Bosch F.01U.081.415 Datasheet

Communications Systems | LS1‑UC20E‑1 Pendant Sphere Loudspeaker

LS1‑UC20E‑1 Pendant Sphere
Loudspeaker

Superb speech and music reproduction

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5 m connection cable

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Provision for optional safety cord

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Water and dust protected to IP 65

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BS 5839‑8 and EN 60849 compliant

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Sound spheres are pendant sound projectors designed to
be suspended from the ceiling by their connecting cables.
Their excellent sound spread makes them ideal for use in
buildings with high ceilings, such as hypermarkets and
superstores.

The LS1‑UC20E‑1 is a powerful 20 W pendant sphere
loudspeaker, intended for high quality speech and music
reproduction. The state‑of‑the‑art design is matched to
both modern and traditional style environments. The
loudspeaker is suitable for use in voice evacuation
systems.

Functions

Voice Alarm Loudspeaker

Voice alarm loudspeakers are specifically designed for use
in buildings where performance of systems for verbal
communication announcements is governed by
regulations. The LS1‑UC20E‑1 is designed for use in voice
alarm systems and is compliant with British Standard
BS 5839‑8 and EN 60849.

The loudspeaker has built‑in protection to ensure that, in
the event of a fire, damage to the loudspeaker does not
result in failure of the circuit to which it is connected. In
this way, system integrity is maintained; ensuring
loudspeakers in other areas can still be used to inform
people of the situation. The loudspeaker is supplied with
a ceramic terminal block and thermal fuse.

Superb Sound Quality

The use of a high‑quality driver in combination with
advanced filtering, have resulted in a very natural sound
reproduction with excellent bass response.

Certifications and Approvals

All Bosch loudspeakers are designed to withstand
operating at their rated power for 100 continuous 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 improved reliability under
extreme conditions, leading to higher customer
satisfaction, longer operating life, and lessons the chance
of failure or performance deterioration.

www.boschsecurity.com

2 | LS1‑UC20E‑1 Pendant Sphere Loudspeaker

Ø 185 56

254

14

16

41

1.4

3 x 6 (0.24)

Ø

(0.55)

(1.61)

(7.28) (2.20)

(10.00)

(1.61)

(0.63)

0

20W

10W

5W

2.5W

8

Safety Aspects

In common with all Bosch products, care is taken to meet
high safety standards. All ABS parts are self-extinguishing
(according to UL 94 V 0). This sound projector complies
with the relevant safety and installation regulations of
EN 60065.

Region Certification

Europe CE

Water and dust protection according to IEC 60529, IP 65

Emergency according to BS 5839‑8 / EN 60849

Installation/Configuration Notes

Mounting

The loudspeaker is suspended from the ceiling via its
five meter, five‑core connecting cable, which is easy to
shorten for the desired height. For optional safety, a steel
safety cord can be attached.

Power Setting

The loudspeaker is supplied with a five meter color-coded,
five‑core connecting cable with each color connected to a
different primary tap on the 100 V matching transformer.
This allows nominal full‑power, half‑power, quarter‑power
or eighth‑power radiation to be selected (in 3 dB steps).

Circuit diagram

Frequency response

Dimensions in mm / (in)

Polar diagram (measured with pink noise)

Octave band sensitivity*

Octave SPL
1W/1m

Total octave SPL
1W/1m

Total octave SPL
Pmax/1m

125 Hz 84.1 - -

250 Hz 84.7 - -

500 Hz 84.3 - -

1000 Hz 85.3 - -

2000 Hz 88.3 - -