This document provides specifications for several Bosch loudspeaker models: - The LBC 3510/40, 3520/40, and 3530/40 are circular loudspeaker units that produce sound levels between 90-105 dB and have effective frequency ranges from 60 Hz to 20 kHz. They require 100V power and have power ratings between 1.5 to 24W. - Accessories include circular grilles, surface mounting boxes, back boxes, and fire domes for housing and protecting the loudspeaker units. - All components have specifications for dimensions, weight, construction materials, safety ratings and electrical connections.

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1 4 7
1/4 1/2 1
POWER SETTING
1 1/2 1/4
LBC 3510/40 6W 3W 1.5 W
LBC 3520/40 12 W 6W 3W
2 LBC 3530/40 24 W 12 W 6W
8
COMMON
5
PHASE
PHASE COMMON
3 1/4 1/2 1
POWER SETTING
9 Max 240 W branch power
6 1
2
50 mm max.
Max 240 W branch power
10 12
UP
2
‘CLICK’
UP
LBC 3603/01 1
11
LBC 3665/00 LBC 3660/01
13
x6
LBC 3650/00
14
Line/Loudspeaker
Supervision boards
LBB 4441
LBB 4442
LBB 4443

2. Data subject to change without notice.
3922 988 54312 26-03 © Bosch Security Systems 2003
LBC 3665/00
LBC 3660/01
LBC 3650/00
LBC 3603/01
LBC 3530/40
LBC 3520/40
EN LBC 3510/40
Instructions for use
LBC 3603/01 LBC 3603/01
LBC 3660/01
(12 W)
LBC 3520/40
(24 W) (6 W)
LBC 3530/40 LBC 3510/40
LBC 3665/00
LBC 3650/00
Loudspeakers
TECHNICAL PERFORMANCE DATA ACC. TO IEC 268-5
Loudspeaker units LBC 3510/40 LBC 3520/40 LBC 3530/40
Max. power 9W 18 W 36 W
Rated power 6 W (6 - 3 - 1.5 W) 12 W (12 - 6 - 3 W) 24 W (24 - 12 - 6 W)
Sound pressure level at rated power/1 W 98 dB/90 dB (SPL) 101 dB/90 dB (SPL) 105 dB/91 dB (SPL)
(at 1 kHz, 1 m)
Effective frequency range (-10 dB) 60 Hz to 20 kHz 60 Hz to 20 kHz 60 Hz to 20 kHz
Opening angle (at 1 kHz/4 kHz, -6 dB) 150°/120° 150°/120° 145°/130°
Rated voltage 100 V 100 V 100 V
Rated impedance 1666 Ω 833 Ω 416 Ω
Ambient temperature range -25 to +55 °C (14 to 131 °F) -25 to +55 °C (14 to 131 °F) -25 to +55 °C (14 to 131 °F)
Safety acc. to EN 60065 acc. to EN 60065 acc. to EN 60065
Connections Screw-terminal block Screw-terminal block Screw-terminal block
Dimensions (dia. x max. D) 292 x 98 mm 292 x 98 mm 292 x 182.5 mm
(11.5 x 3.9 in) (11.5 x 3.9 in) (11.5 x 7.2 in)
Mounting hole dia. 255 mm (10.03 in) 255 mm (10.03 in) 255 mm (10.03 in)
Max. ceiling thickness 50 mm (1.97 in) 50 mm (1.97 in) 50 mm (1.97 in)
Weight 1.2 kg (2.64 lb) 1.6 kg (3.52 lb) 2.6 kg (5.72 lb)
Grille LBC 3603/01
Description Circular wave guide (metal)
Dimensions (dia. x max. D) 300 x 50 mm
(11.8 x 2.0 in)
Colour RAL 9010 (white)
Weight 440 g (0.96 lb)
Surface-mounting box/Back box LBC 3660/01 LBC 3665/00
Description Surface-mounting box Back Box
Dimensions (dia. x max. D) 300 x 117.3 mm 251 x 116 mm
(11.8 x 4.6 in) (9.9 x 4.6 in)
Colour RAL 9010 (white) Black
Weight 830 g (1.93 lb) 550 g (1.21 lb)
Fire dome LBC 3650/00
Description Metal fire dome
Dimensions (dia. x max. D) 360 x 112 mm 1
(14.2 x 4.4 in) Com
LBC 3510/40 LBC 3520/40 LBC 3530/40
Weight 2 kg (4.4 lb) Phase 1/2
1 = 6W 12 W 24 W
1/4 1/2 = 3 W 6W 12 W
4Ω
1/3 = 1.5 W 3W 6W
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