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The Control Series Speakers
may be wall mounted. The
customer is responsible for
proper selection and use of
mounting hardware, avail-
able through hardware
stores, to properly and safely
wall mount the speakers.
This product is not intended
for ceiling mounting.
Optional adjustable wall/
ceiling-mount brackets are
available from JBL.
Contact your dealer or call
800-336-4JBL for a dealer
near you.
three. Wall Mounting
CM40AW, CM42, CM42AW, CM52, CM52AW
Horizontal
Vertical
Troubleshooting
If there is no sound from
any of the speakers, check
the following:
• Receiver/amplifier is on and
a source is playing.
• Review proper operation of
your receiver/amplifier.
If there is no sound coming
from one speaker, check the
following:
• Check the “Balance” control
on your receiver/amplifier.
• Check all wires and connec-
tions between receiver/
amplifier and speakers.
• Make sure all wires are
connected. Make sure none of
the speaker wires are frayed,
cut, or punctured.
If the system plays at low
volumes but shuts off as
volume is increased, check
the following:
• Check all wires and connec-
tions between receiver/
amplifier and speakers.
• Make sure all wires are con-
nected. Make sure none of the
speaker wires are frayed, cut,
or punctured.
• If more than one pair of
main speakers is being used,
check the minimum imped-
ance requirements of your
receiver/amplifier.
If there is low bass output,
check the following:
• Make sure the polarity
(+ and –) of the left and
right “Speaker Inputs” are
connected properly.
Control Series OM 1/21/99 3:48 PM Page 5