Studio Technologies 65 - Manual (Page 17)

Model 65 User Guide Issue 4, January 2004
Studio Technologies, Inc. Page 17
for Surround
(crossover) between the main channel
loudspeakers and the bass management
audio signals being reproduced by the
subwoofer(s). Only by studying the entire
monitoring configuration can a correct
selection be made. Personal taste and
philosophy play a major role in decisions
like these. Some people prefer crossover
slopes of 24dB-per-octave, while others
prefer the more gentle 12dB-per-octave.
Don’t minimize the impact that a little plan-
ning can have on a system’s performance.
Low-Pass Filter Slope Selection
Each of the five main input channels (L, C,
R, LS, and RS) includes a low-pass filter
section. These filter sections separate the
audio-frequency content that will be routed
to either or both of the subwoofer outputs.
Each filter section is implemented by cas-
cading (connecting is series) two identical
filter circuits. Each filter circuit has a slope
of 12dB-per-octave and is factory selected
to have its –3dB point at nominally 80Hz.
Option jumpers are provided to allow the
slope of the signal going to the subwoofers
to be 12- or 24dB-per-octave. Refer to
Figure 5 for a detailed view of the jumper
locations.
From the factory the jumper locations are
configured for 24dB-per-octave. This is
appropriate for applications where a rela-
tively steep crossover slope is desired.
There are situations where selecting the
12dB-per-octave setting may be appropri-
ate. Specific examples are hard to provide
as the number of different monitoring
Figure 5. Low-Pass Filter Slope Selection