BOSCH Horn LBC-3491

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BOSCH LBC 3491/12 Horn Loudspeakers

▶High efficiency drivers
▶Rated power 10 Watt up to 15 Watt (max. power)
▶Wide opening angle
▶Excellent speech reproduction
▶Simple power setting

Bosch high-efficiency horn loudspeakers provide excellent speech reproduction and sound distribution for a wide scope of outdoor applications. They are ideal for sports grounds, parks, exhibitions, factories and swimming pools.

System overview
The LBC 3491/12 is a rectangular model 10 Watt, and is made from ABS.

Functions
All four models are for direct connection to a 100 V line output and are finished in light grey (RAL 7035). The horns are water and dust protected. The horn loudspeakers include a 100 V transformer with taps on the primary winding to allow different power settings. Nominal full-power, half-power or quarter-power radiation (in 3 dB steps) can easily be selected by connecting the amplifier output to the appropriate tap. A 2 m four-core cable is fitted to the horns. Each core is a different color, and is connected to one of the primary taps on the transformer. The horn loudspeakers are supplied complete with sturdy adjustable mounting brackets, allowing the sound beam to be accurately directed.

Certifications and 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 much less chance of failure or performance deterioration.
Safety : acc. to EN 60065
Self-extinguishing : acc. to UL 94 V0
Water and dust protection : acc. to EN 60529‑IP65

Technical Specifications
Electrical

• Max power 15 Watt
• Rated power (PHC) 10 / 5 / 2.5 Watt
• Sound pressure level at rated power / 1 W (1 kHz, 1 m) 118 dB / 108 dB (SPL)
• Sound pressure level at rated power / 1 W (2 kHz, 1 m) 121 dB / 111 dB (SPL)
• Effective frequency range (-10 dB) 480Hz to 5.5kHz
• Opening angle 1 kHz / 4 kHz (-6 dB)
  – horizontal 90° / 40°
  – vertical 130° / 45°
• Rated voltage 100 V
• Rated impedance 1000 ohm
• Connection 2 m, 4-wire cable

Mechanical

• Dimensions (L x W) 267 x 171 mm (10.51 x 6.73 in)
• Aperture diameter 171 x 267 mm (6.73 x 10.51 in)
• Overall length 276 mm (10.87 in)
• Color Light grey (RAL 7035)
• Weight 1.4 kg (3.08 lb)

Environmental

• Operating temperature -25 ºC to +55 ºC (-13 ºF to +131 ºF)
• Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
• Relative humidity <95%