Bosch LB20-PC40-4L, LB20-PC75-5D, LB20-PC15-4D, LB20-PC15-4L, LB20-PC30-5D Installation Manual
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Premium Cabinet Loudspeakers
en Installation manual
Table of contents
1
Safety 4
1.1 Suspension 4
1.2 Notices 4
2
Short information 5
3
Introduction 6
3.1 System features 6
3.2 Packing list 7
3.3 Product information 9
4
Installation and wiring 10
4.1 Installing the speaker 10
4.2 Wiring 13
4.2.1 Wall bracket wiring 13
4.2.2 Alternative Euroblock connection 14
4.3 Transformer taps 15
4.3.1 LB20-PC15-4 cabinet speakers 70V/100V 16
4.3.2 LB20-PC30-5 cabinet speakers 70V/100V 17
4.3.3 LB20-PC60-8 cabinet speakers 70V/100V 17
4.4 Replacing the logo 18
5
Troubleshooting 19
6
Technical data 20
6.1 LB20-PC40-4/LB20-PC15-4 cabinet speakers 20
6.1.1 Dimensions 21
6.1.2 Frequency response and impedance 21
6.2 LB20-PC75-5/LB20-PC30-5 cabinet speakers 22
6.2.1 Dimensions 23
6.2.2 Frequency response and impedance 23
6.3 LB20-PC90-8/LB20-PC60-8 cabinet speakers 24
6.3.1 Dimensions 25
6.3.2 Frequency response and impedance 25
7
Wall bracket dimensions 26
7.1 LB20-PC40-4/LB20-PC15-4 wall bracket dimensions 26
7.2 LB20-PC75-5/LB20-PC60-5/LB20-PC90-8/LC20-PC60-8 wall bracket dimensions 27
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Bosch Security Systems B.V. Installation manual 2017.08 | 01 | F.01U.345.357
Safety
Suspension
!
Warning!
Suspending any object is potentially dangerous and should only be attempted by individuals
who have thorough knowledge of the techniques and regulations of suspending objects
overhead. Bosch strongly recommends all loudspeakers be suspended taking into account all
current national, federal, state, and local laws and regulations. It is the responsibility of the
installer to ensure all loudspeakers are safely installed in accordance with all such
requirements. When loudspeakers are suspended, Bosch strongly recommends the system be
inspected at least once per year or as laws and regulations require. If any sign of weakness or
damage is detected, remedial action should be taken immediately. The user is responsible for
making sure the wall, ceiling, or structure is capable of supporting all objects suspended
overhead. Any hardware used to suspend a loudspeaker not associated with Bosch is the
responsibility of others.
Redundant safety point
As an added safety measure, it is suggested the user install an extra suspension point back to
the building structural supports. This redundant safety point should have as little slack as
possible (less than 1-inch is preferable).
Figure 1.1: Redundant safety point - 4" (left), 5" (center), 8" (right)
Notices
Old electrical and electronic appliances
Electrical or electronic devices that are no longer serviceable must be collected separately and
sent for environmentally compatible recycling (in accordance with the European Waste
Electrical and Electronic Equipment Directive).
To dispose of old electrical or electronic devices, you should use the return and collection
systems put in place in the country concerned.
Copyright and disclaimer
All rights reserved. No part of this document may be reproduced or transmitted in any form by
any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior
written permission of the publisher. For information on getting permission for reprints and
excerpts, contact Bosch.
The content and illustrations are subject to change without prior notice.
1
1.1
1.2
4 en | Safety Premium Cabinet Loudspeakers
2017.08 | 01 | F.01U.345.357 Installation manual Bosch Security Systems B.V.
Short information
The following table lists products in a family, with CTN (Commercial Type Number) and
identifying product name DESCRIPTION.
CTN Description
LB20-PC40-4D Cabinet speaker 4" 8 Ohm black pair
LB20-PC40-4L Cabinet speaker 4" 8 Ohm white pair
LB20-PC15-4D Cabinet speaker 4" 70/100V black pair
LB20-PC15-4L Cabinet speaker 4" 70/100V white pair
LB20-PC75-5D Cabinet speaker 5" 8 Ohm black pair
LB20-PC75-5L Cabinet speaker 5" 8 Ohm white pair
LB20-PC30-5D Cabinet speaker 5" 70/100V black pair
LB20-PC30-5L Cabinet speaker 5" 70/100V white pair
LB20-PC90-8D Cabinet speaker 8" 8 Ohm black pair
LB20-PC90-8L Cabinet speaker 8" 8 Ohm white pair
LB20-PC60-8D Cabinet speaker 8" 70/100V black pair
LB20-PC60-8L Cabinet speaker 8" 70/100V white pair
2
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Bosch Security Systems B.V. Installation manual 2017.08 | 01 | F.01U.345.357
Introduction
The premium cabinet loudspeakers from Bosch are a line of compact, high-performance, twoway, full-range surface mount loudspeakers with excellent wide and uniform coverage, and
outstanding performance. Their design makes these practically invisible for use in background
and foreground music, paging, and sound reinforcement applications, making them ideal for
indoor and outdoor applications, such as restaurants, bars, patios, retail, fitness clubs,
hospitality, theme parks, leisure venues, and others. With unparalleled ease-of-installation,
sturdy weather resistance, modern and delicate look, and flexible mounting options, the
premium cabinet loudspeakers are the perfect solution for a wide variety of surface mount
applications.
These full-range loudspeakers (except for the LB20-PC60EW-5) include a unique and
innovative mount system from Bosch, prepared to make any job easier. This mount system
allows for 90 degrees of rotation horizontally and 45 degrees of rotation vertically. It comes
already assembled and is easily installed on walls and ceilings. Its unique and innovative
mount system makes every installation quick, simple, and reliable.
Read through this manual to familiarize yourself with the safety information, features, and
applications before you use these products.
System features
LB20-PC40-4/LB20-PC15-4
– Innovative mount system is included for quick, simple, and reliable installations
– Carefully engineered for outdoor environments (IP54), without compromising
performance
– Long throw 4" (102 mm) woofer housed in a fire rated ABS plastic enclosure for extended
LF performance down to 75 Hz
– 40 W power handling provides for 103 dB maximum SPL (109 dB peak)
– 70/100 V transformer version (LB20-PC15-4) available for constant voltage systems
LB20-PC75-5/LB20-PC30-5
– Innovative mount system is included for quick, simple, and reliable installations
– Carefully engineered for outdoor environments (IP54), without compromising
performance
– Long throw 5.25" (133 mm) woofer housed in a fire rated ABS plastic enclosure for
extended LF performance down to 60 Hz
– 75 W power handling provides for 109 dB maximum SPL (115 dB peak)
– 70/100 V transformer version (LB20-PC30-5) available for constant voltage systems
LB20-PC90-8/LB20-PC60-8
– Innovative mount system is included for quick, simple, and reliable installations
– Carefully engineered for outdoor environments (IP54), without compromising
performance
– Long throw 8" (203 mm) woofer housed in a fire rated ABS plastic enclosure for extended
LF performance down to 50 Hz
– 90 W power handling provides for 110 dB maximum SPL (116 dB peak)
– 70/100 V transformer version (LB20-PC60-8) available for constant voltage systems
3
3.1
6 en | Introduction Premium Cabinet Loudspeakers
2017.08 | 01 | F.01U.345.357 Installation manual Bosch Security Systems B.V.
Packing list
Item Quantity Component
A 2 Speakers with speaker brackets attached
B 2 Wall mount brackets
C 2 Dust covers
D 1 Allen wrench
E 2 Grille logos (spare)
F 2 Safety screws for the mounting brackets
G 2 Safety screw caps for the mounting brackets
H 2 Covers for the locking bolt
I 1 Installation manual
Table 3.1: Components list for speakers without transformer
A (x2)
B (x2)
D
C (x2)
E (x2)
F (x2)
G (x2)
H (x2)
I
Figure 3.1: Components list for speakers without transformer
3.2
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Bosch Security Systems B.V. Installation manual 2017.08 | 01 | F.01U.345.357
Item Quantity Component
A 2 Speakers with speaker brackets attached
B 2 Wall mount brackets
C 2 Dust covers
D 1 Allen wrench
E 2 Grille logos (spare)
F 2 Safety screws for the mounting brackets
G 2 Safety screw caps for the mounting brackets
H 2 Covers for the locking bolt
I 1 Installation manual
J 2 Flush input covers
K 8 Screws for flush input covers
Table 3.2: Components list for speakers with transformer
A (x2)
B (x2)
D
C (x2)
E (x2)
F (x2)
G (x2)
H (x2)
I
J (x2)
K (x8)
Figure 3.2: Components list for speakers with transformer
8
en | Introduction Premium Cabinet Loudspeakers
2017.08 | 01 | F.01U.345.357 Installation manual Bosch Security Systems B.V.
Product information
Item Description
A Grille
B Bubble level
C Wall bracket
D Safety cable loop
E Flush input cover
F Audio wire hole
G Locking bolt
H Audio connector
I Safety screw hole for bracket
J Speaker bracket
Table 3.3: Product information for all models
B
G
F
E
D
C
H
I
J
A
Figure 3.3: Product information (LB20-PC75-5/LB20-PC30-5 model shown)
3.3
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Bosch Security Systems B.V. Installation manual 2017.08 | 01 | F.01U.345.357
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