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Operation
Power
When the unit is plugged in
and no signal is received
for approximately 10 –15
minutes, the subwoofer will
go into a standby mode until
a signal is present. Due to
JBL’s unique,
high-efficiency
digital-amplifier design,
power consumption is minimal
when the subwoofer is not
receiving a signal.
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
Phase
60
180
0
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
3 on page 4, 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 con-
trol to a lower frequency
setting, between 50Hz –
100Hz. This will concen-
trate the subwoofer’s
efforts to the ultradeep
bass sounds, while your
main speakers continue to
reproduce the mid-bass
information. If you are
using smaller bookshelf
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
pleasing to you.
Crossover Adjustments
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 sub-
woofer as shown in Hookup
2 on page 4, there is no
high-pass control. Unless
your receiver/amplifier
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.
PSW-D110 OM 7/17/98 11:51 AM Page 6