SABINE FBX 901 Mode D'emploi

CONGRATULATIONS! You now have the state-of-the-art
feedback control.
WHAT IS THE FBX FEEDBACK
TheSabine FBX-901 automatic
adaptive digital signal processor (DSP) controlled filtering device
which automatically finds and eliminates feedback in sound
systems. It does it quicker and with less tonal degradation than
any other method.
WHAT DOES IT DO?
The FBX•901 quickly senses feedback
in a sound system and
determines its pitch. It
then assigns one of its
very narrow digital notch
filters to the resonating
frequency and eliminates
the feedback in less than a second.
every case, the FBX automatically controls feedback faster, and
with less sound field distortion, than the best graphic or paramet-
ricequalizer.
HOW DOES IT WORK?
The FBX utilizes nine narrow band, independent, digital notch
filters - any of which may be "Fixed" or "Dynamic." The user
selects the number of Fixed versus Dynamic filters. The Fixed
filters enable increased gain before feedback. The FBX sets the
Fixed filters to control the strongest feedback frequencies. The
Fixed filters remain set on the strongest resonating frequencies
until the user resets the FBX. The Dynamic filters control
intermittent feedback that may develop or change during a
program. They are automatically reassigned new frequencies as
feedback occurs. Total feedback
less program degradation than with any other method.
PROBLEMS WITH GRAPHIC
Until the introduction ofthe FBX, parametric and graphic
equalizers were the only practical devices available for controlling
feedback in live performances. The disadvantage is that manual
operation of both parametric and graphic EQs is too slow. A
sound technician must be on duty during the entire program,
ready to jump at the first sign of feedback. Once feedback
occurs, the technician must determine which slider controls the
• The FBX-901 has an improved
algorithm that allows it to better
distinguish the difference be-
tween feedback and music,
greatly reducing the chance for
error.
• It has improved shielding that
prevents interference with broad
band wireless microphone
The FBX Feedback Exterminator is a registered trademark of Sabine, Inc., and is the brand name of its line of automatic feedback
controllers. Covered by U.S. Patent No. 5,245,665 Other patents pending.
in
EXTERMINATOR?
feedback controller is an
In almost
control is now achieved with
EQUALIZERS:
SPECIAL FEATURES
systems.
• The FBX-901 is designed even
more efficiently than previous
models. There are fewer parts,
yet it has improved feedback
control and tonal clarity. That
translates to greater effective-
ness and reliability.
• A new LOCK
OPERATING
feedback frequency and how much attenuation is necessary.
This process takes too much time and is prone to error.
There is a common misconception that 1/3 octave EQ filters are
only 1/3 of an octave wide. Actually, most are about one full
octave wide. However, they are placed on 113octave center
points, hence their name. The FBX-901 has the flexibility to
place the center point of its feedback filters within 1/20 of an
octave of the actual feedback frequency so the filters only need
to be 1/10 octave wide. In fact, all nine FBX filters cause much
less sound field distortion
WHO NEEDS THE FBX?
Virtually every sound system will be improved with the FBX.
Small bands that do not have sound technicians
increase their monitor volumes so they can hear themselves
clearly and with full fidelity, without worrying if the program is
going to be ruined by feedback.
Auditoriums and churches of all sizes will enjoy reliable feedback
control. Hotels and conference
offer meeting rooms with sound systems that won't howl during
programs.
Professionals mixing sound for large bands are often simulta-
neously responsible for a number of performers - each of whom
has separate monitor mixes. If feedback occurs, it is very difficult
to tell which of the many monitor mixes is resonating. IfFBXsare
substituted for graphic EOSfor feedback control, the feedback
will automatically be eliminated without any effort from the sound
technician.
WHY THE FBX?
The simple beauty of the FBX is its ability to quickly and
effectively eliminate feedback with narrower filters than ever
before possible. T he FBX delivers superior sound quality
automatically.
OF THE FBX-901
freezes
during set-up. The filters still
eliminate feedback, but they will
not get any deeper than the
original setting.
• FBX users
number
application by following a simple
procedure during set-up.
FIXED button
than two 1/3 octave EQ filters.
•901
can now
centers around the world
the Fixed filters created
can limit the total
of active filters for each
OSabine
can