Bosch LBC3941-11 Specsheet
Communications Systems | Sound projector, 6W
LBC3941/11 Sound projector, 6W
www.boschsecurity.com
u Excellent speech and music reproduction
u Very wide opening angle
u Modern unobtrusive styling
The LBC 3941/11 is a 6 W cost-effective sound
projector. It features a very wide opening angle and
unobtrusive styling. Water and dust protection to IP 65
make it suitable for indoor and outdoor use.
Functions
The sound projector features a very wide opening
angle (90 degrees) which means fewer units are
required to cover a given area. Its wide frequency
range also results in better speech and music
reproduction, while the directivity ensures that the
sound is accurately projected to where it is needed
most.
The LBC 3941/11 sound projector is finished in an
attractive white color, and its unobtrusive appearance
complements today’s interior lighting. The color and
styling of the front grille matches an existing Bosch
ceiling loudspeaker (LBC 3951/11).
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
u Simple power setting
u Water and dust protected according to IP65
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.
The enclosures are made from high-impact selfextinguishing ABS (according to class UL 94 V0).
Safety acc. to EN 60065
Water and dust protection acc. to EN 60529, IP 65
Self-Extinguishing acc. to UL 94 V0
Region Regulatory compliance/quality marks
Europe CE
Installation/configuration notes
The sound projector is supplied with an aluminium
mounting bracket painted in white. The bracket has
three 10 mm holes, which can be used to easily mount
the projector to walls and ceilings. The direction of the
projector can be adjusted by means of two screws
covered with white plastic covers. The unit is supplied
with a 2 m color-coded five-core cable, with each color
connected to a different primary tap on the matching
4 Ω
2 | Sound projector, 6W
transformer. This makes it easy to select full-power,
half-power, quarter-power and eighth-power radiation
without opening the unit during installation.
Circuit diagram
Polar diagram (measured with pink noise)
Dimensions in mm (in)
Frequency response
125Hz250Hz500Hz1
kHz2kHz4kHz8kHz
SPL
1.1
SPL
max.
Qfacto
r
Effici
ency
H.
angl
e
V.
angl
e
82 84 83 88 92 88 88
90 92 91 96 100 96 96
1.2 1.2 1.6 2.9 5.1 8.5 18
0.17 0.26 0.16 0.28 0.39 0.09 0.04
360 360 360 180 120 90 60
360 360 360 180 120 90 60
Acoustical performance specified per octave
Parts included
Quantity Component
1 LBC 3941/11 Sound Projector
Technical specifications
Electrical*
Maximum power 9 W
Rated power 6 / 3 / 1.5 / 0.75 W
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