Bosch Appliances Car Amplifier LBB 1906/10 User Manual

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | 

en | 17

4.8 Connecting 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.

0

0

0

8 Ohm

8 Ohm

70V

100V

100V

70V

JP802

100V

0

70V

0

0

+

-

24V

24V

Call Only
0

Mix Only

0

Call Active

8 Ohm

8 Ohm

70V

70V

100V

100V

JP901

0

0

+

-

24V

24V

Call Only

Zone 2

Zone 1

Call/Mix

Call/Mix

Call/Mix

Call Active

Mix Only

Z1 Front

Z2 Front

JP902

100/70

0

0

0

0

0

0

0

0

0

0

0

0

0

External settings and connections

115V/2

30V

Appara

tus deliv

ered

connec

ted for

230V-

Rated

input

power

: 400V

A

This ap

paratus

must b

e earth

ed

Warning

2

1

3

4

Mic/Lin

e

Mic/Lin

e

CD

L

R

Aux

Line O

ut 1V

Inc

Out

In

Tel/Eme

r.

0

0 2

Chime

4 .5

1- -3

Call/M

ix

24VDC

In

Call On

ly Mix

Only

100V

0 70V

0

100/70V

0 100/7

0

V 0

8

0

Call/Mix

direct out

100V

Call/Mix

direct out

70V

Call Only

100/70V

Mix Only
100/70V

8 Ohm

Call/Mix direct out 8 Ohm

Call/Mix

24VDCIn

Call Only Mix Only

100V 0 70V

0

100/70V 0 100/70V 0

0

8

100V 0 70V

0

100/70V 0 100/70V 0

0

8

Call/Mix

24VDCIn

Call Only Mix Only

4 Ohm

4 Ohm

8 Ohm

8 Ohm

8 Ohm

8 Ohm

115V/2

30V

Appara

tus deliv

ered

connec

ted for

230V-

Rated

input

power

: 400VA

This ap

paratus

must b

e earth

ed

Warning

2

1

3

4

Mic/Lin

e

Mic/Lin

e

CD

L

R

Aux

Line O

ut 1V

Inc

Out

In

Tel/Eme

r.

0

0 2

Chime

4 .5

1- -3

Call/Mix

direct out

100/70V

Zone 1

100/70V

Zone 2

100/70V

Call Only

100/70V

8 Ohm

Mix Only
100/70V

Call/Mix direct out 8 Ohm

4 Ohm

4 Ohm

8 Ohm

8 Ohm

8 Ohm

8 Ohm

24VDCIn

Call/Mix

Zone 1

Zone 2 Call Only Mix Only

100/70V/8

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

24VDCIn

Call/Mix

Zone 1

Zone 2 Call Only Mix Only

100/70V/8

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

Call/Mix

24VDCIn

Call Only Mi

x Only

100V 0

70V 0

100/70V 0 100

/70V 0

8

0