Troubleshooting; Phase Control - JBL DPS-12 Simple Setup Manual

Phase Control

Phase
180
0
Remember, every system,
The Phase Control determines
room and listener is different.
whether the subwoofer
speaker's piston-like action There are no right or wrong
moves in and out with the settings; any setting you
choose will result in excellent
main speakers, 0° , or opposite
the main speakers, 180° . There performance. Should you
is no correct or incorrect set- decide to fine-tune your
system for optimum
ting. Proper phase adjustment
depends on several variables performance, be patient and
such as subwoofer placement trust your ears. It will be
worth the effort involved to
and listener position. Adjust
the phase switch to maximize fully "tweak" your system.
bass output at the listening
position.

Troubleshooting

If you used the high-level If there is low bass output,
(speaker) inputs and there is check the following:
no sound from any of the
• Make sure the connections
speakers, check the
to the left and right "Speaker
following:
Inputs" have the correct
• Receiver/amplifier is on polarity (+ and –).
and a source is playing. • Make sure that the sub-
• Powered subwoofer is woofer is plugged into an
plugged in. active electrical outlet.
• Check all wires and connec- • Powered subwoofer is
tions between receiver/ampli- plugged in.
fier and speakers. Make sure • Adjust the crossover point.
all wires are connected. Make • If you are using a Dolby
sure none of the speaker wires Digital/DTS receiver or
are frayed, cut or punctured. processor, make sure that the
• Review proper operation subwoofer adjustments on
of your receiver/amplifier. the receiver/processor are
set up correctly.
– 7 –
If you used the line-level
inputs and there is no sound
from the subwoofer, check
the following:
• Receiver/amplifier is on and
a source is playing.
• Powered subwoofer is
plugged in.
• Check all wires and con-
nections between receiver/
amplifier and subwoofer. Make
sure all wires are connected.
Make sure none of the wires
are frayed, cut or punctured.
• Review proper operation of
your receiver/amplifier.