Sabine first invented digital feedback control in 1991, FBX Feedback Exterminators
have set the standard for transparent and reliable automatic feedback
control. Now Sabine is proud to announce the next generation of automatic
feedback controllers: The FBX1200 and FBX2400, now with SMARTFilter™
POWER OF FBX
The power of the FBX with SMARTFilters lies in its ability to control
feedback during the program, not just at setup time. If feedback occurs
during that crucial moment of the show, in the middle of the big solo,
or just when the worship leader begins the sermon, the FBX places a
filter that only kills the feedback, not the sound and power you work
so hard to achieve.
Think of the FBX as a very advanced set of automatic
parametric filters. If you had the time, the filters, and the test equipment,
you could find the feedback frequencies, dial in the precise filter
location, and make a very narrow filter, just deep enough to remove
the offending tone. The FBX does it all for you auto-matically, and
it does it faster than any other method.
How do we do it? First let’s consider just how a superior feedback
control filter should behave. Filters can be described by their Speed,
Accuracy, Resolution, and Sonic Integrity.
The industry’s best digital signal processors that run the SMARTFilter
algorithm give the new FBX1200 and 2400 a distinct speed advantage over
all other automatic feedback controllers. And in Setup Mode the speed
is increased, so you can complete your entire setup of the FBX in less
than 30 seconds. During the show the 24-bit FBX is constantly on the watch
for feedback, never allosing it to ruin your show. Filters are placed
almost immediately (in 0.4 seconds at 1 KHz.)
This is a big one. Now that we know feedback is happening, we need to
target it precisely. Many feedback controllers place their filters in
the general vicinity of the feedback and then widen the filters until
the feedback goes away. The FBX uses a more sophisticated solution. It
centers the filter exactly on the frequency that is feeding back. This
unique one-Hertz resolution enables the FBX to control feedback with transparent
filters that are ten times narrower than graphic equalizer filters, which
can only muster 31 spots to place their very wide filters. Feedback frequencies
are single tones, and that means there can be almost 20,000 places for
them to occur in the audio spectrum. You can see that using a feedback
control device with less resolution is like shooting a fly with a shotgun.
You may eventually get that fly, but it will take a lot of shooting and
cause a lot of damage!
contrast, the FBX 1200 and 2400 place these accurately chosen filters
with on Hz resolution. this means a direct hit on a single feedback tone
- every time.
Filter quality: True Constant Q filters maintain width at any depth when
measured at the -3 dB power point. Sabine uses this most rigorous method
for computing filter width.
Sabine’s innovative approach to digital filtering is unique in the
industry. Our filters just sound better, with far less phase distortion
and a smoother response. Sabine filters maintain their integrity at all
depths, providing true Constant Q performance.
Some competitors tout the benefits of more filters, but why add more filters
than you need? The FBX processor could easily produce 50 filters if we
wanted them, but they would only degrade your sound. Our experience proves
that twelve feedback filters per channel is the right number. More filters
just cut into the quality of your sound.Some competitors tout ever narrower
filters. The FBX processor can easily produce filters that are 1/100 of
an octave wide, but our experience teaches us that filters narrower than
1/10 of an octave allow the feedback to return with very little provocation.
Sabine filters are transparent to the ear and offer the ideal balance
of width and protection against feedback under shifting conditions. Making
them narrower ultimately degrades their performance, and we won’t
The FBX1200 and 2400 give you the easiest, fastest, and quietest setup
procedure. In less than 30 seconds you will be ready to begin your performance,
and the whole process is so quiet you can almost do it without anyone
knowing it is happening!
Even with all the improvements of SMARTFilters, and the improved specs
and audio performance, perhaps the best news is that we lowered the price!
And the FBX Feedback Exterminator is made in the USA. Call us or head
to your nearest Sabine dealer and try the new FBX for yourself. You will
hear your sound and nothing else!
Is it music or is it feedback? This is the most difficult question your
feedback controller must answer. A wrong decision means you waste filters
(less gain for you) and punch unnecessary holes in your sound. The FBX
has always excelled in its ability to make the right decision, and the
new SMARTFilter technology makes it even better. Less sophisticated feedback
controllers place filters on any loud tone, even if it is music, but the
FBX uses a patented analysis of the harmonic content of your program material.
Because feedback is low in harmonics, and music and speech are rich in
harmonics, the FBX is able to make the correct and accurate answer to
the music or feedback question.
MULTI-COLOR FILTER DISPLAY
the super-fast setup is complete the bright blue LED on the Ready button
clearly tells you the show can begin, and you’ve got all the extra
gain you need. You have complete control of the mix between filter types
(see the Fixed and Dynamic Filter box above), and the bright, three-color
LED display shows you your filter status at all times – you can
see it from across the room!