Operation Of Mixer Amplifier; Source Selection; Volume And Tone Control; Zone Selection (Lbb1914/10 Only) - Bosch LBB 1903/10 Installation And Operating Manual

Plena Mixer Amplifier | Installation and Operating Manual |
5

Operation of mixer amplifier

2 3
Plena Mixer Amplifier
1
0 dB
-6 dB
-20 dB
3
Power
Figure 4.6
Use the supplied mains cord to connect the system to the mains supply.
1 5
Figure 5.1

5. 1 Source selection

• Use the music source selector (8) to select one of the connected music sources.
• Use the input volume controls (3, 4, 5, 6 and 7) to balance the sound level of the microphone inputs and the
background music.

5.2 Volume and tone control

• Use the master volume control (11) to control the volume of the music/microphone mix.
• The treble and bass tone controls (9 and 10) affect the microphones as well as the music.

5.3 Zone selection (LBB1914/10 only)

• Use the zone selection buttons (12 and 13) to route the music/microphone mix from the amplifier output to
loudspeaker zone 1 and/or loudspeaker zone 2. Priority announcements, however, are always routed to both
zones, irrespective of the position of the zone selection buttons.
Bosch Security Systems | 2003-09 | 3922 988 92883en
4 8
2 Select
CD AUX
4
Line
6 7
Operation of mixer amplifier
9
Master
10
en | 19
Only for LBB1914/10
Zone 1 Zone 2
11 12 13