JBL ATX100S - Manual (Page 6)

6
OPERATION
With LFE Connection
If you are using the LFE input,
the subwoofer's CROSSOVER
control is NOT active, because
this function is controlled by
your surround processor.
When using the LFE input, set
the subwoofer's VOLUME con-
trol to "Max" and calibrate the
subwoofer level along with the
other speakers according to
the set-up instructions in the
owner's manual for your sur-
round receiver/amplifier.
Other Connections
If you are using any other con-
nection method, start with the
subwoofer VOLUME control in
the "9 o'clock" position and the
CROSSOVER in the 12 o'clock
position. To fine-tune the sub-
woofer's volume and crossover
frequency settings, listen to
familiar material with powerful
bass at a typical listening level.
Bass response should not over-
power the room, but instead
contribute to a harmonious
blend across the entire musical
range. Many users have a ten-
dency to set the subwoofer vol-
ume and crossover too high,
believing that a subwoofer is
there to produce lots of boom
and shake the room to make its
presence felt. This is not entire-
ly true. A subwoofer is there to
enhance bass, extending the
response of the entire system
so that bass can be felt as well
as heard.
However, overall balance must
be maintained; otherwise, the
music will not sound natural.
An experienced listener will set
the volume and crossover
of the subwoofer so that its
impact on bass response is
always there, but is never
obtrusive.
Phase Control
The proper adjustment of the
subwoofer's rear panel phase
switch for your system depends
on several variables such as
room size, subwoofer place-
ment and listener position.
Listen to a familiar selection
with powerful bass at a typical
listening level, while occasion-
ally changing the position of the
phase switch. The position
which provides maximum bass
output at your listening position
is the correct position.
Auto-On Signal Sensing
The ATX Subwoofer incor-
porates automatic signal-
sensing circuitry which turns
the subwoofer on instantly
when an audio signal is
present. When a signal has not
been detected for approxi-
mately 1.5 minutes, the sub-
woofer automatically goes into
standby mode.