Read JBL E 250P (serv.man9) User Guide / Operation Manual online
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 receiver/amplifier
is on and a source is playing.
is on and a source is playing.
• Check that 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 receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the speaker
wires are frayed, cut or
punctured.
tions between receiver/
amplifier 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.
of your receiver/amplifier.
If there is low (or no) bass
output:
output:
• Make sure the connections to
the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
• Make sure that the subwoofer
is plugged into an active elec-
trical outlet and switched on.
is plugged into an active elec-
trical 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 adjustments on
the receiver/processor are
set up correctly.
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.
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:
and there is no sound from the
subwoofer:
• Check that receiver/amplifier
is on and a source is playing.
is on and a source is playing.
• Check that powered sub-
woofer is plugged into an active
electrical outlet and is switched
on.
woofer is plugged into an active
electrical outlet and is switched
on.
• 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.
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.
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 con-
figured your receiver/processor
so that the subwoofer/LFE out-
put is on.
figured your receiver/processor
so that the subwoofer/LFE out-
put is on.
PHASE CONTROL
The Phase Control determines
whether the subwoofer’s pis-
ton-like action moves in and out
in phase with the main speak-
ers or opposite the main speak-
ers. 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 lis-
tening position.
whether the subwoofer’s pis-
ton-like action moves in and out
in phase with the main speak-
ers or opposite the main speak-
ers. 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 lis-
tening 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 perform-
ance 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 experiment with the
and listener is different. There
are no right or wrong settings;
this switch offers the added
flexibility to adjust your sub-
woofer for optimum perform-
ance 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 experiment with the
phase switch in both positions,
and leave it in the position that
maximizes bass performance.
and leave it in the position that
maximizes bass performance.
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