Surround Ex Configuration; Setting Output Levels - Lexicon DC-1 Owner's Manual

DC-1 Version 4 Digital Controller
Use of the subwoofer output is specified here. Selecting YES, then pressing
SELECT allows you to display and adjust the crossover frequency for the
subwoofer output. All summing and filtering is performed in the digital
domain. You can select four different crossover points (OFF, 40, 80 or
120Hz) for the subwoofer. Although you can bypass the crossover and run
a full range output if your subwoofer has an internal crossover, it is
generally best to use the crossover in the DC-1.
NO mutes the subwoofer output and disables the Subwoofer Level param-
eter. For any 5.1 channel input, selecting NO routes the LFE (.1 channel) to
any front speaker set to LARGE.
Selecting THX CONFIG from the SPEAKER SETUP menu automatically
sets the speaker selections to the traditional configuration for THX listening.
This configuration automatically sets rears to NONE and all of the filters to
80Hz. These settings are not adjustable.
Selecting SURROUND EX from the SPEAKER SETUP menu (available as of
software Version 4) automatically sets the speaker selections for a THX
SURROUND EX setup with two side and two rear speakers, and with all
filters set to 80Hz. These settings are not adjustable.
When DC-1 input and output levels are set properly, the entire system will
be calibrated to play films at the level intended by the director. Setting the
output levels is easy with a Sound Pressure Level (SPL) meter. Using the
DC-1's internally generated calibration signal, adjust the level of each
output to the same relative level (75dB).
System
Configuration
Subwoofer Output
Subwoofer Frequency Response
The low pass filter attenuates high fre-
quencies at 24dB per octave. The values
given are for the 6dB point.
THX Configuration
SURROUND EX
Configuration
Setting
Output Levels
25