McIntosh XLS112 - Manual (Page 12)

12
How to Operate
How to Operate
Level Control
Start with the LEVEL CONTROL in the center position
and perform the system level calibration on the A/V Con-
trol Center or Surround Decoder for
the subwoofer level. If the subwoofer
level can not be set, adjust the
XLS112’s LEVEL CONTROL to
provide adequate range during cali-
bration. Refer to figure 3.
Note: If the Control is set to maximun and additonal output is
needed refer to note 3.2 on page 10.
Low Pass
This control determines from what frequency and below
the XLS112 will reproduce sound when the imformation is
present in the audio signal.
When the XLS112 is used with
a discrete Sub Out from a Home
Theater Control Center, the
LOW PASS Control should be
set to OUT, as the signal should
contain only low frequency in-
formation. Refer to figure 4.
Phase
The PHASE Switch sets the acoustic output phase of the
XLS112 to either 0 or 180 degrees relative to its input. This
switch is to help avoid phase cancellation (characterized by
a loss of bass information) between the
XLS112 and any other low frequency
producing speaker in the system. Care-
ful listening with this circuit switched
to 0 and then listening with it switched
to 180 will help you determine if this effect will be benefi-
cial to the system. Set the switch for the desired bass out-
put. Refer to figure 5.
Power
When the POWER SWITCH is set to the OFF position, the
XLS112 can not be turned on by a
Remote Power Conrol input or au-
dio input signal sensing. Refer to
figure 6.
Remote Power Control
The XLS112’s Power Control Circuitry uses the turn-on
signal from a McIntosh Control Center or Preamplifier to
switch On and Off. When a Power Control Cable is con-
nected between the Control Center or Preamplifier and the
XLS112, the audio signal-sensing circuit is disabled and
the XLS112 will automatically turn-on when the Control
Center or Preamplifier is on. The XLS112 also has a Power
Control OUTput jack for triggering additional subwoofers
or other McIntosh component(s).
When there is no Power Control Cable connected to the
XLS112, the audio signal-sensing circuitry is active and
automatically switches power On and Off. This occurs
when a music signal is detected at the Line INput(s). A
time delay of thirty minutes is incorporated in the circuit to
prevent the XLS112 from turning off during a music or
movie passage where there is little low frequency activity.
Status Indicator
The STATUS Indicator is a tri-color LED and illuminates a dif-
ferent color depending upon the current operating condition of
the XLS112. When the LED is illuminated Red the XLS112 is in
the Standby Mode. The LED will change to Green in color when
the XLS112 is switched on ei-
ther by a Power Control Signal
or the Audio Signal Sensing Cir-
cuit has detected a low fre-
quency audio signal present at
the Input jack(s). During peaks in the audio signal the LED may
change from Green to Orange in color to indicate the built-in
Power Guard Circuit has momentarily activated. Refer to figure
7.
Figure 4
Figure 7
Figure 3
Figure 6
Figure 5