There are two (2) bass management functions for the Control Room monitor feeds. Both
techniques perform the same functions found on many surround playback systems. These
functions are as follows:
5 TO LFE: A LFE monitor feed is created from the five surround monitor feeds
•
A split of the outputs from the Left, Right, Center, Left Surround, and Right
Surround monitor feeds is fed to the LFE Filter input
•
The output of the LFE Filter is fed to the LFE monitor feed
•
The LFE Program output is not fed
•
Typically not used for stereo monitoring
The 5 TO LFE function allows the use of the subwoofer for bass reinforcement when a LFE
channel has not been created for the Surround Program outputs or the Playback source
does not contain a LFE channel.
LFE TO LCR: The LFE monitor feed is redirected to the front surround monitor feeds
•
The LFE monitor feed is folded into the Left, Center, and Right monitor feeds
•
The LFE monitor feed is cut
The LFE TO LCR function allows the LFE channel to be added to the front surround (LCR)
monitors, while defeating the subwoofer feed. This allows monitoring of the full surround
content without the use of a subwoofer.
13.2.2
LFE And Control Room Insert Controls
The controls for the LFE Filter and bass management are located in the Center Section.
The Control Room Insert activation switch is included with these controls
The LFE and Control Room Insert controls function as follows:
LFE FLTR (Filter): On/Off switch for the LFE Filter
•
Activates LFE Filter
•
Illuminates in green when engaged
LFE BYP (Bypass): Engages a hardwire bypass of the LFE Filter routing
•
Illuminates in green when engaged
120 HZ (80): Selects between two (2) LFE Filter frequencies
•
80 Hz is the default setting (switch not engaged)
•
120 Hz is selected when this switch is engaged
•
Illuminates in green when engaged
5 TO LFE: Activates the Surround to LFE fold down function
•
Sums a split of the output of the L, R, C, Ls, and Rs monitor feeds to
mono and routes it to the LFE Filter Input (FLT IN)
•
Illuminates in green when engaged
LFE TO LCR: Activates the LFE to LCR function
•
Routes the output of the LFE monitor feed to the Left, Center, and
Right monitor feeds
•
Defeats the LFE monitor feed
•
Illuminates in green when engaged
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