Bosch LBB 1930 - External Settings and Connections; Connecting Loudspeakers; Constant Voltage Loudspeaker Setup; Loudspeaker Connection Diagrams

Bosch Security Systems | 2003-09 | 3922 988 92983en
Plena Booster Amplifier | Installation and Operating Manual | en | 16
4.5 Connecting loudspeakers
Figure 4.8
4.5.1 Constant voltage loudspeakers
The booster 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.
External settings and connections
100V 7 0V 0 0 8 - +
24V DC IN
100 V 70 V
8 Ohm
8Ohm
8Ohm
8Ohm
8Ohm
8Ohm
4Ohm
4Ohm
LBB1930
LBB1935
2
3
0
V
-
24
0
V
-
1
0
0
V
1
0
0
V
1
0
0
V
0
V
7
0
V
0
0
8
-
+
L
in
e
f
u
s
e
2
5
0V
T
1
A
A
p
pa
r
a
t
u
sde
l
iv
e
r
e
d
c
o
n
n
e
c
t
e
df
o
r
2
3
0
V
-
T
h
i
s
a
p
p
a
r
a
t
u
s
m
u
s
t
b
e
e
a
r
t
h
e
d
W
a
r
n
i
ng
2
4
V
D
C
IN
line
o
u
t
1
2
3
1
2
3
G
N
D
G
N
D
+
+
-
-
Prior ity Only No Prior ity
100V 70V008
100V 100V00
Direct Output
Prior ity ControlledOutput
A
p
p
a
r
at
u
s
d
e
l
i
v
e
r
e
d
c
on
n
e
c
t
e
d
f
o
r
23
0
V
-
R
a
t
e
d
i
n
p
u
t
L
i
n
e
f
u
s
e
T
1
0
L
25
0
V
p
o
w
e
r
:
1
6
00V
T
h
is
a
p
p
a
r
a
t
u
s
m
u
s
t
b
ee
a
r
t
h
e
d
W
a
r
n
i
n
g
P
r
io
r
i
t
y
C
o
n
t
r
o
l
l
e
d
O
u
t
p
u
t
N
o
pr
io
ri
t
y
In
p
u
t
1
-
Pr
i
o
ri
t
y
In
p
u
t
1
P
r
io
r
it
y
S
l
a
v
e
I
n
p
u
t
1
0
0
V
In
p
u
t
2
E
n
a
b
le
I
npu
t
2
-
P
ro
g
ram
P
rio
rit
y
o
n
l
y
D
i
r
e
c
t
O
u
t
p
u
t
2
4V
D
C
IN
I
n
p
ut
L
o
o
pt
h
r
o
ugh
Lo
o
p
t
h
r
o
u
g
h
I
n
p
u
t
10
0
V
70
V
0
0
8
1
0
0
V
0
10
0
V
0
Priority Only
No Priority
70 V100 V
8 Ohm
8Ohm
8Ohm
8Ohm
8Ohm
8Ohm
4Ohm
4Ohm
LBB1938
VU
LBB1930
LBB1935
100V
70V
8Ohm
0
0
VU
100V
70V
8Ohm
0
0
70V100V
F701 F702
No Priority
Priority Only
0
0
LBB1938
Figure 4.7
Figure 4.9
Figure 4.10