Bosch LBC3493-12-US, LBC3492-12-US, LBC3491-12-US Specsheet

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Communication Systems | LBC 34xx/12 Horn Loudspeakers
LBC 34xx/12 Horn Loudspeakers
High efficiency drivers
Up to 45 W (max. power)
Wide opening angle
Excellent speech reproduction
Simple power setting
Water- and dust protected to IP 65
Versatile mounting bracket
Comply with international installation and safety
regulations
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.

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 quarter­power radiation (i.e. in 3 dB steps) can easily be selected by connecting the amplifier output to the appropriate tap. A two meter long 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.

System Overview

The LBC 3481/12 is a circular horn loudspeaker with 15 W (max power) which is made from ABS The LBC 3491/12 is a rectangular model with 15 W (max power) and is made from ABS. The 30 W (max power) LBC 3492/12 is a circular loudspeaker with a large horn measuring 354mm in diameter. It is made from a combination of aluminum with ABS for optimum strength and low weight. The edge of the horn is covered with a PVC profile for protection against impact damage. The 45 W (max power) LBC 3493/12 is a circular loudspeaker with a large horn measuring 400mm in diameter. It is made from a combination of aluminum with ABS for optimum strength and low weight. The edge of the horn is covered with PVC for protection against impact damage.

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
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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 EN 60065 Self-Extinguishing according to UL94V0

Installation/Configuration Notes

LBC 3481/12
Dimensions (in mm/inch)
Circuit diagram
Polar diagram (measured with pink noise)
Octave band (Hz)
SPL 1.1 - - 94 103 105 98 86 SPL max. - - 104 113 115 108 96 Q-factor - - 1.7 3.5 7.8 25.7 52.5 Efficiency - - 1.82 7.08 5.13 0.31 0.01 Hor. angle - - 180 160 95 50 30 Vert. angle - - 180 160 95 50 30
125 250 500 1k 2k 4k 8k
Quick reference table
LBC 3491/12
Frequency response
Dimensions (in mm/inch)
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Circuit diagram
Frequency response
LBC 34xx/12 Horn Loudspeakers | 3
Octave band (Hz)
SPL 1.1 - - 99 108 111 106 97 SPL max. - - 109 118 121 116 107 Q-factor - - 2.7 6.5 15.8 40.7 75.9 Efficiency - - 3.72 12.3 10 1.23 0.08 Hor. angle - - 180 90 55 40 30 Vert. angle - - 180 130 80 45 15
125 250 500 1k 2k 4k 8k
Quick reference table
Polar diagram vertical (measured with pink noise)
Polar diagram horizontal (measured with pink noise)
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LBC 3492/12
Dimensions (in mm/inch)
Circuit diagram
Frequency response
Polar diagram (measured with pink noise)
Octave band (Hz)
SPL 1.1 - 93 105 110 112 104 90 SPL max. - 106 118 123 125 117 103 Q-factor - 2.2 3.5 10.7 30.9 57.5 75.9 Efficiency - 1.15 11.22 11.75 6.46 0.55 0.02 H. angle - 180 145 80 45 35 30 V. angle - 180 145 80 45 35 30
125 250 500 1k 2k 4k 8k
Quick reference table
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LBC 3493/12
Dimensions (in mm/inch)
LBC 34xx/12 Horn Loudspeakers | 5
Circuit diagram
Frequency response
Polar diagram (measured with pink noise)
Octave band (Hz)
SPL 1.1 - 92 105 111 112 104 90 SPL max. - 107 120 126 127 119 105 Q-factor - 2.6 5.1 15.1 37.2 61.7 74.1 Efficiency - 0.78 7.76 10.47 5.37 0.41 0.02 H. angle - 180 120 70 45 40 30 V. angle - 180 120 70 45 40 30
125 250 500 1k 2k 4k 8k
Quick reference table

Parts Included

Quantity Components 1 LBC 34xx/12 Horn loudspeaker

Ordering Information

Model | Description LBC 3481/12 Horn Loudspeaker, Circular, 10 W LBC 3491/12 Horn Loudspeaker, Rectangular, 10 W LBC 3492/12 Horn Loudspeaker, Circular, 20 W LBC 3493/12 Horn Loudspeaker, Circular, 30 W Hardware Accessories LBC 1256/00 EVAC Connection Adapter
3-pole screw connector (100 pcs)
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LBC 34xx/12 Horn Loudspeakers

LBC 3481/12 LBC 3491/12 LBC 3492/12 LBC 3493/12 Electrical Max. Power 15 W 15 W 30 W 45 W Rated Power (PHC) 10 W
(10 - 5 - 2.5 W)
Sound Pressure Level at Rated Power/1 W (at 1 kHz, 1 m)
113 dB / 103 dB (SPL) 118 dB / 108 dB (SPL) 123 dB / 110 dB (SPL) 126 dB / 111 dB (SPL)
Effective Frequency
500Hz-7kHz 480Hz-5.5kHz 380Hz-5.5kHz 380Hz-5kHz
Range (-10 dB) Opening Angle
(1 kHz/4 kHz, -6 dB) Mechanical Horizontal 160° / 50° 90° / 40° 80° / 35° 70° / 40° Vertical 160° / 50° 130° / 45° 80° / 35° 70° / 40° Rated Voltage 100 V 100 V 100 V 100 V Rated Impedance 1000 ohm 1000 ohm 500 ohm 333 ohm Connection 4-wire cable
2 m long Dimensions aperture (LxW) - 267 x 171 mm
Aperture Dia. 156 mm
(6.14 inch)
Overall Length 184 mm
(7.24 inch) Color Light grey RAL 7035 Light grey RAL 7035 Light grey RAL 7035 Light grey RAL 7035 Weight 1.25 kg
(2.75 lb) Environmental Ambient Temperature -25°C to +55 °C -25°C to +55 °C -25°C to +55 °C -25°C to +55 °C
10 W
(10-5-2.5W )
4-wire cable
2 m long
10.51 x 6.73 inch
- 354 mm
276 mm
(10.87 inch)
1.4 kg
(3.08 lb)
20 W
(20-10-5 W)
4-wire cable
2 m long
- -
(13.94 inch)
332 mm
(13.07 inch)
2.65 kg
(5.83 lb)
30 W
(30-15-7.5 W)
4-wire cable
2 m long
400 mm
(15.75 inch)
353 mm
(13.90 inch)
3 kg
(6.6 lb)
Americas: Bosch Security Systems 130 Perinton Parkway Fairport, New York, 14450, USA Phone: +1 585 223 4060 Fax: +1 800 289 0096 security.sales@us.bosch.com www.boschsecurity.us
© Bosch Security Systems, 2005 | Data subject to change without notice | 12. Dec. 2005
Europe, Middle East, Africa: Bosch Security Systems B.V. P.O. Box 80002 5600 JB Eindhoven, The Netherlands Phone: +31 (0) 40 27 83955 Fax: +31 (0) 40 27 86668 emea.securitysystems@bosch.com www.boschsecurity.com
Asia-Pacific: Bosch Security Systems Pte Ltd 38C Jalan Pemimpin Singapore 577180 Phone: +65 6319 3450 Fax: +65 6319 3499 apr.securitysystems@bosch.com www.boschsecurity.com
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