Bosch F.01U.141.638 Datasheet

Communications Systems | LA1‑UMx0E Metal Column Loudspeakers

LA1‑UMx0E Metal Column Loudspeakers

Good speech intelligibility and background music

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reproduction

For applications where directivity is important

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Slim-line weatherproof design

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Swivel wall mounting bracket supplied as standard

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Robust aluminum construction

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Switchable between 100 V line and 8 Ohms

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Provision for inside mounting of the optional line/

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loudspeaker supervision board

Recommended for voice evacuation systems

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The LA1‑UM20E and LA1‑UM40E metal column
loudspeakers deliver professional performance from a
robust, yet aesthetically designed aluminum enclosure in a
white finish.

It is an ideal loudspeaker column where sound beaming is
required, for both indoor and outdoor use in passenger
terminals, places of worship, conference venues, theme
parks, swimming pools, factories, exhibition areas.

A swivel wall mounting bracket is supplied as standard,
allowing accurate positioning.

Functions

Voice alarm

Voice alarm loudspeakers are specifically designed for use
in applications, where the performance of PA systems is
subject to official regulations. The LA1‑UM20E and
LA1‑UM40E are designed for voice alarm systems, and are
compliant with British Standard BS 5839‑8 and EN 60849.

Protection

Both loudspeaker columns have built‑in protection to
ensure that in the event of a fire damage does not cause
failure of the connected circuit. In this way, system
integrity is maintained; ensuring loudspeakers in other
areas can still be used to inform people of the situation.

Connections and safety

The loudspeaker columns have a ceramic terminal block,
thermal fuse, and heat-resistant, high-temperature wiring.
The column has a provision for internally mounting the
optional line/loudspeaker supervision board.

Loudspeaker output power setting

Four primary taps are provided on the built‑in matching
transformer. Loudspeaker output power setting is done
on the build-in transformer and connected to a rotary
vary‑tap switch located in the back of the enclosure to
allow simple output power setting. An 8 ohms setting and
switch‑off position is also provided on the rotary vary‑tap
switch.

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 the speakers can withstand two times their rated
power for short durations. This ensures extra reliability
under extreme conditions, leading to greater customer
satisfaction, longer operating life, and much less chance
of failure or performance deterioration.

www.boschsecurity.com

2 | LA1‑UMx0E Metal Column Loudspeakers

450mm

17.7"

96mm

3.8"

84mm

3.3"

100mm

3.94"

750mm

29.5"

96mm

3.8"

84mm

3.3"

100mm

3.94"

Safety acc. to EN 60065

Emergency acc. to BS 5839‑8

acc. to EN 60849

Water and dust protection acc. to EN 60529 IP 65

Installation/Configuration Notes

The column loudspeakers can be wall mounted using the
swivel wall bracket standard supplied, or directly onto a
floor stand LBC 1259/00 with an M10 threaded bolt
without additional accessories. The bracket is attached on
a slider, which can be placed and secured in any desired
position along the rear of the enclosure.

Standard supplied with 2 m connection cable, but these
can be replaced during installation with any other type of
connection cable.

The connection cable is fed out through a cable gland (PG

20) in the top rear of the enclosure. For loop through
connection, a second hole (covered as standard supplied)
is provided.

LA1-UM20E Dimensions mm (in)

LA1-UM40E Dimensions mm (in)