Communications Systems | LA1‑UMx0E Metal Column Loudspeakers
LA1‑UMx0E Metal Column Loudspeakers
Good speech intelligibility and background music
▶
reproduction
For applications where directivity is important
▶
Slim-line weatherproof design
▶
Swivel wall mounting bracket supplied as standard
▶
Robust aluminum construction
▶
Switchable between 100 V line and 8 Ohms
▶
Provision for inside mounting of the optional line/
▶
loudspeaker supervision board
Recommended for voice evacuation systems
▶
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.
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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)
LA1‑UMx0E Metal Column Loudspeakers | 3
1
1/2
1/4
1/8
= 20W
= 10W
= 5W
= 2.5W
1
1/2
1/4
1/8
8
8 8
8 8
A
B
C
1
1/2
1/4
1/8
= 40W
= 20W
= 10W
= 5W
1
1/2
1/4
1/8
8
4 4
4 4
4 4
4 4
A
B
C
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-UM40E Circuit diagram (A: OFF, B: Phase, C: Common)
LA1-UM20E / LA1-UM40E Back view
LA1-UM20E Circuit diagram (A: OFF, B: Phase, C: Common)
LA1-UM20E Frequency response
LA1-UM40E Frequency response
www.boschsecurity.com
4 | LA1‑UMx0E Metal Column Loudspeakers
125 250 500 1000
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
-30
-25
-20
-15
-10
-5
5
0
0
1000 2000 4000 8000
10
20
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80
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100
11
120
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220
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240
250
260
270
280
290
300
310
320
330
340
350
-30
-25
-20
-15
-10
-5
5
0
0
125 250 500 1000
10
20
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100
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120
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-30
-25
-20
-15
-10
-5
5
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0
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-30
-25
-20
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-10
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5
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0
125 250 500 1000
10
20
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60
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100
11
120
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210
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250
260
270
280
290
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310
320
330
340
350
-30
-25
-20
-15
-10
-5
5
0
0
1000 2000 4000 8000
-30
-25
-20
-15
-10
-5
5
0
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
125 250 500 1000
1000 2000 4000 8000
10
20
30
40
50
60
70
80
90
100
11
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
-30
-25
-20
-15
-10
-5
5
0
0
10
20
30
40
50
60
70
80
90
100
11
120
130
140
150
160
170
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
-30
-25
-20
-15
-10
-5
5
0
0
LA1-UM20E Polar-diagram (horizontal)
LA1-UM40E Polar diagram (horizontal)
LA1-UM20E Polar diagram (vertical)
LA1-UM40E Polar diagram (vertical)
LA1‑UMx0E Metal Column Loudspeakers | 5
Octave band sensitivity LA1-UM20E
Octave SPL
1W/m
125 Hz 72.2 - -
250 Hz 81.9 - -
500 Hz 89.7 - -
1000 Hz 91.9 - -
2000 Hz 94.2 - -
4000 Hz 94.8 - -
8000 Hz 90.0 - -
A-weighted - 90.2 102.3
Lin-weighted - 90.1 101.6
Octave band opening angles LA1-UM20E
Horizontal Vertical
125 Hz 360 >180
250 Hz 360 >180
500 Hz 360 150
1000 Hz 210 82
2000 Hz 150 43
4000 Hz 96 23
8000 Hz 98 11
Octave band sensitivity LA1-UM40E
Octave SPL
1W/m
125 Hz 76.2 - -
250 Hz 86.0 - -
500 Hz 93.4 - -
1000 Hz 95.8 - -
2000 Hz 97.8 - -
4000 Hz 98.1 - -
8000 Hz 92.0 - -
A-weighted - 93.7 109.0
Lin-weighted - 93.4 107.9
Octave band opening angles LA1-UM40E
Horizontal Vertical
125 Hz 360 >180
250 Hz 360 >180
500 Hz 360 80
1000 Hz 211 40
2000 Hz 150 22
4000 Hz 94 12
8000 Hz 106 6
Acoustical performance specified per octave
* (all measurements are done with a pink noise signal; the
values are in dBSPL).
Total octave SPL
1W/m
Total octave SPL
1W/m
Total octave SPL
Pmax/m
Total octave SPL
Pmax/m
Parts Included
Quantity Components
1 LA1‑UMx0E Metal Column loudspeaker
1 Wall mounting bracket
1 Installation instruction
Technical Specifications
Electrical*
Description LA1-UM20E LA1-UM40E
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 6 W / 1 W (1 kHz, 1 m)
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 100 V 100 V
Rated impedance 500 ohm / 8 ohm 250 ohm / 8 ohm
* Technical performance data acc. to IEC 60268‑5
Mechanical
Dimensions (W x D) 450 x 84 x 96 mm
Weight 2.9 kg (6.4 lb) 4.4 kg (9.7 lb)
Color White (RAL 9010) White (RAL 9010)
Material (housing and grille) Extruded alumi-
Connection 2 m 3-wire cable 2 m 3-wire cable
Connector
(phase, common, earth)
Environmental
Operating temperature -25 ºC to +55 ºC (-13 ºF to +131 ºF)
Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
Relative humidity <95%
105 / 92 dB (SPL) 112 / 96 dB (SPL)
240 Hz to 16 kHz 250 Hz to 16 kHz
210°/ 82° 212°/ 94°
82°/ 24° 40°/ 12°
LA1-UM20E LA1-UM40E
750 x 84 x 96 mm
(17.7 x3.3 x 3.8 in)
num / steel
3‑pole screw block 3‑pole screw block
(29.5 x3.3 x 3.8 in)
Extruded aluminum / steel
Ordering Information
LA1‑UM20E Metal Column Loudspeaker
20 W
LA1‑UM40E Metal Column Loudspeaker
40 W
LA1-UM20E
LA1-UM40E
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6 | LA1‑UMx0E Metal Column Loudspeakers
Americas:
Bosch Communications Systems
12000 Portland Avenue South
Burnsville, Minnesota 55337, USA
Phone: +1-800-392-3497
Fax: +1-800-955-6831
audiosupport@us.bosch.com
www.boschsecurity.com
© Bosch Security Systems Inc. 011 | Data subject to change without notice
T4683665547 | Cur: en-US, V20, 27 Jan 2011
Europe, Middle East, Africa:
Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: +31 40 2577 330
emea.securitysystems@bosch.com
www.boschsecurity.com
Asia-Pacific:
Robert Bosch (SEA) Pte Ltd
11 Bishan Street 21
Singapore 573943
Phone: +65 6571 2600
Fax: +65 6571 2698
apr.securitysystems@bosch.com
www.boschsecurity.com
Represented by
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