Bosch LB1-UM20E-D User Manual
Connections and safety
The loudspeakers have a ceramic terminal block,
thermal fuse, and heat‑resistant, high‑temperature
wiring. The cabinets have a provision for internally
mounting the optional line/loudspeaker supervision
board.
thermal fuse, and heat‑resistant, high‑temperature
wiring. The cabinets have a provision for internally
mounting the optional line/loudspeaker supervision
board.
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.
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.
Safety
according to EN 60065
Emergency
according to EN 54‑24
according to BS 5839‑8 /
EN 60849
Water and dust protection
according to EN 60529 IP 65
Self‑extinguishing ABS
according to UL 94 V 0
Wind‑force
according to NEN 6702:2007 +
A1: 2008, Bft11
Region
Certification
Europe
CPD
Installation/configuration notes
LB1‑UMx0E‑D/L
Mounting bracket
LB1‑UM20E‑D/L
274 mm
10.78 in
160 mm
6.29 in
180 mm
7.08 in
280 mm
11.02 in
55 mm (2.
17")
7 mm
(0.82")
100 mm (3.94")
Dimensions
2.5W
( )
( )
5W
10W
20W
20W
10W
5W
2.5W
70.7V
100V
8 ohms
8 ohms
W
T
C
0
A
B
C
D
E
F
F'
E'
D'
C'
B'
A'
Circuit diagram
60
70
80
90
100
110
10
100
1000
10000
100000
(Hz)
dB S
P
L
BOSCH
Frequency response
LB1‑UM20E‑D/L
-30
-25
-20
-15
-10
-5
0
5
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
Polar diagram horizontal
2 | LB1‑UMx0E Premium‑sound Cabinet Loudspeaker Range