2
ABOUT THE FBX2020-Plus
FREQUENCY RESPONSE: FBX 1/10-Octave Filter Vs. 1/3-
Octave Graphic EQ Filter (12 dB depth; Log Scale).
A DIRECT HIT ON FEEDBACK! The FBX targets feedback without
taking a big chunk out of your sound. Tests prove that a single 1/3-
octave EQ slider pulled down 12 dB removes almost half the power
going to the speakers over a two-octave range. And, as this illustra-
tion shows, you can't place a graphic EQ filter precisely on the ringing
frequency. When you pull down multiple sliders in a normal setup
(below), you end up with giant holes in your music. On the other hand,
FBX micro-filters are 10 times narrower - you get back up to 90% of
the power you lose with a graphic EQ! That means more gain before
feedback and no loss in sound quality.
FREQUENCY RESPONSE:
Full Set-Up FBX Vs. 1/3 Octave Graphic Equalizer. Test
procedure: A PA system was set up using a microphone,
mixer, FBX, power amp and two speakers. The system's
gain was raised until the FBX removed nine feedback points.
Next, the FBX was replaced with a 1/3 octave graphic EQ.
The EQ was adjusted while the system gain was raised to
the same level achieved with the FBX. The frequency
response curves of each device were then plotted.
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
WORLD'S BEST FEEDBACK CONTROLLER:
Before the invention of the FBX, the most common device for controlling feedback was the 31-band graphic EQ. However, the
FBX has three distinct advantages. The most obvious is that the FBX functions automatically, even during the program. Second,
the FBX micro-filters are precisely placed while EQ filters are fixed. The difference: FBX filters do not have to be as deep or wide,
so there is more system gain. The third most important advantage is that FBX micro-filters are ten times narrower than 31-band
EQ filters. FBX micro-filters return up to 90 percent of the power removed by EQ filters.
Over the years, engineers stopped using 12-band EQs in favor of the narrower-filter 31-band EQ for controlling feedback. The
FBX represents the next step. An EQ would need more than 10,000 sliders to be equivalent to your FBX. With the FBX2020-
Plus, your monitors will finally sound loud enough, everyone in the audience will understand each word, and the mains will
sound natural and transparent.
WHO NEEDS THE FBX?
Virtually every sound system will be improved with the FBX. Small bands that do not have sound technicians can now 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 centers around the world can
offer meeting rooms with sound systems that won’t howl during programs. The FBX2020-Plus can be installed in theaters,
schools, sports arenas, courtrooms -- anywhere multiple microphones are used. It can also be used for teleconferencing,
intercoms or interactive remote classrooms.
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. The FBX delivers superior sound quality automatically.
