HT 5 (serv.man4) - JBL Audio User Guide / Operation Manual. Page 3

If there is no sound from 
any of the speakers:
• Check that receiver/
amplifier is on and that 
a source is playing.
• Review proper operation 
of your receiver/amplifier.
• Check all wires and con-
nections between receiver/
amplifier and speakers.
• Make sure all wires are
connected. Make sure none 
of the speaker wires are
frayed, cut or punctured.

If there is no sound coming
from one speaker:
• Check the “Balance”
control on your receiver/
amplifier.
• Check all wires and
connections between
receiver/amplifier and
speakers. Make sure all
wires are connected. Make
sure none of the speaker
wires are frayed, cut or
punctured.

• In Dolby* Digital or DTS

®

modes, make sure that the
receiver/processor is
configured so that the
speaker in question is
enabled.

If the system plays at low
volumes but shuts off as
volume is increased:
• Check all wires and
connections between
receiver/amplifier and
speakers. Make sure all
wires are connected. 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
impedance requirements of
your receiver/amplifier.

If there is low (or no) bass
output:
• Make sure the connections
to the left and right “Speaker

Inputs” have the correct 
polarity (+ and –).
• If a powered subwoofer is
being used, check the
manufacturer’s instructions
for proper use. 
• If a subwoofer is being
used in Dolby Digital or DTS
mode, make sure your
receiver/processor is
configured so that the
subwoofer and LFE output
are enabled.

If there is no sound from 
the surround speakers:
• Check all wires and con-
nections between receiver/
amplifier and speakers.
Make sure all wires are
connected. Make sure none
of the speaker wires are
frayed, cut or punctured.
• Review proper operation of
your receiver/amplifier and
its surround-sound features.
• Make sure the movie or TV
show you are watching is

CONNECTION TIPS

Speakers and electronics
terminals have corre-
sponding (+) and (–)
terminals. It is important to
connect both speakers
identically: (+) on the

speaker to (+) on the
amplifier and (–) on the
speaker to (–) on the
amplifier. Wiring “out of
phase” results in thin sound,
weak bass and a poor 
stereo image.

With multichannel surround-
sound systems, connecting 
all of the speakers in your
system with the correct
polarity is important in order
to preserve the proper

ambience and directionality
of the program material.

–     +

–    +

–       +

LEFT

RIGHT

–       +