section may cause clipping in the
channel electronics, and will amplify noise.
Studio 12R eference Manual
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