Bosch LBB 1903/10 - Page 34

24
MIXER AMPLIFIER
0
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0
8Ohm
8Ohm
70V
100V
100V
70V
JP802
100V
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70V
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-
24V
24V
Call Only
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Mix Only
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Call Active
8Ohm
8Ohm
70V
70V
100V
100V
JP901
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24V
Call Only
Zone 2
Zone 1
Call/Mix
Call/Mix
Call/Mix
Call Active
Mix Only
Z1 Front
Z2 Front
LBB1914/10
LBB1903/10
LBB1906/10
LBB1912/10
JP902
100/70
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Call/Mix
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100/70V
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8 Ohm
Call/Mix direct out 8 Ohm
Call/Mix
24VDCIn
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4 Ohm
4 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
LBB1903/10
LBB1906/10
LBB1912/10
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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
Zone1 Zone2
Call Only Mix Only
100/70V/8 0 100/70V 0100/70V 0 100/70V 0 100/70V 0
24VDCI n
Call/Mix
Zone1 Zone2
Call Only Mix Only
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LBB1914/10
Call/Mix
24VD
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In
Cal
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Only
Mi
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70
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80
en
Connecting loudspeakers
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 page 10).
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.
Low impedance loudspeakers
Connect low impedance loudspeakers to the 8 Ohm/0 terminals. This output can deliver the rated output power into an
8 Ohm load.
Connect multiple loudspeakers in a series/parallel-arrangement to make the combined impedance 8 Ohm or higher.
Check the loudspeaker polarity for in-phase connection. Ensure that the jumper(s) for loudspeaker voltage selection is /
are properly set (see page 10).
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Raccordement de haut-parleurs
Haut-parleurs à tension constante
L’amplificateur mélangeur peut alimenter des haut-parleurs à tension constante de 100 V à pleine puissance (100 V) ou
à mi-puissance (70 V).
Il convient de raccorder les haut-parleurs en parallèle et de vérifier la polarité de ceux-ci pour le raccordement en
phase. La puissance totale des haut-parleurs ne doit pas dépasser la puissance nominale de l’amplificateur.
Les cavaliers de sélection de la tension des haut-parleurs doivent être réglés correctement (voir page 11).
Vous pouvez utiliser la sortie Call Only pour une commande prioritaire de réglage du volume à distance à trois fils.
Dans ce cas, il convient de veiller à ce que la tension sélectionnée pour la sortie Call Only soit identique à celle de la
sortie directe ou des sorties de zones.