Bosch LBC 3950/01 Bedienungsanleitung

Communications Systems | LBC 3950/01 Ceiling Loudspeaker

The LBC 3950/01 is a compact, 6 W loudspeaker with a

circular plastic grille. It has excellent audio performance

and is easy to install with its integral mounting clips. The

loudspeaker is IPx4 water protected from the front so it

can be installed in humid environments.

Functions

The LBC 3950/01 has a circular pattern plastic grille with

a plastic surround, finished in an attractive off-white

RAL color. The unobtrusive styling of this loudspeaker

complements modern interior lighting.

The loudspeaker feature a very wide opening angle, which

means fewer units are required to cover a given area. The

wide frequency range means better speech and music

reproduction. The unit is supplied with a 100 V matching

transformer with taps on the primary winding for full-

power, half-power, quarter-power and eighth-power

radiation.

The loudspeaker (with special treated paper cone), is IP 4

water protected from the front and can be applied in

humidity environments for example bathrooms, saunas,

atriums and swimming pool areas.

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 operating life, and much less chance

of failure or performance deterioration.

All plastic parts are manufactured from self-extinguishing

high-impact ABS material (according to UL 94V0).

Region Certification

Europe CE Declaration of Conformity

Safety acc. to EN 60065

Water protected acc. to EN 60529, IPx4

LBC 3950/01 Ceiling Loudspeaker

▶Compact yet powerful

▶Very wide opening angle

▶Modern unobtrusive styling

▶Installation friendly

▶Splash-waterproof

▶Comply with international installation and safety

regulations

www.boschsecurity.com

2 | LBC 3950/01 Ceiling Loudspeaker

Installation/Configuration Notes

Installation is easy with integral clips that securely hold

the ceiling loudspeaker in its cut-out. Ceilings from 9 to

25 mm thick can be accommodated. A template is also

provided for accurately marking the cutout in ceiling

panels. Wiring is via a connection block with push-type

terminals, making installation possible without using any

special tools. The terminal blocks have provision for loop-

through wiring. The transformer is delivered wired for 6 W

rated output power, but can easily be changed for other

connections using the color-coded wires and terminal

block.

01 Clamp

02 Matching transformer

03 Terminal block

Dimensions in mm (in)

Circuit diagram

Frequency response

Polar diagram

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

SPL 1.1 87 88 86 88 89 91 89

SPL max. 95 96 94 96 97 99 97

Q-factor 4 5.6 2.6 3 3.8 8.1 15

Efficiency 0.16 0.14 0.19 0.27 0.26 0.19 0.06

H. angle 180 180 180 170 165 90 55

V. angle 180 180 180 170 165 90 55

Acoustical performance specified per octave

LBC 3950/01 Ceiling Loudspeaker | 3

Technical Specifications

Electrical*

Maximum power 9 W

Rated power 6 / 3 / 1.5 / 0.75 W

Sound pressure level

at 6 W / 1 W (1 kHz, 1 m)

96 dB / 88 dB (SPL)

Sound pressure level

at 6 W / 1 W (4 kHz, 1 m)

99 dB / 91 dB (SPL)

Effective frequency range

(-10 dB)

60 Hz to 18 kHz

Opening angle

at 1 kHz/4 kHz (-6 dB)

170° / 90°

Rated voltage 100 V

Rated impedance 1667 ohm

Connector 2-pole push-in terminal block

* Technical performance data acc. to IEC 60268-5

Mechanical

Diameter 160 mm (6.30 in)

Maximum depth 95 mm (3.74 in)

Ceiling thickness 9 to 25 mm (0.35 to 0.98 in)

Mounting cut-out 145 mm (5.71 in)

Speaker diameter 101.6 mm (4 in)

Weight 690 g (1.52 lb)

Color Off-white (RAL 9010)

Magnet weight 101 g (3.57 oz)

Environmental

Operating temperature -25 ºC to +55 ºC (-13 ºF to +131 ºF)

Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)

Relative humidity <95%

Ordering Information

LBC 3950/01 Ceiling Loudspeaker

6 W, with a circular plastic grille.

LBC3950/01

Accessories

LBC 1256/00 EVAC Connection Adapter

3-pole screw connector, 100 pieces

LBC1256/00

www.boschsecurity.com

4 | LBC 3950/01 Ceiling Loudspeaker

Americas:

Bosch Communications Systems

12000 Portland Avenue South

Burnsville, Minnesota 55337, USA

Phone: +1-800-392-3497

Fax: +1-800-955-6831

[email protected]

www.boschsecurity.com

Europe, Middle East, Africa:

Bosch Security Systems B.V.

P.O. Box 80002

5600 JB Eindhoven, The Netherlands

Phone: + 31 40 2577 284

Fax: +31 40 2577 330

[email protected]

www.boschsecurity.com

Asia-Pacific:

Robert Bosch (SEA) Pte Ltd

11 Bishan Street 21

Singapore 573943

Phone: +65 6571 2600

Fax: +65 6571 2698

[email protected]

www.boschsecurity.com

Represented by

T870128523 | Cur: en-US, V24, 27 Jan 2011

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