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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
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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)
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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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125 250 500 1000
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-30
-25
-20
-15
-10
-5
5
0
0
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11
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-30
-25
-20
-15
-10
-5
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0
0
| LA1‑UMx0E‑1 Metal Column Loudspeakers
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LA1-UM20E-1 Polar-diagram (horizontal)
LA1-UM20E-1 Polar diagram (vertical)
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125 250 500 1000
10
20
30
40
50
60
70
80
90
100
11
120
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200
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-30
-25
-20
-15
-10
-5
5
0
0
1000 2000 4000 8000
-30
-25
-20
-15
-10
-5
5
0
0
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11 0
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125 250 500 1000
1000 2000 4000 8000
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140
150
160
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180
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200
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220
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280
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300
310
320
330
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350
-30
-25
-20
-15
-10
-5
5
0
0
10
20
30
40
50
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100
11
120
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-30
-25
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-10
-5
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0
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LA1-UM40E-1 Polar diagram (horizontal)
LA1-UM40E-1 Polar diagram (vertical)
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6 | LA1‑UMx0E‑1 Metal Column Loudspeakers
Octave band sensitivity LA1-UM20E-1
Octave SPL
1W/1m
Total octave
SPL
1W/1m
Total octave
SPL
Pmax/1m
125 Hz 75.9 - -
250 Hz 82.9 - -
500 Hz 88.7 - -
1000 Hz 91.5 - -
2000 Hz 93.9 - -
4000 Hz 94.5 - -
8000 Hz 89.6 - -
A-weighted - 89.7 101.5
Lin-weighted - 89.6 101.6
Octave band opening angles LA1-UM20E-1
Horizontal Vertical
125 Hz 360 >180
250 Hz 360 >180
500 Hz 360 160
1000 Hz 210 80
2000 Hz 148 43
4000 Hz 94 22
8000 Hz 95 10
Octave band sensitivity LA1-UM40E-1
Octave SPL
1W/1m
Total octave
SPL
1W/1m
125 Hz 78.5 - -
250 Hz 86.7 - -
500 Hz 92.2 - -
1000 Hz 95.2 - -
2000 Hz 97.4 - -
4000 Hz 97.8 - -
8000 Hz 90.7 - -
A-weighted - 93.0 107.6
Lin-weighted - 92.3 107.5
Total octave
SPL
Pmax/1m
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| LA1‑UMx0E‑1 Metal Column Loudspeakers
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Octave band opening angles LA1-UM40E-1
Horizontal Vertical
125 Hz 360 >180
250 Hz 360 >180
500 Hz 360 82
1000 Hz 240 40
2000 Hz 146 22
4000 Hz 92 12
8000 Hz 97 6
Acoustical performance specified per octave * (all
measurements are done with a pink noise signal; the
values are in dBSPL).
Technical specifications
Electrical*
Description LA1-UM20E-1 LA1-UM40E-1
Maximum power 30 W 60 W
Rated power (PHC) 20 W 40 W
Power tapping 20 / 10 / 5 / 2.5 W 40 / 20 / 10 / 5 W
Sound pressure level at
rated power / 1 W
(1 kHz, 1 m)
Sound pressure level at
rated power / 1 W
(1 kHz, 4 m)
105 / 92 dB (SPL) 111 / 95 dB (SPL)
89 / 76 dB (SPL) 94 / 78 dB (SPL)
Rated impedance
LA1‑UM40E‑1
40 W 8 Ohm 125
Ohm
20 W N/A 250
Ohm
10 W N/A 500
Ohm
5 W N/A 1000
Ohm
250
Ohm
500
Ohm
1000
Ohm
2000
Ohm
* Technical performance data acc. to IEC 60268‑5
Mechanical
LA1-UM20E-1 LA1-UM40E-1
Dimensions (L x W x D) 478 x 84 x 96 m
m
(18.8 x3.3 x 3.8
in)
Weight 2.9 kg (6.4 lb) 4.4 kg (9.7 lb)
Color White
(RAL 9010)
Material
• enclosure
• front grille
• top and bottom
Connection 1 m (39.37 in)
Connector
(phase, common, earth)
Aluminium
Aluminium
ABS
3-wire cable
3‑pole screw
block
778 x 84 x 96 m
m
(30.6 x3.3 x 3.8
in)
White
(RAL 9010)
Aluminium
Aluminium
ABS
1 m (39.37 in)
3-wire cable
3‑pole screw
block
Environmental
Effective frequency
range (-10 dB)
Horizontal opening
angle
at 1 kHz / 4 kHz (-6 dB)
Vertical opening angle
at 1 kHz / 4 kHz (-6 dB)
Rated input voltage
LA1‑UM20E‑1
Rated impedance
LA1‑UM20E-1
Rated input voltage
LA1‑UM40E‑1
240 Hz to 16 kHz 250 Hz to 16 kHz
210°/ 94° 240°/ 92°
80°/ 22° 40°/ 12°
12.65 V 70 V 100 V
20 W 8 Ohm 250
Ohm
10 W N/A 500
Ohm
5 W N/A 1000
Ohm
2.5 W N/A 2000
Ohm
17.89 V 70 V 100 V
500
Ohm
1000
Ohm
2000
Ohm
4000
Ohm
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)
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
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8 | LA1‑UMx0E‑1 Metal Column Loudspeakers
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
emea.securitysystems@bosch.com
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: +1 800 289 0096
Fax: +1 585 223 9180
onlinehelp@us.bosch.com
www.boschsecurity.us
Robert Bosch (SEA) Pte Ltd, Security Systems
11 Bishan Street 21
Singapore 573943
Phone: +65 6571 2808
Fax: +65 6571 2699
apr.securitysystems@bosch.com
www.boschsecurity.asia
© Bosch Security Systems 2016 | Data subject to change without notice
1911738379 | en, V11, 14. Dec 2016
CE label
Ordering information
LA1‑UM20E‑1 Metal Column Loudspeaker
Column loudspeaker 20 W, aluminum extruded
enclosure, water and dust protected IP65, white
RAL 9010.
Order number LA1-UM20E-1
LA1‑UM40E‑1 Metal Column Loudspeaker
Column loudspeaker 40 W, aluminum extruded
enclosure, water and dust protected IP65, white
RAL 9010.
Order number LA1-UM40E-1
Accessories
LBC 1259/01 Universal Floorstand
Universal floor stand lightweight aluminum
construction, foldable, M10 x 12 reducer flange.
Order number LBC1259/01
LM1‑CB Carrier Bag for two floorstands
Carrying bag for storing and transporting two floor
stands.
Order number LM1-CB
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