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Model
PSW-D112 (serv.man2)
Pages
8
Size
83.11 KB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
Audio
File
psw-d112-sm2.pdf
Date

JBL PSW-D112 (serv.man2) User Manual / Operation Manual ▷ View online

– 5 –
4) If your receiver/ampli-
fier has preamp output
jacks and main input
jacks for the left and
right channels, or you
have a separate preamp/
processor and 
power amplifier.
This method of hookup can
offer the highest level of 
performance for your 
complete loudspeaker system.
The PSW-D112 incorporates a
variable high-pass crossover
in addition to a variable low-
pass crossover. When hooked
up as shown, the subwoofer
will limit the low-frequency
information that is returned
to your receiver/amplifier.
Your receiver/amplifier does 
not need to waste valuable
power reproducing the low
frequencies. In addition,
since no low-frequency 
information is being sent 
to your main loudspeakers,
they are able to reproduce 
mid and high frequencies
with greater clarity.
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
MAIN SPEAKER OUTPUT
RIGHT
+     –
RIGHT
LOUDSPEAKER
LEFT
+      –        –      +
–    +
LEFT
LOUDSPEAKER
PSW-D112
Digital Amplification
PRE 
OUT
MAIN
IN
PSW-D112  11/9/99  11:02 AM  Page 5
– 6 –
Operation
Power
When the unit is plugged in
and power is on and no signal
is received, the LED on the
front of the unit will turn red.
When a signal is present, the
LED will turn green. Note: It
will take several minutes for
the LED to turn from green to
red after the input signal to 
the subwoofer is removed.
Due to JBL’s unique, high-effi-
ciency digital-amplifier design,
power consumption is minimal
when the subwoofer is not
receiving a signal. Of course,
the subwoofer can be turned
off, whenever desired.
Low-Pass Control
The Low-Pass control deter-
mines the highest frequency at
which the subwoofer reproduces
sounds. If your main speakers
can comfortably reproduce
some low-frequency sounds,
set this control to a lower 
frequency setting, between
50Hz – 100Hz. This will 
concentrate the subwoofer’s
efforts on the ultradeep bass
sounds required by today’s
films and music. If you are
using smaller bookshelf 
speakers that do not extend to
the lower bass frequencies, set
the low-pass crossover control
to a higher setting, between 
120Hz – 180Hz. 
High
Pass
60
180
120
90
150
Low
Pass
60
180
120
90
150
High-Pass Control
• If you hooked up your sub-
woofer as shown in Hookup 4
on page 5, you also have
the capability of adjusting
the high-pass frequency. 
The High-Pass control 
determines the frequency at
which the main speakers
will start reproducing
sounds. If your main speak-
ers can comfortably repro-
duce some low-frequency
sounds, also set this 
control to a lower frequency
setting, between 50Hz –
100Hz. This will concentrate
the subwoofer’s efforts to
the ultradeep bass sounds,
while your main speakers
continue to reproduce the
mid-bass information. If you
Level Control
The subwoofer Level Control,
located on the front panel,
adjusts the volume of the 
subwoofer relative to the rest
of the system. Proper level
adjustment depends on several
variables such as room size, 
subwoofer placement, type of 
main speakers and listener
position. Adjust the subwoofer
level so that the volume of
the bass information is pleas-
ing to you.
Crossover Adjustments
are using smaller bookshelf
speakers that do not extend
to the lower bass frequencies,
set the high-pass crossover
control to a higher setting,
between 125Hz – 180Hz.
With this setting, your main
speakers will not have the
burden of reproducing any
low-frequency sounds.
• If you hooked up your sub-
woofer as shown in Hookup 1
on page 3, the high-pass
frequency is fixed at 180Hz. 
• If you hooked up your 
subwoofer as shown in
Hookup 2 or Hookup 3 on
page 4, no high-pass 
control adjustments can be
made from the subwoofer.
Unless your receiver/ampli-
fier incorporates a high-pass
crossover, your main speak-
ers will continue to get a
full-range signal.
Final adjustment and blending
of the low-pass and high-pass
controls may evolve over sev-
eral listening sessions. A good
starting point would be to set
both the low- and high-pass
controls to the same frequency
and adjust from that point. 
Video Contour
The video-contour switch,
located on the front panel,
optimizes the subwoofer’s 
performance for movie listen-
ing. When the video-contour
switch is “on,” the subwoofer’s
performance is tailored to
deliver the impact and 
excitement of today’s movies.
The green LED will illuminate
when the video-contour switch
is on.
PSW-D112  11/9/99  11:02 AM  Page 6
– 7 –
The Phase Control determines
whether the subwoofer 
speaker’s piston-like action
moves in and out with the
main speakers, 0°, or opposite
the main speakers, 180°. There
is no correct or incorrect set-
ting. Proper phase adjustment
depends on several variables
such as subwoofer placement
and listener position. Adjust
the phase switch to maximize
bass output at the listening
position.
Phase Control
Remember, every system,
room and listener is different.
There are no right or wrong
settings; this switch offers
the added flexibility to adjust
your subwoofer for optimum
performance for your specific
listening conditions. Should
you decide to fine-tune your 
system for optimum 
performance, be patient and
trust your ears. It will be
worth the effort involved to
fully “tweak” your system.
Troubleshooting
If you used the high-level
(speaker) inputs and there 
is no sound from any of the
speakers:
• Check that receiver/amplifier
is on and a source is playing.
• Check that powered sub-
woofer is plugged in.
• Check all wires and connec-
tions between receiver/ampli-
fier and speakers. Make sure
all wires are connected. Make
sure none of the speaker wires
are frayed, cut or punctured.
• Review proper operation 
of your receiver/amplifier.
If there is low (or no) bass
output:
• Make sure the connections
to the left and right “Speaker
Inputs” have the correct 
polarity (+ and –).
• Make sure that the sub-
woofer is plugged into an
active electrical outlet.
• Adjust the crossover point.
• Flip the Phase Control switch
to the opposite position.
• If you are using a Dolby*
Digital/DTS® receiver or 
processor, make sure that the
subwoofer adjustments on 
the receiver/processor are 
set up correctly.
• Slowly turn the Level 
Control clockwise until you
begin to hear the desired
amount of bass.
If you used the line-level
inputs and there is no sound
from the subwoofer:
• Check that receiver/amplifier
is on and a source is playing.
• Check that powered sub-
woofer is plugged in.
• Check all wires and con-
nections between receiver/
amplifier and subwoofer. Make
sure all wires are connected.
Make sure none of the wires
are frayed, cut or punctured.
• Review proper operation of
your receiver/amplifier.
• Slowly turn the Level 
Control clockwise until you
begin to hear the desired
amount of bass.
• Make sure that you have
configured your receiver/
processor so that the sub-
woofer/LFE output is on.
PSW-D112  11/9/99  11:02 AM  Page 7
©
1999 JBL, Incorporated
JBL is a registered trademark of JBL, Incorporated.
*Trademark of Dolby Laboratories.
DTS is a registered trademark of Digital Theater Systems, Inc.
Printed 11/99
Part No. 200731     
Specifications  
PSW-D112
Amplifier Power (RMS)
250 Watts
Driver
12" High-Polymer Laminate
Inputs
Line Level and Speaker Level
Outputs
Line Level and Speaker Level
Low-Pass Frequency
Continuously variable from 60Hz – 180Hz
High-Pass Frequency
Continuously variable from 60Hz – 180Hz
when using line-level outputs;
180Hz when using speaker-level outputs
Frequency Response
28Hz – low-pass crossover setting
Dimensions
17-1/2 x 17-1/2 x 19-1/8"
445 x 445 x 486mm
Weight
40 lbs/18.2 kg
PSW-D112  11/9/99  11:02 AM  Page 8
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JBL PSW-D112 (serv.man2) User Manual / Operation Manual ▷ Download