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

Plena Mixer Amplifier Installation and Operating Manual External settings and connections

en 17

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