Bosch LS1-UC20E-1-US Specsheet

Communications Systems | LS1‑UC20E‑1 Pendant Sphere Loudspeaker

LS1‑UC20E‑1 Pendant Sphere Loudspeaker

www.boschsecurity.com

u Superb speech and music reproduction

u 5 m connection cable

u Provision for optional safety cord

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 EN 54‑24 certified and
compliant with 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

u Water and dust protected to IP 65

u EN 54‑24 certified

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 has 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.

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

2 | LS1‑UC20E‑1 Pendant Sphere Loudspeaker

Safety Aspects

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

Water and dust protection according to IEC 60529, IP 65

Emergency according to EN 54‑24 / BS 5839‑8 /

EN 60849

Region Certification

Europe CE

CE DOP

CPD

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 color­coded, 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).

Frequency response

Polar diagram (measured with pink noise)

Octave band sensitivity*

Octave SPL

1W/1m

Total octave
SPL
1W/1m

Total octave
SPL
Pmax/1m

Dimensions in mm / (in)

Circuit diagram

125 Hz 84.1 - -

250 Hz 84.7 - -

500 Hz 84.3 - -

1000 Hz 85.3 - -

2000 Hz 88.3 - -

4000 Hz 90.7 - -

8000 Hz 90.7 - -

A-weighted - 87.4 99.3

Lin-weighted - 89.4 101.0

Octave band opening angles

Horizontal Vertical

125 Hz 360 360

250 Hz 360 360

500 Hz 360 360

3 | LS1‑UC20E‑1 Pendant Sphere Loudspeaker

1000 Hz 220 220

2000 Hz 122 122

4000 Hz 65 65

8000 Hz 37 37

Acoustical performance specified per octave * (all
measurements are done with a pink noise signal; the
values are in dBSPL).

Parts included

Quantity Components

1 LS1‑UC20E‑1 Pendant Sphere Loudspeaker

1 Cable clamp

Technical specifications

Electrical*

Maximum power 30 W

Rated power 20 / 10 / 5 / 2.5 W

Sound pressure level
at 20 W / 1 W (1kHz, 1 m)

Sound pressure level
at 20 W /1 W (1kHz, 4 m)

Opening angle
at 1 kHz / 4 kHz (-6 dB)

99 dB / 86 dB (SPL)

91 dB / 78 dB (SPL)

220° / 65°

Environmental

Operating temperature -25 ºC to +55 ºC

(-13 ºF to +131 ºF)

Storage and transport
temperature

Relative humidity <95%

-40 ºC to +70 ºC
(-40 ºF to +158 ºF)

CE-label

Note:

• The specification data is measured in an anechoic
chamber, free field

• The reference axis is perpendicular to the center
point of the front grille

• The reference plane is perpendicular to the center of
the reference axis

• The horizontal plane is perpendicular to the center of
the reference plane

Effective frequency range (-10
dB)

Rated voltage
Rated impedance

Connector 3‑pole screw terminal

80 Hz to 20 kHz

100 V

20 W 500 Ohm

10 W 1000 Ohm

5 W 2000 Ohm

2. 5 W 4000 Ohm

* Technical performance data acc. to IEC 60268-5

Mechanical

Dimensions (D x L) 185 x 254 mm (7.3 x 10 in)

Weight 3 kg (6.6 lb)

Color White (RAL 9010)

Material ABS

Ordering information

LS1‑UC20E‑1 Pendant Sphere Loudspeaker

Pendant sphere loudspeaker, 20 W, white ABS
enclosure with metal grille, fixed 5 m, 5-core
connection cable and cable suspension clamp,
EN54-24 certified, white RAL 9010.

Order number LS1-UC20E-1

4 | LS1‑UC20E‑1 Pendant Sphere Loudspeaker

Represented by:

Europe, Middle East, Africa: Germany: North America: Asia-Pacific:

Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
[e-mail]
emea.boschsecurity.com

Bosch Sicherheitssysteme GmbH
Robert-Bosch-Ring 5
85630 Grasbrunn
Germany
www.boschsecurity.com

Bosch Security Systems, Inc.
130 Perinton Parkway
Fairport, New York, 14450, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.us

Robert Bosch (SEA) Pte Ltd, Security Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.asia

© Bosch Security Systems 2016 | Data subject to change without notice
1929873675 | en, V10, 21. Dec 2016