Bosch’s LBC 1400/10, LBC 1410/10, LBC 1420/10, and LBC 1430/10 are high-quality volume controls and program selectors designed to provide flexibility and control over public address (PA) systems. These devices are crucial for managing audio levels and selecting programs locally, ensuring optimal audio distribution and emergency communication. They offer a variety of models with different power ratings, tailored for different system requirements.

Key Features

• Power Ratings and Versions:

  • Available in 12 W, 36 W, and 100 W versions to meet varying power needs.
  • Two Override Versions:
    • Power-save version (/10 models): Override relay is activated during emergency calls.
    • Failsafe version (/20 models): Override relay is deactivated during emergency calls, ensuring continuous operation.

• Volume Control and Program Selection:

  • Volume Control: Allows local adjustment of the volume level for announcements or background music.
  • Program Selector: For selecting from up to 5 different programs.
  • During emergency announcements, the built-in relay ensures the message is broadcast at a preset level, overriding local volume settings.

• Compact and Unobtrusive Design:

  • The design and color are unobtrusive and blend easily into any interior.
  • Suitable for both 3-wire and 4-wire systems.

• Electrical Characteristics:

  • Low Total Harmonic Distortion (THD): <0.5% for clear, distortion-free audio.
  • Frequency Response: 50 Hz to 20 kHz (-1 dB).
  • Current Consumption: 20 mA at 24 VDC.

Installation and Configuration

• Ease of Installation:
  • Screw connections for secure installation.
  • The compact size allows easy integration into wall panels or mounting boxes.
• Relay Override Options:
  • Power-save and Failsafe versions provide flexible options for different emergency communication setups.
  • Built-in 24 VDC override relay ensures the system works reliably during an emergency.

Technical Specifications

Electrical Specifications:

Mechanical Specifications:

Environmental Specifications:

• Operating Temperature: -10 °C to +55 °C (14 °F to 131 °F)
• Storage Temperature: -40 °C to +70 °C (-40 °F to 158 °F)
• Relative Humidity: <95% (non-condensing)

Conclusion

The LBC 1400/10, LBC 1410/10, LBC 1420/10, and LBC 1430/10 volume controls and program selectors are essential components for effective public address systems. With their adjustable attenuation, program selection capabilities, and reliable emergency relay overrides, they provide superior control and flexibility for both routine and emergency announcements. The compact design and easy installation make them ideal for a variety of environments, and their high-quality performance ensures a long-lasting, reliable solution for any public address application.