Bosch LC2-PC30G6-4 Guide

Prosound Ceiling Speakers
LC2-PC30G6-4 | LC2-PC30G6-8 | LC2-PC30G6-8L | LC2-PC60G6-8H | LC2-
PC60G6-10
en Installation and User Instructions

Table of contents
1Safety 4
2Welcome 5
2.1 Important Features 5
3System overview 6
3.1 Model Summary 6
3.2 Packing List 7
3.3 Product Feature Identification 8
4Installation and Wiring 9
4.1 Step 1 — Cut the Hole 9
4.2 Step 2 — Install C-Ring and/or Tile Rails 9
4.3 Step 3 — Attach Wiring to the Ceramic Connector 10
4.4 Step 4 — Mount the Speaker into the Ceiling 11
4.5 Step 5 — Connect an Auxiliary Support Line 11
4.6 Step 6 — Adjust Tap Selector 12
4.7 Step 7 — Attach the Grille 12
5Troubleshooting 14
6Technical data 15
7Appendices 17
7.1 Appendix A Painting the Speaker 17
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Safety
Safety First
Suspending any object is potentially dangerous and should only be attempted by individuals
who have a thorough knowledge of the techniques and regulations of rigging objects
overhead. Bosch strongly recommends that all speakers be suspended taking into account all
current national, federal, state and local regulations. It is the responsibility of the installer to
ensure that all speakers are safely installed in accordance with all such regulations. When
speakers are suspended, Bosch strongly recommends that the system be inspected at least
once a year. If any sign of weakness or damage is detected, remedial action should be taken
immediately. The user is responsible for making sure that the supporting surfaces, and any
additional hardware used, is capable of supporting the loudspeaker. Any hardware used to
suspend a loudspeaker array that is not provided by/associated with Bosch is the
responsibility of others.
!
Caution!
The seismic tab (auxiliary support ring) is not intended for primary suspension of the
loudspeaker. The seismic tab should only be used as a secondary safety point.
!
Caution!
Ceiling mount speaker’s safety cable
The safety cable should be installed with a minimum of 3-inches (76.2 mm) of slack.
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Welcome
Thank you for purchasing Bosch loudspeakers. Read through this manual to familiarize
yourself with features, applications, and precautions before you use these products.
Bosch loudspeakers use innovative design and materials to provide premium-level
performance in a flush-mount ceiling format. Four models comprise by Bosch: the LC2-
PC30G6-4 with a 4-inch LF driver and a .75-inch, titanium-coated tweeter with waveguide; the
LC2-PC30G6-8 with an 8-inch LF driver and a 1-inch titanium-coated tweeter with waveguide;
the LC2-PC60G-8H with a fully waveguide-loaded 8-inch LF driver and a 1-inch titanium coated
tweeter; and the LC2-PC60G6-10 , a true ceiling-mounted subwoofer designed to augment and
extend the full-range model’s low-frequency response.
Important Features
– Model for model, has superior performance to competing brands
– Comes with both 70V/100V or 8-ohm operation standard on every model
– Includes all installation accessories commonly needed for most jobs
– Designed for use in voice alarm systems
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System overview
Model Summary
LC2-PC30G6-4
Perfect for conventional rooms. It has excellent bandwidth in an esthetically very unobtrusive
installation profile. Its compact design fits in tight areas. Its 4-inch woofer and waveguide-
coupled, titanium-coated dome tweeter give smooth, wide frequency response. The enclosure
is ported and tuned to provide surprising bass response in such a compact package. Features
an easy 3-point mounting system for quick installations.
LC2-PC30G6-8
The LC2-PC30G6-8 has a specially tuned enclosure and 8-inch woofer to provide amazing bass
response. The 1-inch waveguide-coupled tweeter gives smooth controlled coverage out to 20
kHz. Perfect for installations where a flush-mount design is desired but demand for high-
quality audio exists. Features a 4-point mounting system to make installations fast and easy.
LC2-PC30G6-8L
The LC2-PC30G6-8L is the same as the LC2-PC30G6-8 but in a low-profile installation
package. Ideal for tight ceiling spaces.
LC2-PC60G-8H
The LC2-PC60G-8H is ideal for high ceilings and reverberant “problem” rooms. Its exclusive
ported, waveguide-coupled, 8-inch driver provides excellent intelligibility and definition. The
8.2HC’s patent pending design provides great coverage control throughout the voice range
and above. No other ceiling speaker system provides the combination of excellent pattern
control, wide bandwidth, high power handling, and compact design like the LC2-PC60G-8H.
LC2-PC60G6-10
The LC2-PC60G6-10 packs a 10-inch subwoofer in a tuned high performance enclosure to give
amazing low frequency performance down to 45 Hz! It is one of the few quick-mount ceiling
TRUE subwoofers available. Flexible installation and powerful low-end performance make it
the ideal mate to any Bosch ceiling model.
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Packing List
Item Quantity Part
A 2 Speaker system
B 4 Tile rails
C 2 C-ring support
D 2 Grille
E 1 Owner’s manual
F 4 Support ring screws
G 1 Cutout template
H 2 Paint shield
Figure 1: Packing list
3.2
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Product Feature Identification
1
2
3
4
Figure 2: Bottom of speaker Figure 3: Top of speaker
Item Description Item Description
1 Steel back can 5 Rotating mounting tabs
2 Mounting screws 6 Ceramic connector
3 Tap selector 7 Seismic tab (auxiliary support ring)
4 Grille safety tether hole 8 Grille safety tether
Bosch Ceiling Series Systems (sold in pairs)
Model Part No Description
LC2-PC30G6-4 4" coaxial speaker with horn-loaded, Ti-coated tweeter
LC2-PC30G6-8 8" coaxial speaker with horn-loaded, Ti-coated tweeter
LC2-PC30G6-8L Same as C8.2 above except with low-profile backcan
LC2-PC60G-8H 8" waveguide-coupled coaxial speaker with horn-loaded, Ti-coated tweeter
LC2-PC60G6-10 10" High performance subwoofer
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Installation and Wiring
The Bosch mounting system has been designed so that, if necessary, the installation can be
done from beneath the ceiling. In some cases with a suspended ceiling grid, however, it may
be easier to access from both the top and bottom of the ceiling tile during the installation
process. Typical installation hardware needed for either suspended ceilings or sheetrock
ceilings is included. The ceiling speaker assembly is held in place by mounting tabs that
securely grip the ceiling material. Input wiring is attached to a removable terminal block
connector that can be prewired if necessary before speaker installation to speed up the
installation process.
Step 1 — Cut the Hole
For suspended tile or sheetrock ceilings, cut out the hole either by tracing the cardboard
template or with a circular cutter set to the appropriate cutout size. If the wire has been pre-
installed, pull the wiring through the cutout hole.
Figure 4: Cut ceiling hole
Step 2 — Install C-Ring and/or Tile Rails
All Bosch speakers come packaged with two types of backing hardware: a C-ring and two tile
rails. For suspended ceiling installations, insert the C-ring through the hole cut in the ceiling
tile. Place the C-ring around the hole with the tabs located as shown in Figure 5. Insert the tile
rails through the cut hole in the ceiling tile. Snap the two rails into the two tabs in the C-ring
and align the rails so that the ends extend OVER the T-channel grid on the side of the tile.
Secure the rails onto the C-ring tabs by inserting a screw though each tab into the rail, as
shown in Figure 5.
Figure 5: Secure rails to C-Ring
INSTALLATION NOTE: TILE RAILS AND C-RING
Each speaker comes with two tile rails which are designed to fit either standard 24-inch-wide
or 600-mm-wide tiles. It is important to note that the tile rail pieces do not actually attach to
the T-grid struts. The ends of the rails sit OVER the T-grid strut. Normally, the tile supports the
rails. The tile rails are pre-punched at regular intervals with holes along their length. This
allows the C-ring to be positioned at any point along the rail. If the tile comes out or falls
apart, the ends of the support rails fall onto the T-grid, which prevents the speaker assembly
from falling.
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4.1
4.2
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Always use all included support hardware when installing into suspended ceiling tiles to make
sure the installation is secure.
For sheetrock ceiling installations, the C-ring should be used by itself to reinforce the ceiling
material and to spread out the pressure from the speaker hold-down tabs. Guide the C-ring
through the cut hole in the ceiling, and place it on the back side of the hole before inserting
the speaker.
Step 3 — Attach Wiring to the Ceramic Connector
Insert the bare end of wire into the appropriate connector terminals as described below and
screw down the hold-down screw until tight, using a small screwdriver.
Figure 6:Tighten with screwdriver
When adding a subwoofer, be sure to observe the correct polarity. The LC2-PC60G6-10
subwoofer has been designed for optimum performance when used with the LC2-PC30G6-4.
In order to maximize the low frequency output when used with the LC2-PC30G6-8, LC2-
PC30G6-8L or LC2-PC60G-8H, the polarity of the LC2-PC60G6-10 subwoofer should be
reversed. See Figures 7 and 8.
Figure 7: Subwoofer polarity with LC2-PC30G6-4
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Figure 8: Subwoofer polarity with LC2-PC30G6-8/LC2-PC60G-8H/LC2-PC30G6-8L
Step 4 — Mount the Speaker into the Ceiling
Push the speaker into the ceiling hole until the front baffle rim is flush with the ceiling. Tighten
the mounting tabs by turning the screw clockwise until the speaker is secure. Please note that
the first clockwise quarter-turn rotates the attachment tabs outward. The remaining turns
tighten the tabs down onto the back of the ceiling surface (see Figure 10).
Figure 9: Mount speaker into ceiling
!<=8 in. lbs.
(0.9 Nm)
Figure 10: Tighten mounting tabs
Step 5 — Connect an Auxiliary Support Line
Note the support ring on the back of the speaker. The ring allows for connection to a
independent and secure anchor point. Construction codes often require the use of this
secondary support point.
4.4
4.5
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!
Caution!
Ceiling mount speaker’s safety cable
The safety cable should be installed with a minimum of 3-inches (76.2 mm) of slack.
Figure 11: Attach auxiliary support
Step 6 — Adjust Tap Selector
The tap selector switch is located on the front baffle. Adjust the speaker to the appropriate
tap setting before installing the grille. In some 70V/100V constant voltage installations it is
advisable to leave the grilles off if final speaker audio level balance adjustments are to be
made later. After the levels are adjusted the grilles can then be installed.
Figure 12: Adjust tap selector (left: LC2-PC30G6-4/LC2-PC30G6-8/LC2-PC30G6-8L; right:
LC2-PC60G6-10/LC2-PC60G-8H
LC2-PC30G6-4, LC2-PC30G6-8, and LC2-PC30G6-8L
In addition to the 8-ohm setting, the power taps are 30 W, 15 W, 7.5 W, and 3.7 W at both
70.7V and 100V, with a 1.8 W tap for 70.7V only.
LC2-PC60G-8H and LC2-PC60G6-10
In addition to the 8-ohm setting, the power taps are 60 W, 30 W, and 15 W at both 70.7V and
100V, with a 7.5 W tap for 70.7V only.
Step 7 — Attach the Grille
INSTALLATION NOTE: GRILLE SAFETY FEATURE
Bosch grilles features a unique safety tether to prevent the grille from falling if the grille is
removed or comes loose after installation.
First, install the grille’s safety tether by pushing the grille fastener into the hole in the front of
the baffle (see Figure 13). Second, press the grille into place until the front of the grille is
flush with the rim of the baffle. Make sure the grille is securely seated to prevent it from
vibrating loose.
4.6
4.7
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If you need to remove the grille, the easiest way is to insert two bent paper clips or other
pointed objects into holes in the grille, then apply slow even pressure to pull down on the
grille until that section of the grille comes out slightly. Continue the same procedure around
the perimeter of the grille, loosening a portion at a time until the grille is removed.
1
2
Figure 13: Attach the grille
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Troubleshooting
Problem Possible Causes Action
No output Amplifier Ensure the amplifier channel is being fed an input signal (preferably
via a signal input indicator on the amplifier).
Verify the amplifier channel’s volume is turned up.
Connect the loudspeaker and cable, which had no output to another
amplifier channel, ensuring an input signal is fed to the new amplifier
channel. If you then get output, the problem was the amplifier
channel. If not, then the problem is either the cable or the
loudspeaker.
Loudspeaker
cables(s)
Replace the cable(s) connecting the loudspeaker system and
amplifier.
Questionable or
intermittent output,
such as crackling
Faulty connection Ensure all cabling for proper connector contact. A bad connection can
result in intermittent contact or dramatically increased resistance,
which in turn can cause reduces output or noises unrelated to the
signal.
Improper power
tap setting
Verify the power tap setting under the loudspeaker grille is
appropriate for the installation and amplifier chosen.
Constant noise
such as buzzing,
hissing, or
humming
A faulty electronic
device in the signal
chain
Loudspeakers cannot generate these sounds by themselves; you may
have a faulty electronic device in the signal chain.
Poor system
grounding
Check and correct the system grounding, as required.
Poor low-frequency
output
Out-of-polarity
hookup between
multiple
loudspeakers
When two (2) loudspeakers are hooked up out of polarity (out of
phase), the low frequencies cancel each other out. Try reversing the
polarity of one (1) of the loudspeakers either by turning around a
dual-banana plug at the amplifier or by reversing the tip/sleeve leads
on the jack. Which ever condition results in greater low-frequency
output is the in-polarity condition.
If these suggestions do not solve your problem, contact your nearest dealer or distributor.
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Technical data
LC2-PC30G6-4 and LC2-PC30G6-8
Specification LC2-PC30G6-4 LC2-PC30G6-8
Dimensions (depth x diam.) 6.9 in x 7.1 in (176 mm x 181 mm) 10.0 in x 10.6 in (255 mm x 270
mm)
Bezel diameter 8.3 in (210 mm) 11.8 in (300 mm)
Weight 6 lb (2.7 kg) 11 lb (5.0 kg)
Cabinet construction Steel enclosure and UL94V-0 rated baffle and bezel
LF transducer 4 in (100 mm) high-compliance
driver (weatherized cone)
8 in (205 mm) high-compliance
driver (weatherized cone)
HF transducer 0.75 in (19 mm) Ti-coated dome 1 in (25 mm) Ti-coated dome
Mounting system Integrated 3-point toggle anchors Integrated 4-point toggle anchors
Available colors White (paintable)
Grille construction Powder–coated steel
Acoustic design Ported cabinet, two-way design, internally damped, w/passive
crossover
Frequency response 65 Hz–20 kHz 50 Hz–20 kHz
Power handling (@ 8Ω)50 W (with overload protection) 75 W (with overload protection)
Coverage pattern 130° conical 110° conical
Sensitivity (SPL 1 W/1 m) 86 dB 91 dB
Input configuration 8Ω; 70V/100V
70V/100V power taps 1.8 (70V only)/3.7/7.5/15/30 W
Included accessories Tile bridge, mounting ring
LC2-PC30G6-8L and LC2-PC60G-8H
Specification LC2-PC30G6-8L LC2-PC60G-8H
Dimensions (depth x diam.) 7.0 in x 10.6 in (190 mm x 255
mm)
11.9 in x 12.6 in (303 mm x 320
mm)
Bezel diameter 11.8 in (300 mm) 13.8 in (350 mm)
Weight 11 lb (5.0 kg) 13.2 lb (6.0 kg)
Cabinet construction Steel enclosure and UL94V-0 rated baffle and bezel
LF transducer 8 in (205 mm) high-compliance driver (weatherized cone)
HF transducer 1 in (25 mm) Ti-coated dome
Mounting system Integrated 4-point toggle anchors
Available colors White (paintable)
Grille construction Powder–coated steel
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Specification LC2-PC30G6-8L LC2-PC60G-8H
Acoustic design Ported cabinet, two-way design,
internally damped, w/passive
crossover
Ported cabinet, waveguide-
coupled, two-way design,,
internally damped, w/passive
crossover
Frequency response 50 Hz–20 kHz
Power handling (@ 8Ω)75 W (with overload protection)
Coverage pattern 110° conical 75° conical
Sensitivity (SPL 1 W/1 m) 91 dB 93 dB
Input configuration 8Ω; 70V/100V
70V/100V power taps 1.8 (70V only)/3.7/7.5/15/30 W 7.5 (70V only)/15/30/60 W
Included accessories Tile bridge, mounting ring
LC2-PC60G6-10
Specification LC2-PC60G6-10
Dimensions (depth x diam.) 11.9 in x 12.6 in (303 mm x 320 mm)
Bezel diameter 13.8 in (350 mm)
Weight 15.5 lb (7.0 kg)
Cabinet construction Steel enclosure and UL94V-0 rated baffle and bezel
LF transducer 10 in (260 mm) high-compliance driver (weatherized cone)
Mounting system Integrated 4-point toggle anchors
Available colors White (paintable)
Grille construction Powder–coated steel
Acoustic design Ported cabinet, internally damped w/passive crossover
Frequency response 45 Hz–150 kHz
Power handling (@ 8Ω)100 W (with overload protection)
Sensitivity (SPL 1 W/1 m) 94 dB
Input configuration 8Ω; 70V/100V
70V/100V power taps 7.5 (70V only)/15/30/60 W
Included accessories Tile bridge, mounting ring
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2016.05 | 12 | Installation and User Instructions Bosch Security Systems B.V.

Appendices
Appendix A Painting the Speaker
If the speaker is installed in an area where the interior design requires a color match, these
speakers are simple to paint. The speakers can accommodate almost any type of latex or oil-
based paint. The bezel/rim can be painted before installation or after mounting into the
ceiling.
Painting Process
Clean the rim and grille with mineral spirits or other light solvent. Do not use harsh solvents
such as gasoline, kerosene, acetone, or other chemicals. If you use these cleaners you may
permanently damage the enclosure. Also, don’t use abrasives products such as sandpaper or
steel wool.
Either by rolling or spraying, apply two or more thin coats of paint. If you are spraying, hold
the spray can at the angles shown in Figure 14.
45˚ 45˚
180˚
180˚
Baffle Can
(do not
paint)
Figure 14: Spray-painting angles
If you are painting the grille also, you must first remove the internal grille cloth. Spray painting
is strongly recommended. If the grille is rolled or brush painted, the grille may become
clogged with paint and the sound quality will suffer. After the paint has dried, replace the
internal grille cloth.
If you wish to paint the speaker along with the ceiling after installation, insert a plastic or
cardboard paint shield into the front of the speaker to mask the drivers and internal baffle,
paint the speaker, and then remove the shield. Do not paint the steel back can.
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Bosch Security Systems B.V.
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5617 BA Eindhoven
Netherlands
www.boschsecurity.com
© Bosch Security Systems B.V., 2016