SDP-3 Digital Surround Processor/Controller
S
ystem
Configuration
27
The SDP-3 provides a Subwoofer Peak Limiter that prevents the
subwoofer signal level from exceeding a preset value. The limiter is
factory preset to the OFF postion. This setting can be changed within
the limiter’s operating range of -5dB to +35dB, with -5dB providing
maximum limiting.
To turn on the limiter or to change its setting, select the SUB PK
LIMITER parameter in the Output Levels menu.
Press
▼
to select LIMITER, then press SELECT. Press
▲
to select ON.
Press DONE twice to return to the Output Levels menu. While readjust-
ing the system volume 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 SDP-3. A two-line display indicates the LIM-
ITER 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 system 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
OFF
+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, in a properly
calibrated system.