Bosch LBC3483-00-US Specsheet

Communications Systems | Horn Loudspeaker 35W

LBC3483/00 Horn Loudspeaker 35W

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 3483/00 is a circular, 35 W horn loudspeaker,
measuring 490 mm (19.6 in) in diameter. It is made
from aluminum. The edges of the horn are covered
with a PVC profile for protection against impact
damage. It is light gray (RAL 7035), and is water and
dust protected.

Voice alarm loudspeaker

The LBC 3483/00 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 EN 54‑24 certified

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

SPL(dB)

31.5

63

125

250

500

1000

Frequency (Hz)

2k

4k

8k 16k

10dB

90

250 Hz

500 Hz

1000 Hz

2000 Hz
4000 Hz
8000 Hz

120˚120˚

150˚

150˚

180˚180˚

90˚90˚

60˚60˚

30˚30˚

0˚0˚

0

0

-10

-10

-20

-20

2 | Horn Loudspeaker 35W

Safety acc. to EN 60065

Water and dust protection acc. to IEC 60529, IP 65

Emergency acc. to EN 54‑24 / BS 5839‑8 /

EN 60849

Wind‑force acc. to NEN 6702: 2007 + A1: 2008,

Bft11

Region Certification

Europe CE

CE DOC (IP)

CPD

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

Polar diagram (measured in pink noise)

Octave band sensitivity *

Octave SPL

1W/1m

Total octave
SPL
1W/1m

125 Hz 74.0 - -

250 Hz 91.7 - -

500 Hz 102.5 - -

1000 Hz 111.3 - -

2000 Hz 106.5

Total octave
SPL
Pmax/1m

| Horn Loudspeaker 35W

3

4000 Hz 99.9 - -

8000 Hz 92.6 - -

A-weighted - 103.5 117.1

Lin-weighted - 103.4 115.6

Octave band opening angles

Horizontal Vertical

125 Hz - -

250 Hz 179 179

500 Hz 93 93

1000 Hz 55 55

2000 Hz 37 37

4000 Hz 26 26

8000 Hz 15 15

Acoustical performance specified per octave

• (all measurements are done with a pink noise signal;
the valuals are in dBSPL)

Effective frequency range (-10
dB)

Opening angle
at 1 kHz/4 kHz (-6 dB)

Rated voltage
Rated impedance

Connector Screw terminal block

380 Hz to 5 kHz

50° / 25°

100 V

35 W 285 Ohm

17.5 W 571 Ohm

8.75 W 1142 Ohm

* Technical performance data acc. to IEC 60268-5

Mechanical

Dimensions (L x Dmax) 499 x 490 mm (20 x 19.6 in)

Weight 4.5 kg (9.9 lb)

Color Light gray (RAL 7035)

Cable diameter 6 mm to 12 mm

(0.24 in to 0.47 in)

Environmental

Operating temperature -25 ºC to +55 ºC (-13 ºF to

+131 ºF)

Specified active equalization, required for EN54‑24

Parts included

Quantity Component

1 LBC 3483/00 Horn Loudspeaker

1 PG 13.5 cable gland (fitted)

Technical specifications

Electrical*

Maximum power 52.5 W

Rated power 35 / 17.5 / 8.75 W

Storage and transport
temperature

Relative humidity <95%

-40 ºC to +70 ºC (-40 ºF to
+158 ºF)

Note:

• The specification data is measured in an anechoic
chamber, free field

• The reference axis is perpendicular to the center
point of the front grille

• The reference plane is perpendicular to the center of
the reference axis

• The horizontal plane is perpendicular to the center of
the reference plane

Sound pressure level
at 35 W / 1 W (1 kHz, 1 m)

Sound pressure level
at 35 W / 1 W (1 kHz, 4 m)

127 dB / 112 dB (SPL)

115 dB / 100 dB (SPL)

CE-label

4 | Horn Loudspeaker 35W

Represented by:

Europe, Middle East, Africa: Germany: North America: Asia-Pacific:

Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
[e-mail]
emea.boschsecurity.com

Bosch Sicherheitssysteme GmbH
Robert-Bosch-Ring 5
85630 Grasbrunn
Germany
www.boschsecurity.com

Bosch Security Systems, Inc.
130 Perinton Parkway
Fairport, New York, 14450, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.us

Robert Bosch (SEA) Pte Ltd, Security Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.asia

© Bosch Security Systems 2017 | Data subject to change without notice
1933765259 | en, V11, 16. May 2017

Ordering information

Horn Loudspeaker 35W

Horn loudspeaker 35 W, circular 20", aluminum/ABS
material, U-bracket mounting, water and dust
protected IP65, EN54-24 certified, light gray RAL 7035.

Order number LBC3483/00

Accessories

DRIVER UNIT 25W (EVAC)

Horn driver 25 W, for use with LBC3478/00 (14") or
LBC3479/00 (20") horns, light gray RAL 7035.

Order number LBC3472/00

DRIVER UNIT 35W (EVAC)

Horn driver 35 W, for use with LBC3478/00 (14") or
LBC3479/00 (20") horns, light gray RAL 7035.

Order number LBC3473/00

Horn driver assembly, 50W

Horn driver 50 W, for use with LBC3478/00 (14") or
LBC3479/00 (20") horns, light gray RAL 7035.

Order number LBC3474/00

LBC 3478/00 Horn, 14" without Driver

Horn 14” without driver, aluminum material, for use
with horn drivers LBC3472/00 (25 W), LBC3473/00
(35 W), and LBC3474/00 (50 W), light gray RAL 7035.

Order number LBC 3478/00

Horn, 20", assembly part

Horn 20” without driver, aluminum material, for use
with horn drivers LBC3472/00 (25 W), LBC3473/00
(35 W), and LBC3474/00 (50 W), light gray RAL 7035.

Order number LBC3479/00