Behringer Stereo Equalizer Behringer Stereo Equalizer User Manual

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6 ULTRAGRAPH PRO FBQ6200/FBQ3102/FBQ1502 User Manual
Control Elements and Connectors2.
Front panel2.1
In this chapter we will describe various control elements of your equalizer.
All controls and connectors are explained in detail, and you will also nd useful
hints on how to best use them. Since the three equalizers in the FBQ series
are fairly similar, let’s start with the control elements of the FBQ1502 and
the FBQ3102 that are similar to the control elements found on the FBQ6200.
The FBQ6200 additionally features extra control elements that will be explained
in detail later on.
The (1) INPUT/OUTPUT LEVEL METER lets you keep an eye on the signal level
in order to avoid distortion. Depending on the position of the I/O METER
IN/OUT switch (2), the display shows either the input or the output signal
(switch depressed) level. When the signal level reaches roughly +18 dB,
that is, 3 dB below clipping starts to occur, the red CLIP LED lights up.
The level meter on the FBQ1502 displays only the output signal level.
Attention: extreme frequency boosts in connec tion with a high input ◊
signal level may lead to over driving your equipment. Should this
occur, it is necessary to reduce the input signal level by using the
INPUT control.
(4) (5)
(3)
(4)
(2) (1) (3)
(5) (6) (7)
(1)
(6)
(8) (9)
Fig. 2.1: Front panel control elements of the FBQ3102 (above) and of the FBQ1502 (below)
The (2) I/O METER IN/OUT switch lets you alternate between displaying the
input and the output signal level. When the switch is depressed, the output
signal level is shown. The FBQ1502 does not feature this switch.
When you press the (3) FBQ switch, the FBQ feedback detection system
is activated. The frequency (or frequen cies) that evoke feedback is/are
indicated by means of a lighted fader LED. All other LEDs are toned down.
Now, simply lower the respective frequency range somewhat until you
eliminate the feedback and the LED no longer lights up.
The (4) AUDIO IN/OUT switch is used to enable or disable the entire equalizer
section. The FBQ1502 does this electronically, while the FBQ3102 and the
FBQ6200 feature a relay-driven hard bypass function. As long as the switch
is not depressed or while the equalizer is not powered up, the inputs and the
outputs are directly connected to one another. The AUDIO IN/OUT switch is
used to alternate between A and B, i.e. to compare the original unprocessed
signal with the processed signal.
The (5) INPUT control is used to adjust the input signal level. You can boost/
attenuate the signal level from +15 to -15 dB.
The (6) LOW CUT control is used to adjust the lower cut-o frequency of your
ULTRAGRAPH PRO. The high-pass lter (18 dB/oct.) covers the range between
10 and 400 Hz, whereby the lter lets the signal pass through unprocessed,
when the control is in the 10 Hz position.
The FBQ1502 features a switchable high-pass lter (LOW CUT) instead of a
low cut control, and its cut-o frequency is 25 Hz.
The (7) HIGH CUT control is used to adjust the upper cut-o frequency of your
ULTRAGRAPH PRO. The low-pass lter (18 dB/oct.) covers the range between
2.5 and 30 kHz, whereby the lter lets the signal pass through unprocessed
when the control is in the 30 kHz position.
Use the high-pass and low-pass filters to define the frequency range ◊
you wish to process. This provides you with an efficient way to limit the
bandwidth you work with.
The (8) RANGE switch lets you alternate between the maximum value
of lowering/increasing of individual frequencies from 12 dB to 6 dB
(switch depressed).
These are the (9) 31 SLIDING CONTROLS (FBQ1502: 15 sliding controls per
channel) for individual frequency bands. When in “0” position, the particular
frequency range is not processed at all. To boost a frequency range, pull the
sliding control upward; to attenuate, pull the sliding control downward.
To emphasize a frequency range, you don’t necessarily have to move ◊
its respective sliding control upward; try lowering surrounding
frequency ranges instead. This way, you avoid causing the next piece of
equipment in your sound path to overdrive. You also preserve valuable
dynamic reserve (“headroom”).
Sliding controls feature LEDs that indicate the signal level of their particular
frequency ranges through their varying illumination intensity: what better
way to show critical frequencies that evoke feedback. How to best use
your ULTRAGRAPH PRO to detect these critical frequencies is described in
chapter 3.2.1.
Rear panel2.2
(10)
(11) (12) (13)
Fig. 2.2: Control elements and important information on the rear of the FBQ3102

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