JBL LXE 990 (serv.man2) User Manual / Operation Manual ▷ View online
must consult the amplifier/receiver
manufacturer for clarification.
manufacturer for clarification.
TROUBLESHOOTING
The vast majority of new speaker
“malfunctions” end up being traced
to connections or switch settings.
To avoid packing up correctly
functioning speakers and sending
them off, only to find that they’re
not really at fault, check the
following tips first, before
requesting service.
The vast majority of new speaker
“malfunctions” end up being traced
to connections or switch settings.
To avoid packing up correctly
functioning speakers and sending
them off, only to find that they’re
not really at fault, check the
following tips first, before
requesting service.
No sound at all or very faint sound
from either speaker
1. Amp/receiver tape monitor
button pushed in while using CD,
FM or phono inputs.
2. Wrong speaker switch, “A” or
“B” speaker output.
3. Sound source (CD, cassette
deck, turntable) not turned on, not
activated, not hooked up or not
selected on amp/receiver front
panel.
from either speaker
1. Amp/receiver tape monitor
button pushed in while using CD,
FM or phono inputs.
2. Wrong speaker switch, “A” or
“B” speaker output.
3. Sound source (CD, cassette
deck, turntable) not turned on, not
activated, not hooked up or not
selected on amp/receiver front
panel.
No sound from one speaker
1. Balance control turned all the
way left or right.
2. Speaker wire has become
disconnected.
3. One of the connections
between sound source and
amp/receiver is faulty or has
become disconnected.
1. Balance control turned all the
way left or right.
2. Speaker wire has become
disconnected.
3. One of the connections
between sound source and
amp/receiver is faulty or has
become disconnected.
Both speakers play at low volumes
but shut off as volume is increased
OR sound turns on and off
intermittently
A few strands of speaker wire may
be shorting out. Recheck the
connections. Recheck the
but shut off as volume is increased
OR sound turns on and off
intermittently
A few strands of speaker wire may
be shorting out. Recheck the
connections. Recheck the
Hooking Up Multiple Sets of
Speakers
If your receiver has two complete
sets of speaker terminals (“A” and
“B”), it's possible to hook up an
additional pair of speakers for
simultaneous sound in another
room. However, some speakers
may not be usable as a second
pair if you want to play two
sets at once. Before hooking up
another set of speakers besides
your LXE Series, check the
following:
Speakers
If your receiver has two complete
sets of speaker terminals (“A” and
“B”), it's possible to hook up an
additional pair of speakers for
simultaneous sound in another
room. However, some speakers
may not be usable as a second
pair if you want to play two
sets at once. Before hooking up
another set of speakers besides
your LXE Series, check the
following:
1. Your amplifier or receiver
minimum load impedance.
Impedance is always expressed
in ohms and can be found in the
owner’s manual that came with
your unit. For example, the
following are typical entries in
amplifier/receiver owner’s
manuals:
A) 100 watts RMS into 8 ohms,
both channels driven, 20-20kHz
with less than 0.02% THD.
B) 160 watts RMS into 4 ohms,
both channels driven, 20-20kHz
with less than 0.02% THD.
2. The nominal impedance of
the second set of speakers.
A pair of LXE speakers when
conbined with another pair of
8 ohm speakers will present an
impedance to the amplifier/receiver
that is approximately 4 ohms. This
speaker combination can be used
with the amplifier/receiver cited in
B above. If the amplifier/receiver
has a specification similar to that
shown in A above, or if your
second set of speakers has an
impedance other than 8 ohms, you
minimum load impedance.
Impedance is always expressed
in ohms and can be found in the
owner’s manual that came with
your unit. For example, the
following are typical entries in
amplifier/receiver owner’s
manuals:
A) 100 watts RMS into 8 ohms,
both channels driven, 20-20kHz
with less than 0.02% THD.
B) 160 watts RMS into 4 ohms,
both channels driven, 20-20kHz
with less than 0.02% THD.
2. The nominal impedance of
the second set of speakers.
A pair of LXE speakers when
conbined with another pair of
8 ohm speakers will present an
impedance to the amplifier/receiver
that is approximately 4 ohms. This
speaker combination can be used
with the amplifier/receiver cited in
B above. If the amplifier/receiver
has a specification similar to that
shown in A above, or if your
second set of speakers has an
impedance other than 8 ohms, you
5
LXE owners manual 7/27/98 4:34 PM Page 4
minimum speaker impedance
required by the amp.
required by the amp.
Bass is very weak AND/OR sound
seems to come from each speaker
separately, without creating a
stable stereo image between the
speakers.
1. The polarity (+ & –) of one
speaker has been reversed
relative to the other. Double
check connections.
2. Speakers are too far away from
back and side walls or too far
apart. Experiment again with the
speaker placement. If you are still
encountering problems, consult
your JBL dealer.
seems to come from each speaker
separately, without creating a
stable stereo image between the
speakers.
1. The polarity (+ & –) of one
speaker has been reversed
relative to the other. Double
check connections.
2. Speakers are too far away from
back and side walls or too far
apart. Experiment again with the
speaker placement. If you are still
encountering problems, consult
your JBL dealer.
GENERAL CARE
The grille is held in place by pins
near the edges. To remove the
grille, grasp it by both top and
bottom edges and pull gently.
To replace grille, re-position it
carefully and press gently at the
corners. Do not push on the center
area of the grille.
The grille is held in place by pins
near the edges. To remove the
grille, grasp it by both top and
bottom edges and pull gently.
To replace grille, re-position it
carefully and press gently at the
corners. Do not push on the center
area of the grille.
The loudspeaker cabinet may be
cleaned with a slightly damp cloth.
To remove dust from the grille
cloth, use a vacuum with a brush
attachment. Spots may be
removed with a commercial spot
remover. Do not use any cleaners
or solvents on the speaker drivers
themselves.
cleaned with a slightly damp cloth.
To remove dust from the grille
cloth, use a vacuum with a brush
attachment. Spots may be
removed with a commercial spot
remover. Do not use any cleaners
or solvents on the speaker drivers
themselves.
6
SERVICE
Should your loudspeaker ever
need service, return it to the
JBL dealer from whom it was
purchased. If for some reason this
is impractical, in the United States,
call 800-336-4JBL for your nearest
warranty station. Military
personnel who purchased from
authorized military outlets should
return them to a similar outlet or
contact:
Should your loudspeaker ever
need service, return it to the
JBL dealer from whom it was
purchased. If for some reason this
is impractical, in the United States,
call 800-336-4JBL for your nearest
warranty station. Military
personnel who purchased from
authorized military outlets should
return them to a similar outlet or
contact:
Mohawk Marketing Corp.
149 Business Park Drive
P.O. Box 62229
Virginia Beach, VA 23462
Phone: 804-499-8901
Fax: 804-497-6690
149 Business Park Drive
P.O. Box 62229
Virginia Beach, VA 23462
Phone: 804-499-8901
Fax: 804-497-6690
If purchased outside the United
States, contact your local
distributor to make arrangements
for repair service. Do not return
products to the JBL factory.
States, contact your local
distributor to make arrangements
for repair service. Do not return
products to the JBL factory.
LXE owners manual 7/27/98 4:34 PM Page 5
7
Specifications
LXE330
LXE550
LXE770
LXE990
High Frequency
1" Pure
1" Pure
1" Pure
1" Pure
Dome Transducer
Titanium
Titanium
Titanium
Titanium
Midrange Transducer
n/a
n/a
5"
5"
(High Polymer Laminate Cone)
Low Frequency Transducer
6
1
/
2
"
8" 8" 10"
(High Polymer Laminate Cone)
Crossover Frequency
3.7 kHz
2.3 kHz
760/3.7 kHz 800/3.2 kHz
Frequency
55 Hz to
41 Hz to
41 Hz to
40 Hz to
Response (– 6 dB)
23 kHz
23 kHz
23 kHz
23 kHz
Sensitivity (1 Watt/1 meter)
90 dB
91 dB
91 dB
92 dB
Nominal Impedance
8 ohms
8 ohms
8 ohms
8 ohms
Recommended
10 to 125
10 to 140
10 to 150
10 to 200
Amplifier Power*
Watts
Watts
Watts
Watts
External Dimensions
Height 17
Height 17
3
/
8
"
23
1
/
8
"
26"
28
1
/
2
"
Width
9
5
/
8
"
12
1
/
8
"
12
1
/
8
"
13
1
/
2
"
Depth
6
3
/
4
"
8
15
/
16
"
8
15
/
16
"
8
15
/
16
"
External Dimensions
Height
Height
441 mm
587 mm
660 mm
724 mm
Width
245 mm
308 mm
308 mm
343 mm
Depth
172 mm
227 mm
227 mm
227 mm
Weight (each)
15 lbs
24 lbs
29 lbs
33 lbs
6.8 kg
10.9 kg
13.2 kg
15.0 kg
Shipping Weight
34 lbs
52 lbs
33 lbs
37 lbs
15.4 kg
23.6 kg
15.0 kg
16.8 kg
*The maximum recommended amplifier power rating will ensure proper system headroom to allow for
occasional program peaks. We do not recommend sustained operation at these maximum power Levels.
JBL continually strives to improve its products. New materials, production methods and design refinements
are introduced into existing models without notice as a routine expression of our design philosophy. For this
reason, JBL LXE Series Loudspeakers may differ in some respect from their published specifications
and descriptions, but will always equal or exceed the original specifications unless otherwise stated.
are introduced into existing models without notice as a routine expression of our design philosophy. For this
reason, JBL LXE Series Loudspeakers may differ in some respect from their published specifications
and descriptions, but will always equal or exceed the original specifications unless otherwise stated.
LXE owners manual 7/27/98 4:34 PM Page 6
L
S
80 Crossways Park West, Woodbury, NY 11797
Part No. 308338-001
LXE owners manual 7/27/98 4:34 PM Page 7
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