Behringer Shark FBQ100 User Manual
4
SHARK FBQ100 User Manual
1. Introduction
1.1 The concept
With the SHARK FBQ100 you purchased a device that combines an automatic
Feedback Destroyer using the ingenious search algorithms of our FEEDBACK
DESTROYER FBQ1000, a variable Delay Line (adjustable in msec, feet and
meter), a ULN (Ultra-Low Noise) microphone pre-amp with Phantom Power,
an automatic Noise Gate, a variable Low Cut filter and a Compressor—all in
one ultra-rugged and compact case. Still, the SHARK can be operated intuitively
and expanded to a multi-channel system using another four SHARKs and
an optionally available 19" rack mount kit. The SHARK’s 24-bit A/D and D/A
converters guarantee a precise reproduction of your program material.
High volume levels and the use of ever more sophisticated monitoring systems
High volume levels and the use of ever more sophisticated monitoring systems
with a multitude of speaker cabinets have led to a greater potential risk of
feedback loops in sound reinforcement systems. So far, audio engineers
have been using conventional 1/3-octave equalizers to suppress unwanted
feedback. However, the individual filters of such an EQ, with their relatively
wide bandwidth, have quite an impact on the sound image. With the
BEHRINGER SHARK (minimum bandwidth: 1/60 of an octave) you are now free
to either choose the trial and error method to suppress feedback with graphic
equalizers, or to assign this task to the FBQ100, so that you can give your
music your undivided attention. Using extremely narrow-bandwidth filters,
the SHARK FBQ100 eliminates only unwanted feedback, without affecting
your music.
Speaker Box
Microphone
Mixing Console
Power Amp
Fig. 1.1: Typical feedback loop
1.2 Before you begin
Your SHARK was carefully packed in the factory and the packaging is designed
to protect the unit from rough handling. Nevertheless, we recommend that you
carefully examine the carton and its contents for any signs of physical damage,
which may have occurred during transit.
◊
If the unit is damaged, please do not return it to BEHRINGER, but notify
your dealer and the shipping company immediately, otherwise claims
for damage or replacement may not be granted. Shipping claims must
be made by the consignee.
your dealer and the shipping company immediately, otherwise claims
for damage or replacement may not be granted. Shipping claims must
be made by the consignee.
The optionally available rack mount kit allows you to mount your BEHRINGER
SHARK in a standard 19" rack, together with another four SHARKs. The rack
mount kit requires 2U of rack space.
Be sure that there is enough air space around the unit for cooling and please do
Be sure that there is enough air space around the unit for cooling and please do
not place the SHARK on high-temperature devices such as power amps, etc. to
avoid overheating.
Please use the enclosed power supply to connect the unit to the mains.
The supply complies with all applicable safety standards.
◊
Please note that all units must be grounded properly. For your own
safety, you should never remove any ground connectors from electrical
devices or power cords or render them inoperative.
safety, you should never remove any ground connectors from electrical
devices or power cords or render them inoperative.
Further information can be found in chapter 3 “Installation”.
As a standard the audio inputs and outputs of the BEHRINGER SHARK FBQ100
As a standard the audio inputs and outputs of the BEHRINGER SHARK FBQ100
are fully balanced. If possible, connect the unit to other devices in a balanced
configuration to allow for maximum interference immunity. The automatic servo
function detects unbalanced connections and compensates the level difference
automatically (6 dB correction).
1.3 Control elements
(1)
(9)
(10)
(11)
(12)
(13)
(2)
(3)
(4)
(5)
(7)
(6)
(8)
Fig. 1.2: Front panel control elements of the FBQ100
(1)
The CLIP LEVEL METER shows you whether or not the digital circuitry is
driven correctly. Any corrections can be made with the CLIP LEVEL control
(2)
. Be sure that the CLIP LED won’t light up.
(2)
The CLIP LEVEL control lets you adapt the internal gain optimally to the
digital circuitry. If gain is too high (CLIP LED lights up), raise the CLIP LEVEL
value by turning the control to the right (and vice versa). Thus, you can shift
the operating level upwards/downwards.
◊
The CLIP LEVEL control does not affect the input/output levels,
but adapts the audio signal as optimally as possible to the threshold of
the digital circuitry.
but adapts the audio signal as optimally as possible to the threshold of
the digital circuitry.
(3)
These five LEDs symbolize the units of the parameters that can be adjusted
on the display
(4)
.
(4)
The 4-digit DISPLAY reads the absolute values of the adjusted parameters.
(5)
The FB-D FILTER STATUS LEDs display the status of each of the 12 individual
filters. The SHARK uses four different filter modes:
•
Disabled filters (which can be re-enabled with the ACTIVE button). When a
filter is off, its LED is not lit.
•
Free filters which automatically search for feedback frequencies and whose
activity is shown by a flashing LED.
•
Set filters which can be reconfigured as free (searching) filters, when all
filters are currently in use.
•
Permanently set filters which must be RESET to be reconfigured as
free filters.
Once a filter has been set, its LED lights up.
Once a filter has been set, its LED lights up.