PRESONUS AI-Series Owner's Manual page 27

4 Controls
4.1 The Fat Channel
Low EQ On/Off Button. Turns
the Low Band EQ On/Off for the
Selected Input or Output Bus.
This button activates the
equalizer's Low band for
the selected channel or bus.
The button will illuminate to
indicate control is active.
The Low EQ band is available
for all 32/24/16 input channels
and every output bus.
Low EQ Frequency Control. Sets
and Displays the Center
Frequency of the Low EQ Band.
This encoder sets, and the meter
displays, the center frequency
of the equalizer's Low band.
The center frequency is the
middle of the passband (the
mean) between the lower and
upper cutoff frequencies that
define the limits of the band.
You can adjust the center
frequency from 36 to 465 Hz.
Low EQ Q Control (32.4.2AI and
24.4.2AI only). Sets and Displays
the Q of the Low Frequency
Band.
This encoder sets, and the meter
displays, the Q for the Low band.
The Q is the ratio of the center
frequency to the bandwidth.
When the center frequency
is constant, the bandwidth is
inversely proportional to the Q,
so as you raise the Q, you narrow
the bandwidth. 16.4.2AI users
can access the variable Low EQ
Q Control from VSL-AI and SL
Remote-AI.
StudioLive™ 32.4.2AI
Owner's Manual
Low EQ Gain Control. Sets and
Displays the Gain Attenuation or
Boost of the Center Frequency.
This encoder sets, and the meter
displays, the gain cut or boost
at the center frequency for the
Low band. The level of the center
frequency can be set between
-15 and +15 dB.
Low Shelf EQ Button. Turns on
the Low Shelving EQ for the
Selected Input or Output Bus.
When the Shelf button is not
engaged, the Low band is
parametric. Enabling the Shelf
button turns the Low band into
a low-shelving EQ that alters,
by a fixed amount, a band of
low frequencies at and below a
user-selected shelving frequency.
Power User Tip: A low shelving
EQ is like a bass-control knob
on a stereo. In this mode, the
Center Frequency control selects
the shelving frequency.
Low-Mid EQ On/Off Button.
Turns the Low-Mid EQ On/Off for
the Selected Input or Output Bus.
This button activates the
equalizer's Low-Mid band for
the selected input or output.
The button will illuminate to
indicate control is active.
The Low-Mid EQ is available
for all 32/24/16 input channels
and every output bus.
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