The document describes the LB1-UMx0E Premium-sound Cabinet Loudspeaker Range. It includes two models, the LB1-UM20E and LB1-UM50E, offering 20W or 50W power handling capacity respectively. Both have high-fidelity reproduction of speech and music, selectable input connections, and protection against overloads. They are intended for clear audio in indoor and outdoor applications such as theme parks, restaurants, and offices.

1. Communications Systems | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
LB1‑UMx0E Premium‑sound Cabinet
Loudspeaker Range
www.boschsecurity.com
u High-fidelity music and speech reproduction
u Selectable 8 ohm, 70 V and 100 V inputs
u Compact yet robust aluminum extruded enclosure
u Supplied with adjustable wall‑mounting bracket
u Self‑restoring overload protection
The Premium‑sound range of cabinets is intended for An easy to install, sturdy wall mounting bracket is
clear reproduction of speech, foreground and standard supplied. The same bracket can be used in
background music to be used in general indoor and combination with the universal floor stand
outdoor applications. The range comprises two LBC 1259/00 for temporary installations.
models, offering a choice of 20 W or 50 W power All models are supplied with a built‑in 70/100 V
handling capacity. The enclosures are made from transformer with taps on the primary winding for
aluminum with ABS top and bottom covers and are full‑power, half‑power, quarter‑power and one‑eighth
available in charcoal (D) and white (L). power radiation. These taps are connected to a rotary
Typical applications for these products are: theme vari‑tap switch located in the compartment in the base
bars, music restaurants, theme parks, retail outlets, of the enclosure, to allow simple output power setting.
audio visual, boardrooms and offices, exhibition areas A low ohmic connection is also provided on the
and presentation environments, fitness centre. vari‑tap switch.
Its excellent sound reproduction capability is
attributed the superb to the use of high‑quality driver Functions
components and crossover network design. Voice alarm
A self‑restoring passive element protects the high Voice alarm loudspeakers are specifically designed for
frequency driver against incidental overload. use in buildings, where the performance of Public
The cabinets can be used as VA (Voice‑Alarm) and are Address systems is subject to official regulations. The
compliant with BS 5839‑8 and EN 60849 standards. LB1‑UMx0E‑x are designed for voice alarm systems,
A three‑way ceramic terminal block with screw and are compliant with British Standard BS 5839‑8
connections suitable for loop-through wiring is located and EN 60849.
in the compartment in the base of the unit.

2. 2 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
Protection LB1‑UM20E‑D/L
The loudspeakers have built‑in protection to ensure
that in the event of a fire damage does not cause 280 mm 7 mm
11.02 in
failure of the connected circuit. In this way, system 160 mm 180 mm
(0.82")
integrity is maintained; ensuring loudspeakers in other 6.29 in 7.08 in
55 mm (2.17")
areas can still be used to inform people of the
situation.
Connections and safety 274 mm 100 mm (3.94")
The loudspeakers have a ceramic terminal block,
10.78 in
thermal fuse, and heat‑resistant, high‑temperature
wiring. The cabinets have a provision for internally
mounting the optional line/loudspeaker supervision
board.
Dimensions
Certifications and Approvals
All Bosch loudspeakers are designed to withstand
F 8 ohms
E 2.5W
operating at their rated power for 100 hours in D 5W 2.5W
8 ohms
accordance with IEC 268‑5 Power Handling Capacity
( ) C 10W 5W
B 20W 10W
(PHC) standards. Bosch has also developed the A 20W
W
Simulated Acoustical Feedback Exposure (SAFE) test 100V 70.7V
to demonstrate that the speakers can withstand two
0 T
F' C
( )
times their rated power for short durations. This E'
ensures extra reliability under extreme conditions, D'
C'
leading to greater customer satisfaction, longer B'
operating life, and much less chance of failure or A'
performance deterioration.
Circuit diagram
Safety according to EN 60065
110
dB SPL
Emergency according to BS 5839‑8 100
BOSCH
according to EN 60849 90
80
Water and dust protection according to EN 60529 IP 65
70
Self‑extinguishing ABS according to UL 94 V 0 60
10 100 1000 10000 100000
(Hz)
Wind‑force according to NEN 6702:2007 +
A1: 2008, Bft11 Frequency response
Installation/Configuration Notes LB1‑UM20E‑D/L
LB1‑UMx0E‑D/L 340
350 0 10
20
5
330 30
320 0 40
310 -5 50
300 -10 60
290 -15 70
-20
280 80
-25
270 90
-30
260 100
250 110
240 120
230 130
220 140
210 150
200 160
190 170
180
125 250 500 1000
Polar diagram horizontal
Mounting bracket

3. 3 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
350 0 10 0
340 20 350 10
5 340 5 20
330 30 330 30
320 0 40 320 0 40
310 -5 50 310 -5 50
300 -10 60 300 -10 60
290 -15 70 290 -15 70
-20 -20
280 80 280 80
-25 -25
270 90 270 90
-30 -30
260 100 260 100
250 110 250 110
240 120 240 120
230 130 230 130
220 140 220 140
210 150 210 150
200 160 200 160
190 170 190 170
180 180
1000 2000 4000 8000 1000 2000 4000 8000
Polar diagram horizontal Polar diagram vertical
Octave band sensitivity *
350 0 10
340 5 20
330 30
Octave SPL Total octave Total octave
320 0 40
310 50
1W/1m SPL SPL
-5
1W/1m Pmax/1m
300 -10 60
290 -15 70
280
-20
80 125 Hz 82.5 - -
-25
270
-30
90
250 Hz 82.5 - -
260 100
250 110
500 Hz 85.4 - -
240 120
1000 Hz 88.2 - -
230 130
220 140 2000 Hz 88.0
210 150
200 160
190
180
170
4000 Hz 85.5 - -
125 250 500 1000 8000 Hz 86.3 - -
A-weighted - 84.1 96.4
Polar diagram vertical
Lin-weighted - 85.0 97.4
Octave band opening angles
Horizontal Vertical
125 Hz 360 360
250 Hz 360 360
500 Hz 206 360
1000 Hz 174 127
2000 Hz 128 141
4000 Hz 136 141
8000 Hz 132 117
Acoustical performance specified per octave

4. 4 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
* (all measurements are done with a pink noise signal;
the values are in dBSPL)
LB1‑UM50E‑D/L
LB1‑UM50E‑D/L
350 0 10
340 5 20
330 30
280 mm
11.02 in 320 0 40
160 mm 180 mm 310 -5 50
6.29 in 7.08 in 7 mm
300 -10 60
(0.82")
290 -15 70
55 mm (2.17")
-20
280 80
-25
270 90
-30
405 mm 260 100
15.94 in 100 mm (3.94")
250 110
240 120
230 130
220 140
210 150
200 160
190 170
180
Dimensions 125 250 500 1000
F 8 ohms Polar diagram horizontal
E 6.25W
8 ohms W
D 12.5W 6.25W
( ) C 25W 12.5W 350 0 10
340 5 20
B 50W 25W 330 30
W
A 50W 320 0 40
310 -5 50
100V 70.7V
0 T
300 -10 60
F' C
( ) -15
290 70
E'
-20
D' 280 80
C' -25
270 90
B' -30
A' 260 100
250 110
Circuit diagram 240 120
230 130
110 140
dB SPL
220
BOSCH
210 150
100 200 160
190 170
180
90
80
1000 2000 4000 8000
70
60
10 100 1000 10000 100000 Polar diagram horizontal
(Hz)
Frequency response

5. 5 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
500 Hz 89.0 - -
1000 Hz 90.7 - -
2000 Hz 90.1
4000 Hz 88.5 - -
8000 Hz 89.0 - -
A-weighted - 86.7 102.9
350 0 10
Lin-weighted - 87.6 102.9
340 5 20
330 30
320 0 40
310 -5 50
300 -10 60
Octave band opening angles
290 -15 70 Horizontal Vertical
-20
280 80
-25 125 Hz 360 > 180
270 90
-30
260 100 250 Hz 360 > 180
250 110
500 Hz 209 142
240 120
230 130 1000 Hz 186 84
220 140
210
200 160
150
2000 Hz 126 47
190 170
180
4000 Hz 126 62
125 250 500 1000 8000 Hz 119 95
Polar diagram vertical Acoustical performance specified per octave
* (all measurements are done with a pink noise signal;
350 0 10 the values are in dBSPL)
340 5 20
330 30
320 0 40
Parts Included
310 -5 50
300 -10 60
Quantity Components
290 -15 70
280
-20
80 1 LB1‑UMx0E‑x
-25
270 90
-30 1 Mounting bracket
260 100
250 110 1 Installation instruction
240 120
230 130 Technical Specifications
220 140
210
160
150 Electrical*
200 170
190
180
Product LB1‑UM20E‑(D/L) LB1‑UM50E‑(D/L)
1000 2000 4000 8000
Description Premium‑sound Premium‑sound
Cabinet Cabinet
Polar diagram vertical
Loudspeaker Loudspeaker
Maximum power 30 W 75 W
Rated power (PHC) 20 W 50 W
Power tapping 20 / 10 / 5 / 2.5 W 50 / 25 / 12.5 / 6.2
5W
Octave band sensitivity * Sound pressure level 101 dB / 88 dB 108 dB / 91 dB
at rated power / (SPL) (SPL)
Octave SPL Total octave Total octave 1 W (1 kHz, 1 m)
1W/1m SPL SPL
1W/1m Pmax/1m Effective frequency 90 Hz to 20 kHz 90 Hz to 20 kHz
range (-10 dB)
125 Hz 85.3 - -
250 Hz 86.1 - -

6. 6 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
Opening angle LB1‑UM50E‑L Premium‑sound Cabinet Loudspeaker
at 1 kHz / 4 kHz 50 W White
(-6 dB) metal housing, for indoor and outdoor use
horizontal 174° / 136° 186° / 126° Order number LB1-UM50E-L
Accessories
vertical 127° / 141° 84° / 62°
LBC 1259/00 Universal Floorstand
Rated input voltage 12.65 / 70 / 100 V 20 / 70 / 100 V Lightweight aluminum construction, foldable,
Rated impedance 8 / 250 / 500 ohm 8 / 100 / 200 ohm
M10 x 12 reducer flange.
Order number LBC1259/00
Connector 3‑pole screw block 3‑pole screw block
LBC 1259/01 Universal Floorstand
* Technical performance data acc. to IEC 60268‑5 Lightweight aluminum construction, foldable,
Mechanical M10 x 12 reducer flange.
Order number LBC1259/01
Product LB1‑UM20‑(D/L) LB1‑UM50‑(D/L)
Dimensions (W x D) 274x160x180mm 405x160x180mm
(10.78x6.29x7.08i (15.94x6.29x7.08i
n) n)
Loudspeaker diameter
Woofer 134.5 mm (5 in) 134.5 mm (5 in)
Dome tweeter 25.4 mm (1 in) 25.4 mm (1 in)
Material
Cabinet Aluminum Aluminum
Front grille Aluminum Aluminum
Top and bottom ABS ABS
Color White (RAL 9010) White (RAL 9010)
(L) or (L) or
Charcoal Charcoal
(RAL 7021) (D) (RAL 7021) (D)
Weight 3.88 kg (8.55 lb) 5.58 kg (12.30 lb)
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%
Ordering Information
LB1‑UM20E‑D Premium‑sound Cabinet Loudspeaker
20 W Charcoal
metal housing, for indoor and outdoor use
Order number LB1-UM20E-D
LB1‑UM20E‑L Premium‑sound Cabinet Loudspeaker
20 W White
metal housing, for indoor and outdoor use
Order number LB1-UM20E-L
LB1‑UM50E‑D Premium‑sound Cabinet Loudspeaker
50 W Charcoal
metal housing, for indoor and outdoor use
Order number LB1-UM50E-D

7. 7 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range
Represented by:
© Bosch Security Systems 2012 | Data subject to change without notice
1908374539 | en, V1, 16. Apr 2012