Typical Applications; Stereo 2-Way With A Mono Sub-Bass; Dual Bi-Amp (Stage Monitors); 5-Way Zoning Distribution - BSS Audio FDS 355 User Manual

Typical Applications

14.0 Typical Applications
The FDS-355 has three inputs: A, B, C. An internal mono sum of inputs A & B
is also available for routing to any of the outputs. Any combination of routing
inputs to outputs is available, and the FDS-355 can be configured as a stereo
or mono device.
14.1 Stereo 2-Way Systems can be run as simple stereo 2-Way, or with an additional sub-bass
output (Mono). This sub-bass can be derived from either a mono sum of the
with a mono sub-
stereo inputs, or from a separate input using an aux send from the console.
bass.
To use the FDS-355 in this mode, configure the unit as 2 X 2+1 (stereo) in the
Configuration screen of the Utilities menu.
Use inputs A and B for the stereo inputs, and Outputs 2-5 for the Output bands
(Bands 2 and 3 are Lo left and right, and bands 4 and 5 are Hi left and right
respectively). The sub output 1 should be sourced from the mono sum A+B, or
input C for an independent sub-bass feed.
The Stereo Link ON mode allows the same parameters on the left and right
channels to be adjusted simultaneously and any edits made Unlinked are
preserve the left/right difference as an offset.
The FDS-355 can provide 2 channels of bi-amp crossover for monitor racks
14.2 Dual Bi-amp
with EQ, delays, and limiters. With so much EQ available in the FDS-355, it
(Stage monitors)
is easy to assign 12 bands of EQ to the input, as well as EQ to the output
bands, saving the need for external EQ.
For example: Input A would feed Outputs 1 and 2, with Input B feeding
outputs 3 and 4. Set the configuration to Mono in the Utilities menu, and
adjust the SOURCE mode accordingly.
In this mode, it is possible to remove 'hot spots' on stage. Where the same
mix is sent to a number of performers, interaction between wedges can create
lobes of high intensity which creates confusion. Using a fine delay to shift
wedge feeds can move these hot-spots to less sensitive areas on stage.
14.3 5-Way zoning The FDS-355 can be also be used as a zone distribution system, without using
any of its crossover facilities. Using this mode, a common input signal can be
distribution
routed to up to 5 separate outputs, each with delays, EQ and limiters.
Typical uses for this mode would include feeding a number of under-balcony
loudspeakers with integral passive crossovers, using the delays of the FDS-355
for time correction, and EQ for tuning response. For this application, each
output should be full range, unless you particularly want to band restrict the
outputs.
Use the Xover Freq screens in the Outputs Menu to set each band edge to be
OUT.
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