JBL G Series Owner's Manual - Troubleshooting

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