Bosch Appliances LBB 1903/10, LBB 1912/10 manual Operation of mixer amplifier, Source selection

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Plena Mixer Amplifier Installation and Operating Manual Operation of mixer amplifier

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5Operation of mixer amplifier

2

3

4

8

9

Only for LBB1914/10

Plena Mixer Amplifier

1

0dB -6 dB

-20 dB

2

Select

CD

AUX

Master

Zone 1

Zone 2

Power

3

4

Line

Figure 4.6

Use the supplied mains cord to connect the system to the mains supply.

1

5

6

7

10

11

12

13

Figure 5.1

5.1 Source selection

Use the music source selector (8) to select one of the connected music sources.

Use the input volume controls (3, 4, 5, 6 and 7) to balance the sound level of the microphone inputs and the background music.

5.2 Volume and tone control

Use the master volume control (11) to control the volume of the music/microphone mix.

The treble and bass tone controls (9 and 10) affect the microphones as well as the music.

5.3 Zone selection (LBB1914/10 only)

Use the zone selection buttons (12 and 13) to route the music/microphone mix from the amplifier output to loudspeaker zone 1 and/or loudspeaker zone 2. Priority announcements, however, are always routed to both zones, irrespective of the position of the zone selection buttons.

Bosch Security Systems 2003-09 3922 988 92883en

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Contents Plena Mixer Amplifier Page Important safeguards About this manual Safety precautionsTable of contents Bosch Security Systems 2003-09 3922 988 92883en About the mixer amplifier Phantom PowerControls and connections front Controls and connections rear Setting the VOX for microphone input Internal settingsSetting the speech filters Setting the output voltage for LBB1903, LBB1906 and LBB1912 Setting the chime volumeSetting the output voltage for LBB1914 Installation in rack Connect the DC supply battery External settings and connectionsPriority microphone 115V/230V Chime ON/OFF-switchEmergency input Microphone inputsMusic source inputs Connecting the line outputLBB1912/10 Connecting loudspeakers2Low impedance loudspeakers Mains connectionZone selection LBB1914/10 only Volume and tone controlOperation of mixer amplifier Source selectionInputs Technical dataElectrical PerformanceEnvironmental conditions OutputsGeneral Page For more information visit