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loudspeakers out of phase will not
damage them, but will result in less
bass and poor imaging.
Center Channel Volume
To properly adjust your center
channel volume, please refer to the
owner's manual that came with your
AV Receiver for proper adjustment
procedures. Before you attempt to
adjust the volume, you need to select
the proper center channel mode on
your AV Receiver. Select the "Center
Normal" mode. Most amps have a
"test tone" or "noise sequencer"
feature to help you balance the center
channel with the rest of your system.
Using the controls on your AV
receiver/amp, adjust the center
channel level (volume) control so that
the sound from the center speaker is
the same level at your normal
listening position, as the sound from
the left and right front speakers.
POWER HANDLING
Thanks to its high efficiency, the
JBL G Center loudspeaker will
produce reasonable volume 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
generate 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
amplifier's power rating per channel
must not exceed the maximum
recommended amplifier power for that
specific loudspeaker model. Please
see the specification section for
details. Following these guidelines
will provide virtually distortion-free
sound reproduction and long
loudspeaker life.
G SERIES LOUDSPEAKERS
TROUBLESHOOTING
The vast majority of new speaker
"malfunctions" end up being traced to
connections or switch settings. Check
the following tips first, before
requesting service.
No sound at all or very faint sound
from the center channel speaker
1. Speaker wire has become
disconnected.
2. One of the connections between
sound source and AV receiver/amp is
faulty or has become disconnected.
3. AV receiver/amp center channel
mode not selected. Please select a
mode that activates the center
channel.
4. AV receiver/amp "audio direct"
switch is activated. This switch should
be off to activate the 5 speaker
surround mode.
5. Sound source (VDP, VCR, CD,
cassette deck, turntable) not turned
on, not activated, not hooked up or
not selected on AV receiver/amp front
panel.
Speaker plays at low volumes
but shuts off as volume is
increased OR sound turns on
and off intermittently
A few strands of speaker wire may
be shorting out. Recheck the con-
nections. Recheck the impedance
of the amp.
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 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 com-
mercial spot remover. Do not use any
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