BSS Audio FCS-960 Owner's Manual - Manual (Page 14)

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FCS-930/960
Using the FCS-930/960
In general you would use this mode where amplitude cuts are primarily
being introduced. It still however, has many applications for sweetening
work as the combining response is still acceptably ripple free.
This third order variable filter sweeps from 20Hz to 250Hz at 18dB/oct
and provides extra equalisation in applications where precise control is
required on
the low frequency energy within a system. This can be required for
protecting loudspeakers from excessive cone excursion beyond their
design limits, for optimising amplifier headroom in passively crossed-
over loudspeaker systems by limiting wasted power at low frequencies,
or for increasing intelligibility in mainly voice based applications. Press
the associated switch to select the
filter, and the LED illuminates in confirmation. De selecting the function
removes the filter from the signal path completely.
This control is incorporated within the filter sections offering the facility
to balance the overall sound level, after setting the required equalisation.
It offers a range of ±10dB, the centre position being 0dB unity gain.
When the EQ IN switch is released (equalisation bypassed), the GAIN
control is also bypassed and does not affect the output signal level. This
allows proper A/B comparisons to be made of the program signal as the
EQ IN switch is operated.
The PEAK LED indicator monitors a number of points within the circuitry
and will indicate when the signal at any of the monitored points reaches
within 2dB of clip. This is only likely to occur if the input signal to the
unit is quite large and substantial boost equalisation is being used. In
either case the input signal to the FCS-930/960 needs to be reduced
accordingly. Should you be using large amounts of GAIN then this could
also cause the PEAK LED to indicate and suitable correction can be
applied by backing-off the GAIN control accordingly.
High Pass Filter
Gain Control
Peak LED