GHE 1000V (serv.man2) - JBL Audio User Guide / Operation Manual. Page 6

Thanks to their high efficiency, JBL GHE
loudspeakers will produce reasonable vol-
ume levels in a room of moderate size
with very little amplifier power. However,
using a small amplifier to obtain the
desired volume listening levels may lead
to overdriving the amplifier. This will gen-
erate high distortion levels and may cause
damage to your loudspeaker. For the best
performance, an amplifier should be
selected with an output rating that is
greater than the maximum power that will
be used. This margin of reserve power will
ensure that the amplifier will not attempt to
deliver more power than its design allows.
However, the power amplifier's power rat-
ing per channel must not exceed the max-
imum recommended amplifier power for
that specific loudspeaker model. Please
see the specifications section for details.
Following these guidelines will provide dis-
tortion free-sound reproduction and long
loudspeaker life.

The vast majority of new speaker "mal-
functions" end up being traced to connec-
tions 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
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.
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 impedance 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 encountering problems, consult
your JBL dealer.

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, reposition it care-
fully 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.

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. If
purchased outside the United States, 
contact your local distributor to make
arrangements for repair service. Do not
return products to the JBL factory.

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GHE Series Owners Manual  7/28/98 11:32 AM  Page 6