Bosch LBC3484-00-US Specsheet
Communications Systems | LBC 3484/00 Horn Loudspeaker
LBC 3484/00 Horn Loudspeaker
www.boschsecurity.com
u High efficiency driver
u Excellent speech reproduction
u Provision for inside mounting of the optional line/
loudspeaker supervision board
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.
The LBC 3484/00 is a circular 50 W horn loudspeaker,
measuring 490 mm (19.6 in) in diameter. They are
made from aluminum. The edges of the horns are
covered with a PVC profile for protection against
impact damage. They are light grey (RAL 7035), and
are water and dust protected.
Voice alarm loudspeaker
The LBC 3484/00 is designed for use in voice alarm
systems and is compliant with emergency standards.
The Horn loudspeaker has built-in protection to ensure
that, in the event of a fire, damage to the loudspeaker
does not result in failure of the circuit to which it is
connected. In this way, system integrity is maintained;
ensuring loudspeakers in other areas can still be used
to inform people of the situation. The Horn
loudspeaker has a ceramic terminal block, thermal
fuse and heat resistant, high-temperature wiring.
They have provision for inside mounting the optional
line/loudspeaker supervision boards.
u Water-and dust protected to IP 65
u BS 5839‑8 and EN 60849 compliant
Functions
The rear cover on the horn is made from selfextinguishing ABS (acc. to class UL 94 V0). The
connection cable is fed out through a cable gland
(PG 13.5) in rear cover. For loop through connection,
the rear cover is fitted with a second hole (covered as
standard supplied).
These integrated horns are also available as separate
horn and driver, allowing installing any combination of
horn and driver. See order information for the type
numbers.
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 operation life, and
much less chance of failure or performance
deterioration.
mm
in
37
1.45
204.0
8.0
102.0
4.0
51.0
2.0
37.0
1.45
18.5
0.73
10.8 x 3.0
0.43 x 0.12
51.0
2.0
3.0
0.12
mm
in
0
1
1/2
16 Ω
1/4
1k
20k
2 | LBC 3484/00 Horn Loudspeaker
Safety acc. to EN 60065
Water and dust protection acc. to IEC 60529, IP 65
Emergency acc. to BS 5839‑8 / EN 60849
Wind‑force acc. to NEN 6702: 2007 + A1: 2008,
Bft11
Region Certification
Europe CE
Installation/configuration notes
Simple Power Setting
The horn has a three-way terminal block with screw
connection (including earth). Three primary taps are
provided on the matching transformer to allow
selection of nominal full-power, half-power or quarterpower radiation (in 3 dB steps).
Mounting
The horn loudspeakers are supplied complete with
sturdy adjustable steel mounting brackets, allowing
the sound beam to be accurately directed.
Circuit diagram
Frequency response
Dimensions in mm (in)
Bracket dimensions in mm (in)
Polar diagram (measured in pink noise)
Octave band sensitivity *
Octave SPL
1W/1m
Total octave
SPL
1W/1m
Total octave
SPL
Pmax/1m
125 Hz 84.3 - -
250 Hz 99.0 - -
500 Hz 105.2 - -
1000 Hz 111.0 - -
2000 Hz 106.2
4000 Hz 99.2 - -
8000 Hz 91.2 - -
A-weighted - 103.3 117.7
Lin-weighted - 103.5 116.3
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