JBL L8400P (serv.man11) User Manual / Operation Manual ▷ View online
5
English
DOLBY PRO LOGIC (NON-DIGITAL) – SPEAKER LEVEL
Use this installation method
for Dolby Pro Logic applica-
tions (not Dolby Digital, DTS
or other digital processing),
where the receiver/processor
does not have a subwoofer
output, or a volume-controlled
preamp (line-) level output:
for Dolby Pro Logic applica-
tions (not Dolby Digital, DTS
or other digital processing),
where the receiver/processor
does not have a subwoofer
output, or a volume-controlled
preamp (line-) level output:
Connect your receiver or
amplifier’s front left and right
speaker terminals to the left
and right terminals on the
subwoofer that are marked
“Speaker Level In.” Connect
the left and right terminals
on the subwoofer that are
marked “Speaker Level Out” to
the corresponding terminals on
the back of your front left and
right speakers.
amplifier’s front left and right
speaker terminals to the left
and right terminals on the
subwoofer that are marked
“Speaker Level In.” Connect
the left and right terminals
on the subwoofer that are
marked “Speaker Level Out” to
the corresponding terminals on
the back of your front left and
right speakers.
Connect your receiver or
amplifier’s center, surround
and surround back speaker
terminals to the corresponding
terminals on the back of your
center and surround speakers.
amplifier’s center, surround
and surround back speaker
terminals to the corresponding
terminals on the back of your
center and surround speakers.
OPERATION
Move the Master Power switch
to the “On” position to use
the L8400P/230 subwoofer.
to the “On” position to use
the L8400P/230 subwoofer.
If you will be away from home
for an extended period of time,
or if the subwoofer will not be
for an extended period of time,
or if the subwoofer will not be
used, switch the Master Power
switch
switch
to the “Off” position.
The subwoofer Level Control
adjusts the volume of the
subwoofer relative to the rest
of the system. Proper level
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 position.
variables such as room size,
subwoofer placement, type of
main speakers and position.
Adjust the subwoofer level so
that the volume of the bass
information is pleasing
to you.
that the volume of the bass
information is pleasing
to you.
Crossover Adjustments
The Crossover Frequency Con-
trol
trol
determines the highest
frequency at which the sub-
woofer reproduces sounds. If
your main speakers can com-
fortably 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
woofer reproduces sounds. If
your main speakers can com-
fortably 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.
Level Control
Power
6
English
TROUBLESHOOTING
If you used the high-level
(speaker) inputs and there
is no sound from any of the
speakers:
(speaker) inputs and there
is no sound from any of the
speakers:
• Check that the receiver/
amplifier is on and a source
is playing.
amplifier is on and a source
is playing.
• Check that the powered
subwoofer is plugged into
an active electrical outlet
and is switched on.
subwoofer is plugged into
an active electrical outlet
and is switched on.
• Check all wires and connec-
tions between the receiver/
amplifier and the speakers.
Make sure all wires are con-
nected. Make sure none of the
speaker wires are frayed, cut
or punctured, or touching each
other.
tions between the receiver/
amplifier and the speakers.
Make sure all wires are con-
nected. Make sure none of the
speaker wires are frayed, cut
or punctured, or touching each
other.
• Review proper operation
of your receiver/amplifier.
of your receiver/amplifier.
If there is low (or no) bass out-
put:
put:
• Make sure the connections
to the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
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 and
switched on.
woofer is plugged into an
active electrical outlet and
switched on.
• Adjust the crossover point.
• Flip the Phase Control switch
to the opposite position.
to the opposite position.
• If you are using a Dolby
Digital/DTS receiver or
processor, make sure that the
subwoofer and bass manage-
ment adjustments on the
receiver/processor are set up
correctly.
Digital/DTS receiver or
processor, make sure that the
subwoofer and bass manage-
ment 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.
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:
inputs and there is no sound
from the subwoofer:
• Check that the receiver/
amplifier is on and a source is
playing.
amplifier is on and a source is
playing.
• Check that the powered
subwoofer is plugged into an
active electrical outlet and is
switched on.
subwoofer is plugged into an
active electrical outlet and is
switched on.
• Check all wires and
connections between the
receiver/amplifier and the sub-
woofer. Make sure all wires
are connected. Make sure
none of the wires are frayed,
cut or punctured, or touching
each other.
connections between the
receiver/amplifier and the sub-
woofer. 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.
your receiver/amplifier.
• Slowly turn the Level
Control clockwise until you
begin to hear the desired
amount of bass.
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.
configured your receiver/
processor so that the sub-
woofer/LFE output is on.
Phase Control
The Phase Control
deter-
mines whether the sub-
woofer’s pistonlike action
moves in and out in phase with
the main speakers or opposite
the main speakers. There is no
correct or incorrect setting.
Proper phase adjustment
depends on several variables
such as subwoofer placement
and listener position. Adjust
the Phase switch to maximize
woofer’s pistonlike action
moves in and out in phase with
the main speakers or opposite
the main speakers. There is no
correct or incorrect setting.
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.
position.
Remember, every system, room
and listener is different. There
are no right or wrong settings;
this switch offers the added
flexibility to adjust your sub-
woofer for optimum perfor-
mance for your specific
listening conditions without
having to move your speakers.
If at some time in the future
and listener is different. There
are no right or wrong settings;
this switch offers the added
flexibility to adjust your sub-
woofer for optimum perfor-
mance for your specific
listening conditions without
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.
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.
7
SPECIFICATIONS
JBL is a registered trademark of Harman International Industries, Incorporated.
Part No.361080-001
PRO SOUND COMES HOME
™
* Trademarks of Dolby Laboratories.
DTS is a registered trademark of Digital Theater Systems, Inc.
All features and specifications are subject to change without notice.
Model
L8400P/230
Description
300mm (12"), 600-Watt, high-performance compact powered subwoofer
Amplifier
Power (RMS)
Power (RMS)
600 Watts
Peak Dynamic
Power
Power
†
1200 Watts
Frequency
Response (–3dB)
Response (–3dB)
22Hz – Low-pass crossover frequency
Low-Pass
Crossover
Frequencies
Crossover
Frequencies
50Hz – 150Hz, Continuously adjustable; 150Hz when using speaker-level connection
Low-Frequency
Transducer
Transducer
12" PolyPlas™ cone with rubber surround and cast-aluminum chassis;
HeatScape™ motor structure; Symmetrical Field Geometry™ (SFG™); oversized
fiberglass voice coil; magnetic shorting ring
HeatScape™ motor structure; Symmetrical Field Geometry™ (SFG™); oversized
fiberglass voice coil; magnetic shorting ring
Baffle
Low diffraction, IsoPower™
Enclosure
Sealed
Inputs
Gold-plated 5-way binding-post speaker-level; left and right line-level,
switchable to LFE
switchable to LFE
Outputs
Gold-plated 5-way binding-post speaker-level
Dimensions
(H x W x D)
(H x W x D)
394mm x 394mm x 419mm (394mm without feet)
(15-1/2" x 15-1/2" x 16-1/2") (15-1/2" without feet)
(15-1/2" x 15-1/2" x 16-1/2") (15-1/2" without feet)
Weight
26.4kg (58 lb)
†
The Peak Dynamic Power is measured by recording
the highest peak-to-center voltage produced by the
power amplifier with its limiters disabled, across
the output of a resistive load equal to minimum
impedance of the transducer, using a 50Hz sine wave
burst, 3 cycles on, 17 cycles off.
the highest peak-to-center voltage produced by the
power amplifier with its limiters disabled, across
the output of a resistive load equal to minimum
impedance of the transducer, using a 50Hz sine wave
burst, 3 cycles on, 17 cycles off.
Declaration of Conformity
We, Harman Consumer Group International
2, route de Tours
72500 Chateau-du-Loir
France
72500 Chateau-du-Loir
France
declare in own responsibility that the product described
in this owner’s manual is in compliance
with technical standards:
in this owner’s manual is in compliance
with technical standards:
EN 55013:2001+A1:2003
EN 55020:2002+A1:2003
EN 61000-3-2:2000
EN 61000-3-3:1995+A1:2001
EN 60065:20
EN 55020:2002+A1:2003
EN 61000-3-2:2000
EN 61000-3-3:1995+A1:2001
EN 60065:20
Laurent Rault
Harman Consumer Group International
Chateau-du-Loir, France 4/05
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