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About the Function
Setting Switches
* Except for FILTER WIDE, changing a setting has an
immediate effect on the function.
FILTER WIDE
Switches the bandwidth of the anti-feedback filters
when set with Auto Adjust. For a more detailed
explanation, see "About Anti-Feedback Filter
Bandwidth" (page 12).
DYNAMIC
This function constantly monitors the reproduced
sound, and at the first sign of feedback, it instantly
counteracts it, suppressing the feedback. Two anti-
feedback filters, assigned for the Dynamic Adjust
function, track and eliminate any new occurrence of
feedback. These filters have a 1/6-octave bandwidth.
DIFFUSE
The frequency at which feedback occurs is ordinarily
determined by the distance between the microphone
and speakers. Given a fixed microphone and speaker
placement, and an unchanging volume level,
feedback will gradually increase once it occurs.
However, by moving the microphone, you can cause
the frequency at which feedback is occurring to shift,
and suppress the growth of feedback.
The Diffuse function creates such changes in a virtual
manner. It is also effective in reducing the unpleasant
ringing and coloration that can occur at word endings.
LIMITER
Limits excessively high input levels, preventing the
distortion that results from overload.
ENHANCER
Enhances voice contour and consonants, and im-
proves the articulation of amplified sound, making
speech more intelligible.
* Note that while you have the Enhancer switched on,
some distortion may occur, even though the Peak
indicator has not lighted.
LOW-CUT/HI-CUT
Cuts both the low-end and high-end frequencies that
are unnecessary for listening to ordinary voices.
Effective against hiss and bass rumble circulating
from floors.
When using the unit by
itself
If you will be using this unit by itself, without using the
optional RAF-70 rack mount adaptor, attach the
included rubber feet as shown in the illustration.
Option
With the optional RAF-70 rack mount adaptor, a row
of up to three AF-70s can be mounted in an EIA-1U
rack.
13
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