BSS Audio FDS-318 Owner's Manual - Manual (Page 9)

9
BSS Crossovers
5.0 What is special about BSS Crossovers?
The FDS-318 is an electronic crossover offering many modes of operation to
suit professional sound systems, and also to support equipment rental
companies in reducing crossover inventory by having an easily re-configurable
loudspeaker system controller.
The FDS-318 fully supports stereo 3-way, stereo 4-way, or four separate
channels of 2-way operation, all in a 1U package. The internal switching of
circuitry is automatically controlled by information held within a digital PROM
memory device, such that the operator needs no additional knowledge other
than the mode the currently required. As with other BSS crossover products,
output sections not used within a given configuration are always available as
full range buffer drivers. An important part of any electronic crossover is the
filter type, and todays industry standard series Butterworth filters, pioneered by
BSS Audio since 1979, is available in the FDS-318 in the form of the fourth
order Linkwitz-Riley design. These provide the necessary in-phase outputs and
steep 24dB/Oct slopes required to give the best constant voltage summation
and minimal lobing for non-coincidental drivers. These filters are fully
sweepable by accurate front panel controls, which are also automatically
reconfigured depedant upon the mode of operation selected.
Some of the features available within the FDS-318 are:
• Stereo 4-way, stereo 3-way, four channels of 2-way in a 1U unit.
• Linkwitz-Riley fourth order filters with sweepable frequency selection.
• Digitally controlled mode selection, offering extended range selection and
features.
• Electronically balanced inputs and floating balanced outputs.
• Constant directivity equalisation externally selectable for all HIGH outputs.
• Polarity reverse, mute selection and signal LED indication for each output.
• MONO LOW selection for all stereo modes.
• Comprehensive mode selection indication, identifying the function of each
control.
• Full range buffer outputs on all non-used section.
As part of BSS' system of quality control, this product is carefully inspected
before packing to ensure flawless appearance.
After unpacking the unit, please inspect for any physical damage and retain the
shipping carton and ALL relevant packing materials for use should the unit
need returning.
In the event that damage has occurred, please notify your dealer immediately,
so that a written claim to cover the damages can be initiated. See Section 14.
6.0 Unpacking
Unpacking