Bosch LBC 3950/01 User Manual
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 fullpower, 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
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Very wide opening angle
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Modern unobtrusive styling
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Installation friendly
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Splash-waterproof
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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 loopthrough 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.
u
v
w
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
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