Lexicon DC-2 - Manual (Page 35)

27
DC-2 Digital Controller
System
Configuration
Subwoofer Peak Limiter
The DC-2 provides a Subwoofer Peak Limiter that prevents the subwoofer
signal level from exceeding a preset value. The limit is factory preset to a
level of +15dB. This setting can be changed within the limiter’s operating
range of -5dB to +35dB, with -5dB providing maximum limiting.
To turn off the limiter or to change its setting, select the SUB PK LIMITER
parameter in the Output Levels menu.
If you want to turn the limiter off, first turn the system volume down in order
to prevent the subwoofer from overloading.
Press ▼ to select LIMITER, then press SELECT. Press ▼ to select OFF. Press
DONE twice to return to the Output Levels menu. While readjusting the
system volume back to a comfortable listening level, check to be sure the
subwoofer or its amplifier is not overloading on passages with loud low
frequency peaks.
Selecting LIMITER ADJUST in the Sub Peak Limiter menu invokes a
calibration routine for setting the optimal peak level for your installation.
Pressing SELECT routes low frequency calibration noise to the subwoofer
output of the DC-2. A two-line display indicates the LIMITER LEVEL
setting in dB on the top line with a bar at the bottom to indicate relative noise
level. Press ▲ and ▼ to adjust the noise level to the highest level that your
equipment can reproduce without overload.
Be sure the limiter is set to ON before exiting. Press DONE to exit and
automatically set the limiter to the level you have selected.
ON, OFF
-5dB to +35dB
▲ ▼ Adjust with or
SUB PEAK LIMITER
LIMITER
LIMITER ADJUST ON
+15dB
!WARNING!
REDUCE SYSTEM VOLUME
BEFORE TURNING
LIMITER OFF
Dolby Digital (AC-3) and DTS encoded sources can produce low frequency
peaks that are much louder than those in matrixed Dolby Surround decod-
ing. These higher levels may be troublesome in the home listening environ-
ment, either because they disturb non-listeners in nearby rooms, or because
of the inability of the subwoofer and its associated amplifier to reproduce
these levels without clipping.
Note that the Sub Peak Limiter is
separate from the Subwoofer level
control in the Effect Adjust menus —
one setting does not affect the other.
Note that +00dB=85dB, and
+15dB=100dB in a properly cali-
brated system.
effect with the factory preset settings. If a DTS signal is coming in, the
DC-2 will load the DTS FILM effect with the factory preset settings.
Note that the Volume control is ac-
tive when utilizing external noise.