Lexicon MC-1 - Manual (Page 35)

27
MC-1 Digital Controller
S ystem
Configuration
The MC-1 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 MC-1. 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.
ON, OFF
-5dB to +35dB
▲ ▼
Adjust with or
SUB PEAK LIMITER
LIMITER
LIMITER ADJUST ON
+15dB
!WARNING!
REDUCE SYSTEM VOLUME
BEFORE TURNING
LIMITER OFF
Subwoofer Peak Limiter
Dolby Digital (AC-3) and DTS encoded sources can produce low
frequency peaks that are much louder than those in matrixed Dolby
Surround decoding. These higher levels may be troublesome in the
home listening environment, 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 sepa-
rate 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 calibrated
system.
a Dolby Digital AC-3 signal is coming in, the MC-1 will load the DOLBY
DIGITAL effect with the factory preset settings. If a DTS signal is coming
in, the MC-1 will load the DTS FILM effect with the factory preset
settings.
Note that the Volume control is active
when utilizing external noise calibration.