Bosch Appliances LBB 1914/10, LBB 1912/10, LBB 1906/10 manual Connecting loudspeakers, LBB1912/10

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Plena Mixer Amplifier Installation and Operating Manual External settings and connections

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4.8 Connecting loudspeakers

100V

 

100V

 

 

 

 

0

70V

 

70V

 

 

100V

70V

0

JP802

8 Ohm

 

 

8 Ohm

 

 

0

 

0

 

 

 

0

Call Only

 

0

 

 

 

0

Mix O nly

 

 

LBB1903/10

 

 

0

LBB1906/10

 

24V

+

LBB1912/10

Call Active

 

- 24V

 

 

 

 

 

 

 

 

 

 

 

 

LBB1903/10

 

 

 

 

 

 

 

 

 

 

 

 

 

LBB1906/10

 

 

 

 

 

 

 

 

 

 

 

 

 

LBB1912/10

 

 

 

Call/Mix

 

Call Only Mix Only 24VDCIn

 

 

Call/Mix

 

Call Only Mix Only 24VDCIn

 

100V

0

70V

0

8

0 100/70V 0

100/70V 0

100V

0

70V

0

8

0 100/70V 0

100/70V 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8 Ohm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 Ohm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 Ohm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8 Ohm

8 Ohm

 

 

 

 

 

 

 

 

 

 

 

 

 

8 Ohm

8 Ohm

Call/Mix

 

 

Call/Mix

Call Only

Mix Only

 

 

 

 

 

 

 

direct out

 

 

direct out

100/70V

100/70V

 

 

 

 

 

 

 

100V

 

 

70V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Call/Mix direct out 8 Ohm

 

Figure 4.9

 

0

 

0

JP901

 

100V 100V

Z1 Front

 

JP902

70V

100/70

 

 

70V

8 Ohm

8 Ohm

 

0

 

 

0

 

Z2 Front

 

0

LBB1914/10

Call Active

Call Only

00

Zone 1 Call/Mix

0 0

Call/Mix

00

Zone 2

Call/Mix

0 0

Mix O nly

0 0

24V +

- 24V

 

 

 

 

 

LBB1914/10

 

Call/Mix Zone 1

Zone 2 Call Only

Mix Only 24VDCIn

 

Call/Mix

Zone 1

Zone 2 Call Only Mix Only 24VDCIn

100/70V/8

0 100/70V 0 100/70V 0 100/70V 0 100/70V 0

 

100/70V/8

0 100/70V 0 100/70V 0 100/70V 0 100/70V 0

 

 

 

 

 

 

 

 

 

8 Ohm

 

 

 

 

 

 

 

 

 

4 Ohm

 

 

 

 

 

 

 

 

 

4 Ohm

 

 

 

 

 

 

 

 

 

8 Ohm

8 Ohm

 

 

 

 

 

 

 

 

8 Ohm

8 Ohm

Call/Mix

Zone 1

Zone 2

Call Only

Mix Only

 

 

 

 

direct out

100/70V

100/70V

100/70V

100/70V

 

 

 

 

100/70V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Call/Mix direct out 8 Ohm

 

Figure 4.8

Figure 4.10

4.8.1 Constant voltage loudspeakers

The mixer amplifier can drive 100 V constant voltage loudspeakers at full power (100 V) or half power (70 V). Connect the loudspeakers in parallel and check the loudspeaker polarity for in-phase connection. The summed loudspeaker power should not exceed the rated amplifier power. Ensure that the jumper(s) for loudspeaker voltage selection is / are properly set (see §2.4).

You can use the Call Only output for 3-wire remote volume control override. In this case, ensure that the selected voltage for the Call Only output is the same as for the direct output or the zone outputs.

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 speech filters Internal settingsSetting the VOX for microphone input Setting the output voltage for LBB1914 Setting the chime volumeSetting the output voltage for LBB1903, LBB1906 and LBB1912 Installation in rack Priority microphone External settings and connectionsConnect the DC supply battery 115V/230V Chime ON/OFF-switchEmergency input Microphone inputsMusic source inputs Connecting the line outputLBB1912/10 Connecting loudspeakers2Low impedance loudspeakers Mains connectionOperation of mixer amplifier Volume and tone controlSource selection Zone selection LBB1914/10 onlyElectrical Technical dataPerformance InputsEnvironmental conditions OutputsGeneral Page For more information visit