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– 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 and PSW-D115
powered subwoofers, our goal
was to offer the user the best
possible performance com-
bined with the most flexible
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
60
180
120
90 150
Off On
Power
Direct
L
I
N
E
O
U
T
L
I
N
E
I
N
L
C
R
L
C
R
SPKR In
L
C
R
SPKR Out
RECEIVER/AMPLIFIER
– + – +
– +
– +
Left Center Right
LEFT
SPEAKER
– +
CENTER
SPEAKER
– +
RIGHT
SPEAKER
PSW-D112/115 9/11/98 11:44 AM Page 3