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Connecting Loudspeakers; Constant Voltage Loudspeakers - Bosch LBB 1903/10 Installation And Operating Manual

Plena mixer amplifier installation and operating manual
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Plena Mixer Amplifier | Installation and Operating Manual |

4.8 Connecting loudspeakers

100V
70V
100V
8 O hm
0
LBB1903/10
LBB1906/10
LBB1912/10
JP901
100V
100V
70V
70V
8 O hm
0
LBB1914/10
Figure 4.8

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
100V
0
70V
70V
0
JP802
8 O hm
0
Call Only
0
0
0
Mix O nly
0
+
24V
24V
-
Call Active
Call Only
0
0
0
0
Zone 1
Call/Mix
0
0
Z1 Front
JP902
100/70
8 O hm
Call/Mix
0
0
0
Zone 2
Call/Mix
0
0
Z2 Front
0
Mix O nly
0
0
+
24V
Call Active
24V
-
External settings and connections
Tel/E
mer .
L
0
R
0 2
CD
Out
Chim
e
Aux
1- -3
Line
Out 1V
In
4 .5
Mic/ Line
Inc
Mic/ Line
1
2
3
4
Call/Mix
Call Only Mix Only
24VDCIn
100V 0 70V
0
8
0
100/70V 0 100/70V 0
Call/Mix
Call/Mix
Call Only
Mix Only
direct out
direct out
100/70V
100/70V
100V
70V
Figure 4.9
Tel/E
mer .
L
0
R
0 2
CD
Out
Chim
e
Aux
1- -3
Line
Out 1V
In
4 .5
Mic/ Line
Inc
Mic/ Line
1
2
3
4
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
Call/Mix
Zone 1
Zone 2
Call Only
direct out
100/70V
100/70V
100/70V
100/70V
Figure 4.10
en | 17
LBB1903/10
LBB1906/10
LBB1912/10
115 V/23
0V
Warn
ing
This
appa
ratus
must
be earth
ed
24VDCIn
Call/Mix
Call Only Mix Only
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 direct out 8 Ohm
LBB1914/10
115 V/23
0V
Warn
ing
This
appa
ratus
must
be earth
ed
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
8 Ohm
4 Ohm
4 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
Mix Only
100/70V
Call/Mix direct out 8 Ohm

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Lbb 1906/10Lbb 1912/10Lbb 1914/10