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DC-1 Version 3 Digital Controller
System
Configuration
Subwoofer Frequency Response
The low pass filter attenuates high fre-
quencies at 24dB per octave. The values
given are for the 6dB point.
Subwoofer Output
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 SPEAKER CONFIG from the SPEAKER SETUP menu auto-
matically sets the speaker selections to the appropriate configuration for
THX listening. This configuration is not adjustable.
THX Configuration
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).
Setting
Output Levels
Select INTERNAL NOISE TEST or EXTERNAL NOISE TEST from the
Output Levels menu.
The INTERNAL NOISE TEST automatically disconnects all audio and
video inputs, disables any EQ functions, centers the Balance controls, and
sets the system volume to +00dB. The test signal circles the room according
to the speaker configuration you have defined in the Speaker Configuration
menu. For a full complement of speakers, the order is: Left Front, Center,
Right Front, Right Side, Left Side, Subwoofer, Right Rear, Left Rear.
