Bosch LA1-UM40E-1, LA1-UM20E-1 Specsheet
Communications Systems | LA1‑UMx0E‑1 Metal Column Loudspeakers
LA1‑UMx0E‑1 Metal Column Loudspeakers
www.boschsecurity.com
u Good speech intelligibility and background music
reproduction
u For applications where directivity is important
u Slim-line weatherproof design
The LA1-UM20E-1 and LA1-UM40E-1 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 LA1UM20E-1 and LA1-UM40E-1 are designed for voice
alarm systems.
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,
u Swivel wall mounting bracket supplied as standard
u Robust aluminum construction
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, hightemperature 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 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
478mm
18.8"
96mm
3.8"
84mm
3.3"
100mm
3.94"
778mm
30.6"
96mm
3.8"
84mm
3.3"
100mm
3.94"
| LA1‑UMx0E‑1 Metal Column Loudspeakers
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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.
Safety acc. to EN 60065
Emergency acc. to EN 54‑24
acc. to EN 60849
acc. to BS 5839‑8
Water and dust protection acc. to EN 60529 IP 65
Wind‑force acc. to Bft11
Region Certification
Europe CPR
Poland CNBOP
Installation/configuration notes
The column loudspeakers can be wall mounted using
the swivel wall bracket standard supplied, or directly
onto a floor stand LBC 1259/01 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 1 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-UM40E-1 Dimensions mm (in)
LA1-UM20E-1 Dimensions mm (in)
8Ω
1/8
1/4
1/2
1
70.7V100V
1
1/2
1/4
1/8
8Ω
8Ω 8Ω
8Ω
1 = 20W
1/2 = 10W
1/4 = 5W
1/8 = 2.5W
A
B
8Ω
1/8
1/4
1/2
1
70.7V100V
1
1/2
1/4
1/8
4Ω
4Ω 4Ω
4Ω
4Ω
4Ω4Ω
4Ω
1 = 40W
1/2 = 20W
1/4 = 10W
1/8 = 5W
A
B
55 mm (2.17")
7 mm
(0.82")
100 mm (3.94")
60
70
80
90
100
110
10 100 1000 10000 100000
dB SPL
BOSCH
60
70
80
90
100
110
10 100 1000 10000 100000
dB SPL
BOSCH
| LA1‑UMx0E‑1 Metal Column Loudspeakers
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LA1-UM40E-1 Circuit diagram (A: Phase, B: Common)
LA1-UM20E-1 / LA1-UM40E-1 Rear view
LA1-UM20E-1 Circuit diagram (A: Phase, B: Common)
Details mounting bracket
LA1-UM20E-1 Frequency response
LA1-UM40E-1 Frequency response
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