How To Use The "Lock Fixed" Feature; Limiting Total Number Of Active Filters; Selecting Filter Width; Engaging The Noise Gate - SABINE FBX SOLO SL-820 Operating Manual

HOW TO USE THE "LOCK FIXED" FEATURE

In certain situations the FBX may mistake music for
feedback and drive the fixed filters deeper than
necessary, like in a church with a pipe organ or
during a performance with a great deal of intentional
sustained electric guitar feedback. You may pre-
vent the fixed filters from deepening beyond their
initial depth by pressing the Lock Fixed button on the
front panel AFTER setting the fixed filters as de-
scribed previously. The Lock Fixed LED will light to
indicate that the FBX is in Lock Fixed mode. The
fixed filters will stay locked until you press the Lock
Fixed button again. The dynamic filters are not
affected. In almost every situation, it is best to
lock the fixed filters right after the initial setup.

LIMITING TOTAL NUMBER OF ACTIVE FILTERS

You may choose to limit the total number of active
filters for each application by using the Lock Fixed
button. For example, if you wish to use only three
fixed and one dynamic filter, set the FBX so there are
seven fixed and one dynamic filter. Then during the
setup procedure, simply press the Lock Fixed button
after setting the first three fixed filters. The remain-
ing four fixed filters will be locked in their zero
position.

SELECTING FILTER WIDTH

If the SOLO is to be used for a music application, 1/10-
octave filters are most effective. However, in spoken
word applications, such as lectures or teleconferenc-
ing, the wider 1/5-octave filters are recommended.
Select the filter width using the switch on the SOLO
back panel. The change takes effect only on power-
up. Selecting a new width has no effect unless you
power down and then power up again.

ENGAGING THE NOISE GATE

One outstanding feature of your FBX-SOLO is a user-
selectable noise gate. It acts as an automatic switch
that opens a microphone only when someone is
speaking directly into it. A noise gate is especially
useful in systems that have a number of open micro-
phones, such as courtrooms, conference rooms, or
parliament buildings. Gating microphones greatly
reduces the number of possible feedback points in
the room and allows for more system gain.
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