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BOSCH LBC 3090 Ceiling Speaker



  • Suitable for speech and music reproduction
  • Increased sensitivity
  • Flush-mounting in the ceiling cavity
  • Easy to install
  • Simple power setting

BOSCH LBC 3090 Ceiling Speaker Specs:

Bosch LBC 3090 ceiling speaker offers a combination of quality, performance, and innovation in the public address. They are the result of over half a century’s experience in professional audio and meet virtually all sound reinforcement system requirements.


A flush-mounting ceiling loudspeaker is available for general purpose applications. This full-range loudspeaker offers a high sound pressure level and a wide frequency range and is suitable for both speech and music reproduction in shops, department stores, schools, offices, sports halls, hotels, and restaurants. The loudspeaker assembly consists of a single-piece, 6 W dual-cone loudspeaker, and frame, with a 100 V matching transformer mounted on the back. A circular metal grille is integrated with the front. The appearance and neutral white color have been selected to be unobtrusive in virtually all interiors. A dust cover protects the rear.

Certifications & Approvals

All Bosch loudspeakers are designed to withstand operating at their rated power for 100 hours in accordance with IEC 268-5 Power Handling Capacity
(PHC) standards. Bosch has also developed the Simulated Acoustical Feedback Exposure (SAFE) test to demonstrate that they can withstand two times their rated power for short durations. This ensures extra reliability under extreme conditions, leading to higher customer satisfaction, longer operating life, and a much less chance of failure or performance deterioration.


The assembly can be simply and quickly installed into a hole in the ceiling cavity and secured by two integral spring-loaded ceiling locking clamps (for ceilings and wallboards from 9 to 25 mm thick). A circular template for marking a 172 mm (6.7 in) diameter hole is included with the loudspeaker.

Terminal Block

The unit has a two-way terminal block with push connections suitable for loop-through wiring. Three primary taps are provided on the matching transformer to allow the selection of nominal full-power, half-power, or quarter-power radiation (i.e. in 3 dB steps).

LBC 3080/01 Fire Dome

During a fire, the ceiling cavity can allow fire or smoke to spread throughout a building. To inhibit fire from entering the cavity via the ceiling loudspeaker, it can be fitted with an LBC 3080/01 steel fire dome. This is mounted on the loudspeaker assembly using four self-tapping screws supplied with the fire dome. The fire dome has knock-out holes for two grommets (supplied) and two cable glands (PG 13).


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