
Product information
Bosch LBD3905-D is a 12W bi-directional cabinet loudspeaker in black for 100V public address systems. It sends sound out in two directions from one cabinet, so a single unit can cover both sides of a corridor, an open-plan room or a wide space.
Key features
- 12W rated power: enough level for medium rooms, corridors and open areas.
- 100V line input: rated input voltage of 100 V for constant-voltage PA systems.
- 150 Hz to 15 kHz response: tuned for speech intelligibility and background music (-10 dB).
- 85.8 dB sensitivity: measured at 1 W, 1 m, 1 kHz octave.
- Defined coverage: 254 x 254 degrees coverage at both 1 kHz and 4 kHz (-6 dB) for very wide, even distribution.
- Cabinet size: 243 x 230 x 131 mm and 1.9 kg.
- Black finish: a neat cabinet for exposed indoor mounting.
- Indoor environmental range: operates from -5 to 55 degrees C and stores from -40 to 70 degrees C.
Ideal for
Corridors, open-plan offices, waiting areas, lobbies and other spaces where one loudspeaker has to cover a wide area in more than one direction.
Buy Bosch LBD3905-D in India from Universal AV Solutions with supply, installation and after-sales support across Delhi NCR and pan-India. Contact us for the latest price and a GST quotation.
Bosch LBD3905-D at a glance
| Product type | Cabinet loudspeaker for public address |
|---|---|
| Rated power | 12 W |
| Rated input voltage | 100 V |
| Frequency range (-10 dB) | 150 Hz to 15 kHz |
| Sensitivity (1 W, 1 m, 1 kHz) | 85.8 dB |
| Coverage (-6 dB, 1 kHz) | 254 x 254 deg |
| Coverage (-6 dB, 4 kHz) | 254 x 254 deg |
| Dimensions (H x W x D) | 243 x 230 x 131 mm |
| Weight | 1.9 kg |
| Colour | Black |
Two-direction sound from one cabinet
The bi-directional design of the LBD3905-D widens coverage compared with a single-direction cabinet, which reduces the number of speakers needed in long or open spaces.
- 254 x 254 degrees coverage at both 1 kHz and 4 kHz (-6 dB).
- Runs from a 100V PA amplifier or mixer amplifier.
- Sensitivity of 85.8 dB (1 W, 1 m) suits close-to-medium listening distances.
Bosch LBD3905-D FAQs
Can the Bosch LBD3905-D be used on a 100V line?
Yes. The specification lists a rated input voltage of 100 V, so it is intended for 100V constant-voltage public address systems driven by a suitable PA amplifier or mixer amplifier.
What is the Bosch LBD3905-D?
The Bosch LBD3905-D is a 12W black cabinet loudspeaker for 100V public address systems, used for speech announcements and background music.
What does bi-directional mean on the LBD3905-D?
It means the cabinet radiates sound in two directions, giving very wide coverage of 254 x 254 degrees at -6 dB from a single loudspeaker.
Who is the LBD3905-D for?
It suits corridors, open offices, lobbies and waiting areas that need wide, even PA coverage.
How much does the Bosch LBD3905-D cost?
Contact Universal AV Solutions for the latest price and a GST quotation.
Do you provide installation and support?
Yes. Universal AV Solutions provides supply, installation and after-sales support across Delhi NCR and pan-India.
Good to know: Specifications are based on the manufacturer's published information and may change. Contact Universal AV Solutions to confirm what is included with your order. All brand names are trademarks of their respective owners.
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