Studio Technologies 65 - Manual (Page 18)

Issue 4, January 2004 Model 65 User Guide
Page 18 Studio Technologies, Inc.
for Surround
arrangements is enormous. The key to
successful selection is to ensure that the
low-pass filter slope meets the exact needs
of the monitoring system.
Subwoofer Assignment
Each of the five main input channels (L, C,
R, LS, and RS) includes a low-pass filter
section. The output of these filters is the
“bass management” signal that is routed to
either or both of the subwoofer output chan-
nels. The LFE input channel is also routed
to either or both of the subwoofer outputs.
Option jumpers, located on the printed
circuit board, allow selection of the desired
routing. Refer to Figure 6 for a detailed view
of the jumper locations. The choices are
Sub 1, Sub 2, or both Sub 1 and 2. An
attenuation (level drop) of 6dB is imple-
mented whenever the routing is selected for
both Sub 1 and Sub 2. This feature is impor-
tant, preventing low-frequency level buildup.
From the factory the subwoofer routing
for the five main inputs and the LFE input
is selected to be Sub 1. This is appropriate
for applications where a single subwoofer
loudspeaker will be utilized. The jumpers
can easily be changed to support an alter-
nate configuration. There are many opinions
as to how subwoofers should be used in a
listening environment—almost as many as
there are opinions as how to correctly make
a martini! In some cases, two sub-woofers
might be used in a “stereo” configuration.
One may be designated as sub left, the
other as sub right. In this case, main input L
and LS signals might be assigned to Sub 1,
R and RS would be assigned to Sub 2,
while C and LFE would be assigned to both
sub outputs. Another application might find
one subwoofer used for the main input
channels and the second for the LFE chan-
nel. In this case L, C, R, LS, and RS would
be assigned to Sub 1, while LFE would be
assigned to Sub 2.
Figure 6. Subwoofer Assignment