Bosch LBC3951-11-US Specsheet

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Communications Systems | LBC 3951/11 Ceiling Loudspeaker
LBC 3951/11 Ceiling Loudspeaker
www.boschsecurity.com
u Compact yet powerful
u Very wide opening angle
u Modern unobtrusive styling
The LBC 3951/11 is a compact, 6 W loudspeaker with a perforated metal 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 3951/11 has a perforated metal grille with a plastic surround, finished in an attractive off-white RAL color. The unobtrusive styling of this loudspeaker complements today’s 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 IPx4 water protected from the front and can be applied in humidity environments for example bathrooms, saunas, atriums and swimming pool areas.
u Splash - waterproof
Certifications and approvals
All plastic parts are manufactured from self­extinguishing high-impact ABS material (according to UL 94V0). 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.
Safety acc. to EN 60065
Water protected acc. to EN 60529, IPx4
Region Certification
Europe CE
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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.
Frequency response
01Clamp
02Matching transformer
03Terminal block
Dimensions in mm (inch)
Circuit diagram
Polar diagram
125Hz250Hz500Hz1
kHz2kHz4kHz8kH
z
SPL 1.1 87 87 85 88 89 89 86
SPL max. 95 95 93 96 97 97 94
Q-factor 4 5.6 2.2 3.2 4.6 10.719
Efficiency0.16 0.110.180.250.220.090.
03
H. angle 180 180 180 170 160 80 60
V. angle 180 180 180 170 160 80 60
Acoustical performance specified per octave
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)
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Represented by:
Americas: Europe, Middle East, Africa: Asia-Pacific: China: America Latina:
Bosch Security Systems, Inc. 12000 Portland Avenue South Burnsville MN 55337, USA Phone: +1-800-392-3497 Fax: +1-800-955-6831 audiosupport@us.bosch.com www.boschsecurity.com
Bosch Security Systems B.V. P.O. Box 80002 5617 BA Eindhoven, The Netherlands Phone: + 31 40 2577 284 Fax: +31 40 2577 330 emea.securitysystems@bosch.com www.boschsecurity.com
Robert Bosch (SEA) Pte Ltd, Security Systems 11 Bishan Street 21 Singapore 573943 Phone: +65 6571 2808 Fax: +65 6571 2699 apr.securitysystems@bosch.com www.boschsecurity.asia
Bosch (Shanghai) Security Systems Ltd. 201 Building, No. 333 Fuquan Road North IBP Changning District, Shanghai 200335 China Phone +86 21 22181111 Fax: +86 21 22182398 www.boschsecurity.com.cn
Robert Bosch Ltda Security Systems Division Via Anhanguera, Km 98 CEP 13065-900 Campinas, Sao Paulo, Brazil Phone: +55 19 2103 2860 Fax: +55 19 2103 2862 latam.boschsecurity@bosch.com www.boschsecurity.com
© Bosch Security Systems 2015 | Data subject to change without notice 1919611531 | en, V7, 01. Jul 2015
Sound pressure level
99 dB / 91 dB (SPL)
at 6 W / 1 W (4 kHz, 1 m)
Effective frequency range
60 Hz to 18 kHz
(-10 dB)
Opening angle
170° / 80°
at 1 kHz/4 kHz (-6 dB)
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 inch)
Maximum depth 95 mm (3.74 inch)
Ceiling thickness 9 to 25 mm (0.35 to 0.98 inch)
Mounting cut-out 145 mm (5.71 inch)
Speaker diameter 101.6 mm (4 in)
Weight 690 g (1.52 lb)
Color 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 3951/11 Ceiling Loudspeaker
Ceiling loudspeaker 6 W, circular metal grille with an ABS surround, integral clips for easy mounting, push terminal block, white RAL 9010.
Order number LBC3951/11
Accessories
LBC 1256/00 EVAC Connection Adapter
Emergency connection adapter, 3-pole screw ceramic connector with a pre-mounted thermal fuse, to be installed in series with the 100 V primary connection of a loudspeaker unit, set of 100 pieces.
Order number LBC1256/00
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