Bosch F.01U.506.041, F.01U.506.043 Datasheet

Communications 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.

System Overview

The LBC 3481/12 is a circular horn loudspeaker, and the
LBC 3491/12 is a rectangular model. Both are 10 W, and
are made from ABS.

The LBC 3492/12 is a circular, 20 W horn loudspeaker
with a large horn measuring 354 mm 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 LBC 3493/12 is a circular, 30 W horn loudspeaker
with a large horn measuring 400 mm 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.

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

www.boschsecurity.com

2 | LBC 34xx/12 Horn Loudspeakers

extreme conditions, leading to higher customer
satisfaction, longer operating life, and much less chance
of failure or performance deterioration.

Region Certification

Europe CE Declaration of Conformity

Safety acc. to EN 60065

Self-extinguishing acc. to UL 94 V0

Water and dust protection acc. to EN 60529‑IP65

Installation/Configuration Notes

LBC 3481/12

Frequency response

Dimensions in mm (in)

Circuit diagram

Polar diagram (measured with pink noise)

125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 8 kHz

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

H. angle - - 180 160 95 50 30

V. angle - - 180 160 95 50 30

Acoustical performance specified per octave