Bosch LBB 1990 Plena Voice Alarm Controller

(4 customer reviews)
BOSCH

The Bosch LBB 1990 Plena Voice Alarm Controller is a professional-grade solution designed to manage emergency paging and evacuation messaging with superior reliability. Part of the Bosch Plena Voice Alarm range, it provides secure control of alarms, background music, and announcements in commercial and public buildings, ensuring safe communication when it matters most.

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The Bosch LBB 1990 Plena Voice Alarm Controller is a high-performance voice alarm management unit engineered for dependable evacuation and emergency communication in modern public environments. Suitable for malls, schools, hotels, offices, industrial sites, and transportation hubs, it ensures that critical announcements are delivered clearly and without interruption during urgent situations.

This powerful controller integrates seamlessly with the Plena Voice Alarm System, offering full supervision of connected devices such as amplifiers, microphones, speakers, and zone controllers. It constantly monitors the system’s integrity — including amplifier load, speaker lines, and communication wiring — ensuring immediate fault reporting and compliance with international safety standards (such as EN 54-16).

With its built-in digital message player, the Bosch LBB 1990 Plena Voice Alarm Controller can automatically broadcast pre-recorded evacuation messages in a controlled and prioritized manner. A highly intuitive interface simplifies daily operation, making it easy for facility staff to manage public address and emergency announcements without technical complexity.

The controller supports multiple paging zones, enabling targeted communication based on the affected area while maintaining background music distribution elsewhere. Its superior audio processing ensures clear voice intelligibility, which is essential for proper evacuation instructions and crowd management.

The system includes backup power monitoring, fault logging, and secure fail-safe operation to ensure maximum reliability — even in the event of main power failure. Designed to be scalable, it can expand as building safety demands grow, making it a future-ready investment.

Ideal for integrated safety communication, the Bosch LBB 1990 Plena Voice Alarm Controller delivers advanced protection, operational control, and high-grade audio performance — ensuring the safety and confidence of building occupants in any emergency situation.

LBB 1990/00

Brand

Technical specifications
 
Voltage 230/115VAC, ±15%, 50/60 Hz
Current inrush 8 A
Max power consumption 600 VA
 
Voltage 24 VDC, +15% / -15%
Current max 14 A
 
Output power (rms/maximum) 240 W / 360 W
Power reduction on backup power -1 dB
Frequency response 60 Hz to 18 kHz (+1/-3 dB at -10 dB ref. rated output)
Distortion <1% at rated output power, 1 kHz
Bass control -8/+8 dB at 100 Hz
Treble control -8/+8 dB at 10 kHz
  1 x
Connector XLR, 6.3 mm jack
Sensitivity 1 mV (mic), 1 V (line)
Impedance >1 kohm (mic); >5 kohm (line)
S/N (flat at max volume) >63 dB (mic); >70 dB (line)
S/N (flat at min volme/muted) >75 dB
CMRR >40 dB (50 Hz – 20 kHz)
Headroom >25 dB
Speech filter -3 dB at 315 Hz, high-pass,

6 dB/oct

Phantom power supply 12 V (mic mode only)
VOX trigger level -20 dB (100 µV mic / 100 mV line) or via input contact
Limiter Automatic
(BGM and PC call station)
Connector Cinch, stereo converted to mono, unbalanced
Sensitivity 200 mV
Impedance 22 kohm
S/N (flat at max volume) >70 dB
S/N (flat at min volume/ muted) >75 dB
Headroom >25 dB
12 x (6 EMG, 6 business)
Connectors MC1,5 / 14-ST-3,5
Activation Programmable
Supervision On EMG inputs, programmable
Supervision method Series / parallel resistor
Connector MSTB 2,5 /16-ST
Power handling capacity 1000 W
1 x
Connector Cinch, 2 x mono
Nominal level 350 mV
Impedance <1 kohm
 

 

Connectors

 

MSTB 2,5 /16-ST, floating

100 V output 700 W rated per zone
Volume override types 3-wire, 4-wire (24 V), 4-wire failsafe
BGM zone output Attenuation 70 / 50 /35 /25 / 18 / 13 V for

0 / -3 / -6 / -9 / -12 / -15 dB

120 / 60 / 30 / 15 / 8 /4 W

Connector Type MC 1,5/14-ST-3,5
Rating 250 V, 7A, voltage free
Emergency active relay NO / COM / NC
Call active relay NO / COM / NC
Fault relay NO / COM / NC normally energized (failsafe)
General purpose relays NO / COM
Max power 550 W
-3dB 440 W
-6dB 340 W
Pilot tone* 136 W
Idle 60 W
Max power 14.0 A (336 W)
-3 dB 12.5 A (300 W)
-6 dB 9.5 A (228 W)
Pilot tone* 2.5 A (60 W)
Idle 0.9 A (22 W)
Data format WAV-file, 16-bit PCM, mono
Supported sample rates (fs) 24 / 22.05 / 16 / 12 / 11.025 /

8 kHz

Frequency response
at fs=24kHz 100 Hz to 11 kHz (+1/-3 dB)
at fs=22.05kHz 100 Hz to 10 kHz (+1/-3 dB )
at fs=16kHz 100 Hz to 7.3 kHz (+1/-3 dB )
at fs=12kHz 100 Hz to 5.5 kHz (+1/-3 dB)
at fs=11.025kHz 100 Hz to 5 kHz (+1/-3 dB)
at fs=8kHz 100 Hz to 3.6 kHz (+1/-3 dB)
Distortion <0.1% at 1 kHz
S/N (flat at max volume) >80 dB
Memory capacity 16 MB Flash ROM
Recording / playback time 1000 seconds at fs = 8 kHz 333 seconds at fs = 24 kHz
Number of messages 255 max
Supervision Flash ROM Continuous checksum control
Supervision DAC 1 Hz pilot tone
Data retention time >10 years
Dimensions (H x W x D) 144 x 430 x 370 mm (19″ wide, 3U high)
Weight Approx. 21.17 kg
Mounting 19”rack
Color Charcoal

Based on 4 reviews

4.8 overall
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  1. Randall Knoblauch

    Great sound and zero connectivity issues. Would definitely order again.

    Randall Knoblauch

  2. Ashutosh

    Decent product

    Ashutosh

  3. Kevin

    Excellent sound quality amplifier.
    Sakthi AV Tronics deliver on time and explain all doubts in polite manner. Service is very good with affortable price.

    Kevin

  4. Avenue17

    I apologise, but, in my opinion, you are not right. I am assured. Let’s discuss it. Write to me in PM.

    Avenue17

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