Bosch Appliances Speaker LC2 PC30G6 4 User Manual

Bosch Prosound Ceiling Speakers  
Installation and User Instructions  
en LC2-PC30G6-4  
LC2-PC30G6-8  
LC2-PC30G6-8L  
LC2-PC60G6-8H  
LC2-PC60G6-10  
 
Table of Contents  
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Safety First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Important Features . . . . . . . . . . . . . . . . . . . . . . . . 1  
Model Summary . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Packing List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Product Feature Identification. . . . . . . . . . . . . . . . 3  
Installation and Wiring . . . . . . . . . . . . . . . . . . . . . 4  
Step 1 — Cut the Hole . . . . . . . . . . . . . . . . . . 4  
Step 2 — Install C-Ring  
and/or Tile Rails . . . . . . . . . . . . . . . . . . . . . 4  
Step 3 — Attach Wiring to the  
Ceramic Connector . . . . . . . . . . . . . . . . . . . 5  
Step 4 — Mount the Speaker into the  
Ceiling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Step 5 — Connect an Auxiliary  
Support Line . . . . . . . . . . . . . . . . . . . . . . . . 6  
Step 6 — Adjust Tap Selector. . . . . . . . . . . . . . 6  
Step 7 — Attach the Grille. . . . . . . . . . . . . . . . 7  
Appendix A — Painting the Speaker. . . . . . . . . . . 8  
Appendix B — Product Specifications . . . . . . . . 10  
Bosch Security Systems | 2008-05  
 
Welcome/Safety/Important Features  
Welcome  
Important Features  
Thank you for purchasing Bosch loudspeakers. Read  
through this manual to familiarize yourself with fea-  
tures, applications, and precautions before you use  
these products.  
Model for model, has superior performance to  
competing brands  
Comes with both 70V/100V or 8-ohm operation  
standard on every model  
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-PC60G6-8H with a fully wave-  
guide-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.  
Includes all installation accessories  
commonly needed for most jobs  
Designed for use in voice alarm systems.  
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 rec-  
ommends that the system be inspected at least once  
a year. If any sign of weakness or damage is detect-  
ed, remedial action should be taken immediately.  
The user is responsible for making sure that the sup-  
porting surfaces, and any additional hardware used,  
is capable of supporting the loudspeaker. Any hard-  
ware used to suspend a loudspeaker array that is not  
provided by/associated with Bosch is the responsibil-  
ity of others.  
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1
 
Model Summary/Packing List  
LC2-PC30G6-4  
Packing List (Figure 1)  
Perfect for conventional rooms. It has excellent  
bandwidth in an esthetically very unobtrusive instal-  
lation 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 pro-  
vide surprising bass response in such a compact  
package. Features an easy 3-point mounting system  
for quick installations.  
Figure Quantity  
Part  
A
B
C
D
E
F
2
4
2
2
1
4
1
2
Speaker system  
Tile rails  
C-ring support  
Grille  
Owner’s manual  
Support ring screws  
Cutout template  
Paint Shield  
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 give smooth  
controlled coverage out to 20 kHz. Perfect for installa-  
tions where a flush-mount design is desired but demand  
for high-quality audio exists. Features a 4-point mount-  
ing system to make installations fast and easy.  
G
H
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.  
A (x2)  
E
LC2-PC60G6-8H  
C(x2)  
The LC2-PC60G6-8H is ideal for high ceilings and  
reverberant “problem” rooms. Its exclusive ported, wave-  
guide-coupled, 8-inch driver provides excellent intelligi-  
bility and definition. The LC2-PC60G6-8H patent-  
pending design provides great coverage control through-  
out 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-PC60G6-8H.  
D (x2)  
G
F(x4)  
B(x4)  
LC2-PC60G6-10  
H(x2)  
The LC2-PC60G6-10 packs a 10-inch subwoofer in  
a tuned high performance enclosure to give amazing  
low frequency performance down to 45Hz! 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 ceiling  
model.  
Figure 1: packing list  
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Product Feature Identification  
Bosch Ceiling Series Systems (sold in pairs)  
Model  
Description  
LC2-PC30G6-4  
LC2-PC30G6-8  
4" coaxial speaker with horn-loaded, Ti-coated tweeter  
8" coaxial speaker with horn-loaded, Ti-coated tweeter  
LC2-PC30G6-8L Same as LC2-PC30G6-8 above except with low-profile backcan  
LC2-PC60G6-8H 8" waveguide-coupled coaxial speaker with horn-loaded, Ti-coated tweeter  
LC2-PC60G6-10 10" High performance subwoofer  
Product Feature Identification  
Steel  
backcan  
Ceramic connector  
Seismic tab  
(auxiliary support ring)  
Grille safety tether  
Grille  
Tap  
selector  
Mounting  
screws  
Grille safety  
tether hole  
Rotating mounting tabs  
Figure 2: Bottom of speaker  
Figure 3: Top of speaker  
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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 ceil-  
ings is included. The ceiling speaker assembly is held  
in place by mounting tabs that securely grip the ceil-  
ing material. Input wiring is attached to a removable  
terminal block connector that can be pre-wired if nec-  
essary before speaker installation to speed up the  
installation process.  
Step 1: Cut the Hole (Figure 4)  
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 (Figure 5)  
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  
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Installation and Wiring  
INSTALLATION NOTE: TILE RAILS AND  
C-RING  
When adding a subwoofer, be sure to observe the cor-  
rect 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-PC60G6-8H,  
the polarity of the LC2-PC60G6-10 subwoofer  
should be reversed. See Figures 7 and 8.  
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.  
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.  
LC2-PC60G6-10 Subwoofer LC2-PC30G6-4 Loudspeaker  
Figure 7: Subwoofer polarity with  
LC2-PC30G6-4  
Step 3: Attach Wiring to the  
Ceramic Connector (Figure 6)  
Insert the bare end of wire into the appropriate con-  
nector terminals as described below and screw down  
the hold-down screw until tight, using a small  
screwdriver.  
LC2-PC60G6-10 Subwoofer  
LC2-PC30G6-8/  
LC2-PC60G6-8H/LC2-PC30G6-8L-  
Loudspeaker  
Figure 8: Subwoofer polarity with LC2-  
PC30G6-8/LC2-PC60G6-8H/  
LC2-PC30G6-8L  
Figure 6: Tighten with screwdriver  
~
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Installation and Wiring  
INSTALLATION NOTE: CEILING TILE  
CAUTION  
INSTALLATION NOTE: MOUNTING TABS  
For each attachment screw, first turn one half-turn  
counterclockwise to release the mounting tab from  
its guide.  
When mounting the units into 2'˘2' or 2'˘4' sus-  
pended ceiling tiles, DO NOT install them in light-  
weight fibreglass-type tiles without full secondary  
support for the speaker as noted in Step 6. Such tiles  
are not designed to support any substantial weight.  
Speaker installation without secondary support will  
cause the tile to sag and distort, even with the tile  
bridge installed. The secondary support line at the  
rear of the speaker MUST be strung taut in these sit-  
uations and MUST remove most of the force of the  
speaker on the tile to ensure that the speaker does  
not deform the tile.  
Step 5: Connect an Auxiliary  
Support Line (Figure 11)  
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.  
Step 4: Mount the Speaker Into  
the Ceiling (Figure 9)  
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.  
Figure 11: Attach auxiliary support line  
Please note that the first  
clockwise quarter-turn  
rotates the attachment  
Step 6: Adjust Tap Selector  
(Figure 12)  
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 con-  
stant voltage installations it is advisable to leave the  
grilles off if final speaker audio level balance adjust-  
ments are to be made later. After the levels are  
adjusted the grilles can then be installed.  
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  
Figure 12: Adjust tap selector  
(left: LC2-PC30G6-4/LC2-PC30G6-8/  
LC2-PC30G6-8L; right: LC2-PC60G6-10/  
LC2-PC60G6-8H)  
Figure 10: Tighten mounting tabs  
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Installation and Wiring  
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-PC60G6-8H 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 (Figure 13)  
INSTALLATION NOTE:  
GRILLE SAFETY FEATURE  
Bosch grilles features a unique safety tether to pre-  
vent 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.  
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 proce-  
dure around the perimeter of the grille, loosening a  
portion at a time until the grille is removed.  
1
2
Figure 13: Attach the grille  
Bosch Security Systems | 2008-05  
 
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Appendix A — Painting the Speaker  
If the speaker is installed in an area where the inte-  
rior 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.  
180˚  
45˚  
45˚  
Baffle  
180˚  
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,  
then remove the shield.  
Bosch Security Systems | 2008-05  
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Appendix B — Product Specifications  
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Appendix B — Product Specifications  
Bosch Security Systems | 2008-05  
 
10  

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