Bosch LS1-UC20E User Manual
Communication Systems | LS1-UC20E Pendant Sphere Loudspeaker
LS1-UC20E Pendant Sphere Loudspeaker
Superb speech and music reproduction
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Wide sound spread
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Ease of installation
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Modern unobtrusive styling
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Tough, impact-resistant enclosure
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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 part 8 compliant
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The LS1-UC20E 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 loudspeaker are specifically designed for
use in buildings where performance of systems for
verbal communication announcements is governed by
regulations. The LS1-UC20E is designed for use in voice
alarm systems and is compliant with Britsh Standard BS
5839 part 8.
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
Quality Assurance
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 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 Protected acc. to IEC 60529 IP 65
www.boschsecurity.com
2 | LS1-UC20E Pendant Sphere Loudspeaker
Installation/Configuration Notes
Mounting
The loudspeaker is suspended from the ceiling via its 5
m , 4-core connecting cable, which can easy to shorten
for desired height. For optional safety, provision is made
to attach a steel safety cord if required.
Power Setting
The loudspeaker is supplied with a 5 m color coded four-
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 or quarterpower radiation to be selected (i.e. in 3 dB steps).
Polar diagram (measured with pink noise)
Dimensions in mm
Circuit diagram
Parts Included
Quantity Component
1 LS1-UC20E Pendant Sphere Loudspeaker
Frequency response
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