Bosch LB20-PC60EW-5D Bedienungsanleitung
LB20 EVAC Cabinet Loudspeaker
Models
LB20-PC60EW-5D | LB20-PC60EW-5L
en Installation manual
LB20 EVAC Cabinet Loudspeaker Models Table of contents | en 3
Bosch Security Systems B.V. Installation manual 2017.09 | V.02 | F.01U.345.361
Table of contents
1Safety 4
1.1 Suspension 4
1.2 Notices 4
2Introduction 5
2.1 System features 5
2.2 Product information 5
2.3 Packing list 6
3Installation and wiring 7
3.1 Installing the speaker 7
3.2 U-Bracket installation options 8
3.3 Wiring 9
3.4 Transformer taps 10
3.5 Replacing the logo 11
4Troubleshooting 12
5Technical data 13
5.1 Dimensions 14
5.2 Frequency response and impedance 14
6U-Bracket dimensions 15
4en | Safety LB20 EVAC Cabinet Loudspeaker Models
2017.09 | V.02 | F.01U.345.361 Installation manual Bosch Security Systems B.V.
1 Safety
1.1 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.
Safety point
As an added safety measure, it is suggested the user install an extra suspension point back to
the building structural supports. This safety point should have as little slack as possible (less
than 1-inch is preferable).
Figure1.1: Redundant safety point
1.2 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 Security Systems, Inc.
The content and illustrations are subject to change without prior notice.
LB20 EVAC Cabinet Loudspeaker Models Introduction | en 5
Bosch Security Systems B.V. Installation manual 2017.09 | V.02 | F.01U.345.361
2 Introduction
The LB20 premium cabinet loudspeakers from Bosch Security Systems, Inc is a line of
compact, high-performance, two-way, 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 LB20 premium cabinet loudspeakers are the perfect
solution for a wide variety of surface mount applications.
The LB20-PC60EW-5 models are IP65 rated, designed to withstand the toughest weather
conditions.
Read through this manual to familiarize yourself with the safety information, features, and
applications before you use these products.
2.1 System features
– Carefully engineered for the toughest weather conditions (IP65)
– Long throw 5.25" (133 mm) woofer housed in a UL 94-5VB fire rated ABS plastic for
extended LF performance down to 55 Hz
– 90 W power handling provides for 108 dB maximum SPL (114 dB Peak)
– 60 W transformer with 8 Ω pass-through
2.2 Product information
Item Description
A Grille
B Safety cable loop
C Weather input cover
D Gland nut
E U-Bracket
Tab.2.1: Product information
A
C
D
B
E
Figure2.1: Product information
6en | Introduction LB20 EVAC Cabinet Loudspeaker Models
2017.09 | V.02 | F.01U.345.361 Installation manual Bosch Security Systems B.V.
2.3 Packing list
Item Quantity Component
A 2 Speakers
B 1 Allen wrench
C 4 Safety screws for the U-Brackets
D 2 U-bracket
E 2 Weather covers
F 8 Weather cover screws
G 2 Grille logos (spares)
H 1 Installation manual
Tab.2.2: Components list
A (x2) BD (x2)
C (x4)
E (x2) F (x8) G (x2) H
Figure2.2: Components list
LB20 EVAC Cabinet Loudspeaker Models Installation and wiring | en 7
Bosch Security Systems B.V. Installation manual 2017.09 | V.02 | F.01U.345.361
3 Installation and wiring
3.1 Installing the speaker
For safety, ensure the mounting surface supports more than the weight of the speaker. Use
only industry-accepted fasteners and mounting methods when mounting the U-Bracket.
Consult an expert if you are unsure.
!
Caution!
It is the installer's responsibility to determine and use the proper mounting hardware for
the wall construction type.
Disregarding this caution could result in damage to the product and personal injuries may
occur.
Installing the U-Bracket
To install the U-bracket, do the following:
1. Draw a level line.
2. Align screw holes on the level line.
3. Install two mounting screws to secure the U-Bracket to the wall.
Installing the speaker
To install the speaker, do the following:
1. Wire the speaker, as shown in the wiring section.
2. Insert the two screws (provided) into the U-Bracket mounting points.
Loosely tighten the two screws using the Allen wrench (provided).
3. Aim the speaker.
4. Tighten the two screws to secure the U-Bracket to the speaker.
Ensure the speaker is secured to the U-Bracket.
8en | Installation and wiring LB20 EVAC Cabinet Loudspeaker Models
2017.09 | V.02 | F.01U.345.361 Installation manual Bosch Security Systems B.V.
Safety point
As an added safety measure, it is suggested the user install an extra suspension point back to
the building structural supports. This safety point should have as little slack as possible (less
than 1-inch is preferable).
Figure3.1: Redundant safety point
See also
– U-Bracket installation options, page 8
– Wiring, page 9
3.2 U-Bracket installation options
Using a U-Bolt
The U-Bracket can be mounted using a standard 2-inch or 4-inch U-Bolt.
Figure3.2: U-Bolt — 2-inch
Figure3.3: U-Bolt — 4-inch
LB20 EVAC Cabinet Loudspeaker Models Installation and wiring | en 9
Bosch Security Systems B.V. Installation manual 2017.09 | V.02 | F.01U.345.361
Using a threaded rod
The U-Bracket can be installed to a threaded rod.
Figure3.4: Threaded rod
Using a pole mount
The U-Bracket can be installed to a pole mount using steel band clamps.
Figure3.5: Pole mount
Using a junction box
The U-Bracket can be installed to a junction box using a 0.25” rubber grommet (not included)
for wiring.
Figure3.6: Junction box
See also
– Installing the speaker, page 7
3.3 Wiring
Wiring the speaker
The speaker can be wired using either 2-wires, for input only, or 4-wires, for input and parallel
output. Reference the polarity markers on the Euroblock.
To wire the speaker using the weather cover, do the following:
10 en | Installation and wiring LB20 EVAC Cabinet Loudspeaker Models
2017.09 | V.02 | F.01U.345.361 Installation manual Bosch Security Systems B.V.
1. Push the wire through the gland nut.
2. Wire the Euroblock connector (A).
A
B
C
A
B
C
3. Adjust the tap settings, if needed.
4. Mount the speaker, as shown in the installation section.
5. Plug the Euroblock connector into the speaker.
6. Insert the four screws into the weather cover (B).
Loosely tighten the four screws to keep the weather cover in place.
7. Tighten all four screws to secure the weather cover.
Ensure the weather cover is secure.
8. Adjust the wire length.
9. Tighten the gland nut (C).
See also
– Installing the speaker, page 7
3.4 Transformer taps
You can select the mode of operation (70 V/100 V/8 ohm) and power taps using the rotary
switch on the input panel.
Configuring the transformer settings
To configure the transformer settings, do the following:
1. Select the desired power tap by using the rotary switch on the input panel.
+
A
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