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TROUBLESHOOTING
The vast majority of new speaker
“malfunctions” end up being traced to
connections or switch settings. Check
the following tips first, before request-
ing service.
No sound at all or very faint sound
from both speakers
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.
Both speakers play at low
volume 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 impedance requirements
of 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 experi-
encing problems, consult your JBL
dealer.
GENERAL CARE
The grille is held in place by pins near
the edges (except G40, which has a
non-removable grille). To remove the
grille, grasp it by both top and bottom
edges and pull gently. To replace
grille, reposition 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.
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, call
800-336-4JBL for your nearest
warranty station. Do not return
products to the JBL factory without
prior authorization.
3
Specifications G40 G100 G200
High Frequency Transducer 2" fiber cone 14 mm 1"
Low Frequency Transducer 5" 5" 6-1/2"
Crossover Frequency 2.2 kHz 3 kHz 3 kHz
Frequency Response (–6 dB) 75 Hz – 20 kHz 70 Hz – 20 kHz 55 Hz – 20 kHz
Sensitivity (1 Watt /1 Meter) 86 dB 87 dB 88 dB
Nominal Impedance 8 Ohms 6 Ohms 6 Ohms
Power Handling Range 10 – 50 Watts 10 – 50 Watts 10 – 60 Watts
External Dimensions
(H X W X D) 11 x 6-1/2 x 7-1/4" 12-3/16 x 7-1/8 x 8-3/4" 15 x 9-1/4 x 8-13/16"
280 x 165 x 184 mm 310 x 181 x 222 mm 381 x 235 x 224 mm
Weight (each) 7 lbs / 3.2 kg 8 lbs / 3.6 kg 12.1 lbs / 5.5 kg
G SERIES LOUDSPEAKERS
G Series Manual.qXp 7/27/98 12:54 PM Page 5