Bosch LBB 1903/10 User Manuals

Table of Contents

• Important safeguards

  3
• About this manual

  4
• Safety precautions

  4
• Table of contents

  5
• 1 About the mixer amplifier

  7
  • 1.1 Controls and connections (front)

    8
  • 1.2 Controls and connections (rear)

    9
• 2 Internal settings

  10
  • 2.1 Setting the VOX for microphone input 1

    10
  • 2.2 Setting the speech filters

    10
  • 2.3 Setting the chime volume

    11
  • 2.4 Setting the output voltage for LBB1903, LBB1906 and LBB1912

    11
  • 2.5 Setting the output voltage for LBB1914

    11
• 3 Installation in rack

  12
• 4 External settings and connections

  13
  • 4.1 Connect the DC supply (battery)

    13
  • 4.2 Priority microphone

    13
  • 4.3 Chime ON/OFF-switch

    14
  • 4.4 Microphone inputs

    15
  • 4.5 Emergency input

    15
  • 4.6 Music source inputs

    16
  • 4.7 Connecting the line output

    16
  • 4.8 Connecting loudspeakers

    17
    • 4.8.1 Constant voltage loudspeakers

      17
    • 4.8.2 Low impedance loudspeakers

      18
  • 4.9 Mains connection

    18
• 5 Operation of mixer amplifier

  19
  • 5.1 Source selection

    19
  • 5.2 Volume and tone control

    19
  • 5.3 Zone selection (LBB1914/10 only)

    19
• 6 Technical data

  20
  • 6.1 Electrical

    20
  • 6.2 Performance

    20
  • 6.3 Inputs

    20
  • 6.4 Outputs

    21
  • 6.5 Environmental conditions

    21
  • 6.6 General

    22