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OPERATION
Power
Move the Master Power switch
If you will be away from home
¢ to the "On" position to use
for an extended period of time,
the L8400P subwoofer.
or if the subwoofer will not be
Level Control
The subwoofer Level Control
adjustment depends on sev-
• adjusts the volume of the
eral variables such as room
subwoofer relative to the rest
size, subwoofer placement,
of the system. Proper level
type of main speakers and
Crossover Adjustments
The Crossover Frequency
Control ¶ determines 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 and
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 fre-
quencies, set the low-pass
crossover control to a higher
setting, between 120Hz and
150Hz. This control is not used
when the LFE switch ∞ is in
the "LFE" position.
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used, switch the Master
Power switch ¢ to the "Off"
position.
position. Adjust the subwoofer
level so that the volume of the
bass information is pleasing
to you.
Phase Control
The Phase Control § deter-
Phase switch to maximize
bass output at the listening
mines whether the sub-
position.
woofer's pistonlike action
moves in and out in phase
Remember, every system,
with the main speakers or
room and listener is different.
opposite the main speakers.
There are no right or wrong
There is no correct or incor-
settings; this switch offers the
rect setting. Proper phase
added flexibility to adjust your
adjustment depends on sev-
subwoofer for optimum per-
eral variables such as sub-
formance for your specific
woofer placement and lis-
listening conditions without
tener position. Adjust the
TROUBLESHOOTING
If you used the high-level
If there is low (or no) bass
(speaker) inputs and there
output:
is no sound from any of the
• Make sure the connections
speakers:
to the left and right "Speaker
• Check that the receiver/
Inputs" have the correct
amplifier is on and a source
polarity (+ and –).
is playing.
• Make sure that the sub-
• Check that the powered
woofer is plugged into an
subwoofer is plugged into
active electrical outlet and
an active electrical outlet
switched on.
and is switched on.
• Adjust the crossover point.
• Check all wires and connec-
• Flip the Phase Control switch
tions between the receiver/
to the opposite position.
amplifier and the speakers.
• If you are using a Dolby
Make sure all wires are con-
Digital/DTS receiver or
nected. Make sure none of
processor, make sure that the
the speaker wires are frayed,
subwoofer and bass manage-
cut or punctured, or touching
ment adjustments on the
each other.
receiver/processor are set up
• Review proper operation
correctly.
of your receiver/amplifier.
• Slowly turn the Level Control
clockwise until you begin to
hear the desired amount of
bass.
having to move your speakers.
If at some time in the future
you happen to rearrange your
listening room and move your
speakers, you should experi-
ment with the Phase switch in
both positions, and leave it in
the position that maximizes
bass performance.
If you used the line-level
inputs and there is no sound
from the subwoofer:
• Check that the receiver/
amplifier is on and a source is
playing.
• Check that the powered
subwoofer is plugged into an
active electrical outlet and is
switched on.
• Check all wires and
connections between the
receiver/amplifier and the
subwoofer. Make sure all
wires are connected. Make
sure none of the wires are
frayed, cut or punctured, or
touching each other.
• 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.
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