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Bosch Security Systems | 2003-09 | 3922 988 92883en
Plena Mixer Amplifier | Installation and Operating Manual | en | 10
2 Internal settings
Figure 2.1
Figure 2.2
2.1 Setting the VOX for microphone input 1
Input 1 has the option of a voice-controlled priority (VOX), which will overrule all other inputs when it recognizes
a voice signal. To activate this function, set the VOX-jumper (JP406) to ON.
2.2 Setting the speech filters
The speech intelligibility can be improved by cutting off the lower frequencies of the signal. To activate this filter for
each microphone input, set the respective filter jumper (JP401 for input 1, JP402 for input 2, JP403 for input 3 and
JP405 for input 4) to ON.
Internal settings
Mic. 1
Mic. 2
Mic. 3
Mic. 4
VOX
OFF
ON
123 123
70V
JP802
LBB1903/10
LBB1906/10
LBB1912/10
100V
123 123
JP405
JP403
JP402
JP401
VR401
JP802
70V
100V
JP406
Mic.1
Mic.2
Mic.3
Mic.4
VOX
JP405
JP403
JP402
JP401
JP406
Mic. 1
Mic. 2
Mic. 3
Mic. 4
VOX
OFF
ON
123 123
70V/100V
8Ohm
123 123
JP405
JP403
JP402
JP401
JP902
JP406
Mic.1
Mic.2
Mic.3
Mic.4
VOX
JP405
JP403
JP402
JP401
JP406
70V
100V
123 123
JP901
LBB1914/10
JP902
JP901
VR401