JBL ATX 30 (serv.man10) User Manual / Operation Manual ▷ View online
6
OPERATION
With LFE Connection
If you are using the LFE input,
the subwoofer's CROSSOVER
control is NOT active, because
this function is controlled by
your surround processor.
When using the LFE input, set
the subwoofer's VOLUME con-
trol to "Max" and calibrate the
subwoofer level along with the
other speakers according to
the set-up instructions in the
owner's manual for your sur-
round receiver/amplifier.
the subwoofer's CROSSOVER
control is NOT active, because
this function is controlled by
your surround processor.
When using the LFE input, set
the subwoofer's VOLUME con-
trol to "Max" and calibrate the
subwoofer level along with the
other speakers according to
the set-up instructions in the
owner's manual for your sur-
round receiver/amplifier.
Other Connections
If you are using any other con-
nection method, start with the
subwoofer VOLUME control in
the "9 o'clock" position and the
CROSSOVER in the 12 o'clock
position. To fine-tune the sub-
woofer's volume and crossover
frequency settings, listen to
familiar material with powerful
bass at a typical listening level.
Bass response should not over-
power the room, but instead
contribute to a harmonious
blend across the entire musical
range. Many users have a ten-
dency to set the subwoofer vol-
ume and crossover too high,
believing that a subwoofer is
there to produce lots of boom
and shake the room to make its
presence felt. This is not entire-
ly true. A subwoofer is there to
enhance bass, extending the
response of the entire system
so that bass can be felt as well
as heard.
However, overall balance must
be maintained; otherwise, the
music will not sound natural.
An experienced listener will set
the volume and crossover
of the subwoofer so that its
impact on bass response is
always there, but is never
obtrusive.
nection method, start with the
subwoofer VOLUME control in
the "9 o'clock" position and the
CROSSOVER in the 12 o'clock
position. To fine-tune the sub-
woofer's volume and crossover
frequency settings, listen to
familiar material with powerful
bass at a typical listening level.
Bass response should not over-
power the room, but instead
contribute to a harmonious
blend across the entire musical
range. Many users have a ten-
dency to set the subwoofer vol-
ume and crossover too high,
believing that a subwoofer is
there to produce lots of boom
and shake the room to make its
presence felt. This is not entire-
ly true. A subwoofer is there to
enhance bass, extending the
response of the entire system
so that bass can be felt as well
as heard.
However, overall balance must
be maintained; otherwise, the
music will not sound natural.
An experienced listener will set
the volume and crossover
of the subwoofer so that its
impact on bass response is
always there, but is never
obtrusive.
Phase Control
The proper adjustment of the
subwoofer's rear panel phase
switch for your system depends
on several variables such as
room size, subwoofer place-
ment and listener position.
Listen to a familiar selection
with powerful bass at a typical
listening level, while occasion-
ally changing the position of the
phase switch. The position
which provides maximum bass
output at your listening position
is the correct position.
subwoofer's rear panel phase
switch for your system depends
on several variables such as
room size, subwoofer place-
ment and listener position.
Listen to a familiar selection
with powerful bass at a typical
listening level, while occasion-
ally changing the position of the
phase switch. The position
which provides maximum bass
output at your listening position
is the correct position.
Auto-On Signal Sensing
The ATX Subwoofer incor-
porates automatic signal-
sensing circuitry which turns
the subwoofer on instantly
when an audio signal is
present. When a signal has not
been detected for approxi-
mately 1.5 minutes, the sub-
woofer automatically goes into
standby mode.
porates automatic signal-
sensing circuitry which turns
the subwoofer on instantly
when an audio signal is
present. When a signal has not
been detected for approxi-
mately 1.5 minutes, the sub-
woofer automatically goes into
standby mode.
7
SPEAKER CONNECTIONS
Separate and strip the ends of
the speaker wire as shown.
Speakers and amplifiers/
receivers have corresponding
(+) and (–) terminals. The (+)
lead of the speaker wire is
noted with a stripe. It is impor-
tant to connect all the speakers
identically: (+) on the speaker
to (+) on the amplifier and (–) on
the speaker to (–) on the ampli-
fier. Wiring “out of phase”
results in thin sound, weak
bass and a poor stereo image.
Use Speaker-level connection
only if your surround receiver
does not have line-level sub-
woofer or LFE outputs. If a line-
level connection is available,
go to the next page.
For speaker-level connection,
connect loudspeaker cable
from the front left and right
loudspeaker outputs of your
the speaker wire as shown.
Speakers and amplifiers/
receivers have corresponding
(+) and (–) terminals. The (+)
lead of the speaker wire is
noted with a stripe. It is impor-
tant to connect all the speakers
identically: (+) on the speaker
to (+) on the amplifier and (–) on
the speaker to (–) on the ampli-
fier. Wiring “out of phase”
results in thin sound, weak
bass and a poor stereo image.
Use Speaker-level connection
only if your surround receiver
does not have line-level sub-
woofer or LFE outputs. If a line-
level connection is available,
go to the next page.
For speaker-level connection,
connect loudspeaker cable
from the front left and right
loudspeaker outputs of your
Connection Tips
Speaker Level
amplifier/receiver to the corre-
sponding left and right IN termi-
nals on the subwoofer.
Then, connect loudspeaker
cable from left and right loud-
speaker OUT on the subwoofer
to the corresponding input ter-
minals on the front left and right
loudspeakers.
sponding left and right IN termi-
nals on the subwoofer.
Then, connect loudspeaker
cable from left and right loud-
speaker OUT on the subwoofer
to the corresponding input ter-
minals on the front left and right
loudspeakers.
Connect the remaining loud-
speakers directly to the receiv-
er. In the surround processor
set-up menu, the Left/Right
front speakers must be
selected as "Large". All other
loudspeakers must be selected
as small.
speakers directly to the receiv-
er. In the surround processor
set-up menu, the Left/Right
front speakers must be
selected as "Large". All other
loudspeakers must be selected
as small.
8
LINE LEVEL
If your receiver has a pair of
stereo subwoofer outputs, con-
nect interconnect cable from
the receiver's left and right
subwoofer outputs to the corre-
sponding inputs marked LINE
LEVEL IN L and R on the
subwoofer.
stereo subwoofer outputs, con-
nect interconnect cable from
the receiver's left and right
subwoofer outputs to the corre-
sponding inputs marked LINE
LEVEL IN L and R on the
subwoofer.
If your receiver has a single
subwoofer output or a dedi-
cated LFE output, connect
interconnect cable from this
output to the LFE input on the
subwoofer.
subwoofer output or a dedi-
cated LFE output, connect
interconnect cable from this
output to the LFE input on the
subwoofer.
9
Subwoofer
Crossover
Subwoofer
Level
Volume
Subwoofer playback level can
be adjusted using the rear panel
Volume control. For detailed
be adjusted using the rear panel
Volume control. For detailed
information on fine-tuning
Volume and Crossover
Frequency, see page 6.
Volume and Crossover
Frequency, see page 6.
Crossover Frequency
The crossover frequency knob
determines the highest
frequency your subwoofer will
reproduce. It allows a seamless
transition from the subwoofer
to the satellite speakers.
determines the highest
frequency your subwoofer will
reproduce. It allows a seamless
transition from the subwoofer
to the satellite speakers.
Experiment with this adjustment
to find the crossover frequency
that sounds best in your room.
For subwoofers used with
Surround Sound processors
with dedicated subwoofer out-
to find the crossover frequency
that sounds best in your room.
For subwoofers used with
Surround Sound processors
with dedicated subwoofer out-
puts, the best result will be
obtained with the control at the
”150 Hz“ position.
obtained with the control at the
”150 Hz“ position.
If there is no sound from any of the
speakers:
• Check that receiver/amplifier is on
speakers:
• Check that receiver/amplifier is on
and a source is playing.
• Check that the powered subwoofer is
plugged in, its Power switch is
switched to the “ON” position.
switched to the “ON” position.
• Check all wires and connections
between receiver/amplifier and
speakers. Make sure all wires are
connected. Make sure none of the
speaker wires are frayed, cut or
punctured.
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 no sound coming from one
speaker:
• Check the “Balance” control on your
speaker:
• Check the “Balance” control on your
receiver/amplifier.
• Check all wires and connections
between receiver/amplifier and
speakers. Make sure all wires are
connected. Make sure none of the
speaker wires are frayed, cut or
punctured.
speakers. Make sure all wires are
connected. Make sure none of the
speaker wires are frayed, cut or
punctured.
• In Dolby Digital or DTS
®
modes, make
sure that the receiver/processor is
configured so that the speaker in
question is enabled.
configured so that the speaker in
question is enabled.
If there is no sound from the center
speaker:
• Check all wires and connections
speaker:
• Check all wires and connections
between receiver/amplifier and
speaker. Make sure all wires are con-
nected. Make sure none of the
speaker wires are frayed, cut or
punctured.
speaker. Make sure all wires are con-
nected. Make sure none of the
speaker wires are frayed, cut or
punctured.
• If your receiver/processor is set in
Dolby Pro Logic mode, make sure the
center speaker is not in phantom
mode.
• If your receiver/processor is set in
mode.
• If your receiver/processor is set in
Dolby Digital or DTS
®
mode, make
sure the receiver/processor is con-
figured so that the center speaker is
enabled.
figured so that the center speaker is
enabled.
If the system plays at low volumes but
shuts off as volume is increased:
• Check all wires and connections
shuts off as volume is increased:
• Check all wires and connections
between receiver/amplifier and
speakers. Make sure all wires are
connected. Make sure none of the
speaker wires are frayed, cut or
punctured.
speakers. Make sure all wires are
connected. Make sure none of the
speaker wires are frayed, cut or
punctured.
• If more than one pair of main speak-
ers is being used, check the minimum
impedance requirements of your
receiver/amplifier.
impedance requirements of your
receiver/amplifier.
If there is low (or no) bass output:
• Make sure the connections to the left
• Make sure the connections to the left
and right “Speaker Inputs” have the
correct polarity (+ and –).
correct polarity (+ and –).
• Make sure the subwoofer is plugged
into an active electrical outlet.
• Make sure the powered subwoofer is
plugged in and switched on.
• In Dolby Digital or DTS
®
modes, make
sure your receiver/processor is con-
figured so that the subwoofer and LFE
output are enabled.
figured so that the subwoofer and LFE
output are enabled.
If there is no sound from the surround
speakers:
• Check all wires and connections
speakers:
• Check all wires and connections
between receiver/amplifier and
speakers. Make sure all wires are
connected. Make sure none of the
speaker wires are frayed, cut or
punctured.
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 and its surround-
sound features.
sound features.
• Make sure the movie or TV show you
are watching is recorded in a sur-
round-sound mode. If it is not, check
to see if your receiver/amplifier has
other surround modes you may use.
round-sound mode. If it is not, check
to see if your receiver/amplifier has
other surround modes you may use.
• In Dolby Digital or DTS
®
modes, make
sure your receiver/processor is con-
figured so that the surround speakers
are enabled.
figured so that the surround speakers
are enabled.
• Review the operation of your DVD
player and the jacket of your DVD to
make sure that the DVD features the
desired Dolby Digital or DTS
make sure that the DVD features the
desired Dolby Digital or DTS
®
mode,
and that you have properly selected
that mode using both the DVD play-
er’s menu and the DVD disc’s menu.
that mode using both the DVD play-
er’s menu and the DVD disc’s menu.
TROUBLESHOOTING
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