– 3 –
Placement
• As a general rule, bass
response increases as a
subwoofer is placed closer
to a wall. Therefore, bass
output is maximized when
the subwoofer is placed in
a corner.
• It is also recommended
that the subwoofer be
positioned along the
same wall as the front
loudspeakers.
Low-frequency sounds are
normally omnidirectional,
meaning the listener can’t
tell where they are generated
from. However, frequencies
between 75Hz – 150Hz can
be localized, especially at
higher volume levels.
Positioning your subwoofer
as recommended will provide
the most natural soundstage
and imaging from your loud-
speaker system.
Remember that these are just
guidelines. Since every listen-
ing room is different, JBL
strongly recommends experi-
menting with the positioning
of your subwoofer to obtain
the most pleasing results in
your
room. One technique that
can help you find the ideal
subwoofer location is to tem-
porarily place the subwoofer
near the main listening loca-
tion. Then move around the
room and determine where you
hear the most pleasing bass
performance. This would then
be the ideal location for the
subwoofer.
When we designed the
PSW-D112 powered subwoofer,
our goal was to offer the user
the best possible performance
combined with the most flexi-
ble and complete installation
options. Please look over the
following four examples to
determine which description
best matches your system and
follow the corresponding
hookup instructions.
1) If your receiver/amplifier
has no subwoofer
outputs or preamp
outputs for the left,
center and right
channels.
Hookup
Phase
0
180
High
Pass
60
180
120
90
150
Low
Pass
Out
Line Level
In
60
180
120
90
150
Off
On
Power
R
R
L
L
L
R
SPKR In
L
R
SPKR Out
RECEIVER/AMPLIFIER
– +
– +
– +
Left
Right
LEFT
SPEAKER
– +
RIGHT
SPEAKER
PSW-D112
Digital Amplification
PSW-D112 11/9/99 11:02 AM Page 3
