Bosch Prosound Ceiling Speakers

Installation and User Instructions

LC2-PC30G6-4LC2-PC30G6-8LC2-PC30G6-8LLC2-PC60G6-8HLC2-PC60G6-10

en

Bosch Prosound Ceiling Speakers

Bosch Security Systems | 2008-05

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

Table of Contents

WelcomeThank you for purchasing Bosch loudspeakers. Readthrough this manual to familiarize yourself with fea-tures, applications, and precautions before you usethese products.

Bosch loudspeakers use innovative design andmaterials to provide premium-level performance in aflush-mount ceiling format. Four models compriseby Bosch: the LC2-PC30G6-4 with a 4-inch LFdriver and a .75-inch, titanium-coated tweeter withwaveguide; the LC2-PC30G6-8 with an 8-inch LFdriver and a 1-inch titanium-coated tweeter withwaveguide; the LC2-PC60G6-8H with a fully wave-guide-loaded 8-inch LF driver and a 1-inch titaniumcoated tweeter; and the LC2-PC60G6-10, a trueceiling-mounted subwoofer designed to augment andextend the full-range model’s low-frequencyresponse.

Safety FirstSuspending any object is potentially dangerous

and should only be attempted by individuals whohave a thorough knowledge of the techniques andregulations of rigging objects overhead. Boschstrongly recommends that all speakers be suspendedtaking into account all current national, federal,state and local regulations. It is the responsibility ofthe installer to ensure that all speakers are safelyinstalled in accordance with all such regulations.When speakers are suspended, Bosch strongly rec-ommends that the system be inspected at least oncea 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 notprovided by/associated with Bosch is the responsibil-ity of others.

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.

Bosch Security Systems | 2008-05 1

Welcome/Safety/Important Features


Model Summary/Packing List

Figure 1: packing list

LC2-PC30G6-4Perfect for conventional rooms. It has excellentbandwidth 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 frequencyresponse. The enclosure is ported and tuned to pro-vide surprising bass response in such a compactpackage. Features an easy 3-point mounting systemfor quick installations.

LC2-PC30G6-8The LC2-PC30G6-8 has a specially tuned enclosureand 8-inch woofer to provide amazing bass response.The 1-inch waveguide-coupled tweeter give smoothcontrolled coverage out to 20 kHz. Perfect for installa-tions where a flush-mount design is desired but demandfor high-quality audio exists. Features a 4-point mount-ing system to make installations fast and easy.

LC2-PC30G6-8LThe LC2-PC30G6-8L is the same as the LC2-PC30G6-8 but in a low-profile installation package.Ideal for tight ceiling spaces.

LC2-PC60G6-8HThe LC2-PC60G6-8H is ideal for high ceilings andreverberant “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 speakersystem provides the combination of excellent patterncontrol, wide bandwidth, high power handling, andcompact design like the LC2-PC60G6-8H.

LC2-PC60G6-10The LC2-PC60G6-10 packs a 10-inch subwoofer ina tuned high performance enclosure to give amazinglow frequency performance down to 45Hz! It is oneof the few quick-mount ceiling TRUE subwoofersavailable. Flexible installation and powerful low-endperformance make it the ideal mate to any ceilingmodel.

Packing List (Figure 1)Figure 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

A (x2)

C(x2)

D (x2)

F(x4)

B(x4)

G

H (x2)

E


Bosch Ceiling Series Systems (sold in pairs)

Model 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 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

Product Feature Identification

Grille safety tether

Grille

Seismic tab(auxiliary support ring)

Ceramic connector

Rotating mounting tabs

Figure 3: Top of speaker

Steelbackcan

Mountingscrews

Tapselector

Grille safetytether hole

Figure 2: Bottom of speaker

The Bosch mounting system has been designed sothat, if necessary, the installation can be done frombeneath the ceiling. In some cases with a suspendedceiling grid, however, it may be easier to access fromboth the top and bottom of the ceiling tile during theinstallation process. Typical installation hardwareneeded for either suspended ceilings or sheetrock ceil-ings is included. The ceiling speaker assembly is heldin place by mounting tabs that securely grip the ceil-ing material. Input wiring is attached to a removableterminal block connector that can be pre-wired if nec-essary before speaker installation to speed up theinstallation process.

Step 1: Cut the Hole (Figure 4)For suspended tile or sheetrock ceilings, cut out thehole either by tracing the cardboard template orwith a circular cutter set to the appropriate cutoutsize. If the wire has been pre-installed, pull thewiring through the cutout hole.

Figure 4: Cut ceiling hole

Step 2: Install C-Ring and/or TileRails (Figure 5)All Bosch speakers come packaged with two types ofbacking hardware: a C-ring and two tile rails.

For suspended ceiling installations, insert the C-ring through the hole cut in the ceiling tile. Placethe C-ring around the hole with the tabs located asshown in Figure 5. Insert the tile rails through thecut hole in the ceiling tile. Snap the two rails intothe two tabs in the C-ring and align the rails so thatthe ends extend OVER the T-channel grid on theside of the tile. Secure the rails onto the C-ring tabsby inserting a screw though each tab into the rail, asshown in Figure 5.

Figure 5: Secure rails to C-Ring


Installation and Wiring



INSTALLATION NOTE: TILE RAILS AND C-RINGEach speaker comes with two tile rails which aredesigned to fit either standard 24-inch-wide or 600-mm-wide tiles. It is important to note that the tile railpieces do not actually attach to the T-grid struts. Theends 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 theirlength. This allows the C-ring to be positioned at anypoint along the rail. If the tile comes out or fallsapart, the ends of the support rails fall onto the T-grid, which prevents the speaker assembly fromfalling.

Always use all included support hardware wheninstalling into suspended ceiling tiles to make surethe installation is secure.

For sheetrock ceiling installations, the C-ringshould be used by itself to reinforce the ceilingmaterial and to spread out the pressure from thespeaker hold-down tabs. Guide the C-ring throughthe cut hole in the ceiling, and place it on the backside of the hole before inserting the speaker.

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 downthe hold-down screw until tight, using a smallscrewdriver.

Figure 6: Tighten with screwdriver

When adding a subwoofer, be sure to observe the cor-rect polarity. The LC2-PC60G6-10 subwoofer hasbeen designed for optimum performance when usedwith the LC2-PC30G6-4. In order to maximize thelow frequency output when used with the LC2-PC30G6-8, LC2-PC30G6-8L or LC2-PC60G6-8H,the polarity of the LC2-PC60G6-10 subwoofershould be reversed. See Figures 7 and 8.

~

Screwdriver

LC2-PC60G6-10 Subwoofer LC2-PC30G6-4 Loudspeaker

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 7: Subwoofer polarity with LC2-PC30G6-4


INSTALLATION NOTE: CEILING TILE CAUTIONWhen 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 secondarysupport for the speaker as noted in Step 6. Such tilesare not designed to support any substantial weight.Speaker installation without secondary support willcause the tile to sag and distort, even with the tilebridge installed. The secondary support line at therear of the speaker MUST be strung taut in these sit-uations and MUST remove most of the force of thespeaker on the tile to ensure that the speaker doesnot deform the tile.

Step 4: Mount the Speaker Intothe Ceiling (Figure 9)Push the speaker into the ceiling hole until the front

baffle rim is flush withthe ceiling. Tighten themounting tabs by turningthe screw clockwise untilthe speaker is secure.Please note that the firstclockwise quarter-turnrotates the attachmenttabs outward. Theremaining turns tightenthe tabs down onto theback of the ceiling surface(see Figure 10).

INSTALLATION NOTE: MOUNTING TABSFor each attachment screw, first turn one half-turncounterclockwise to release the mounting tab fromits guide.

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 independentand secure anchor point. Construction codes oftenrequire the use of this secondary support point.

Step 6: Adjust Tap Selector (Figure 12)The tap selector switch is located on the front baffle.Adjust the speaker to the appropriate tap settingbefore installing the grille. In some 70V/100V con-stant voltage installations it is advisable to leave thegrilles off if final speaker audio level balance adjust-ments are to be made later. After the levels areadjusted the grilles can then be installed.


Figure 11: Attach auxiliary support line

Figure 12: Adjust tap selector (left: LC2-PC30G6-4/LC2-PC30G6-8/LC2-PC30G6-8L; right: LC2-PC60G6-10/LC2-PC60G6-8H)

Figure 9: Mountspeaker into ceiling

Figure 10: Tighten mounting tabs

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 and100V, 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 are60 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 FEATUREBosch grilles features a unique safety tether to pre-vent the grille from falling if the grille is removed orcomes loose after installation.

First, install the grille’s safety tether by pushingthe grille fastener into the hole in the front of thebaffle (see Figure 13). Second, press the grille intoplace until the front of the grille is flush with therim of the baffle. Make sure the grille is securelyseated to prevent it from vibrating loose.

If you need to remove the grille, the easiest way isto insert two bent paper clips or other pointed objectsinto holes in the grille, then apply slow even pressureto pull down on the grille until that section of thegrille comes out slightly. Continue the same proce-dure around the perimeter of the grille, loosening aportion at a time until the grille is removed.



1

2

Figure 13: Attach the grille

If the speaker is installed in an area where the inte-rior design requires a color match, these speakersare simple to paint. The speakers can accommodatealmost any type of latex or oil-based paint. Thebezel/rim can be painted before installation or aftermounting into the ceiling.

Painting ProcessClean the rim and grille with mineral spirits orother light solvent. Do not use harsh solvents suchas gasoline, kerosene, acetone, or other chemicals. Ifyou use these cleaners you may permanently damagethe enclosure. Also, don’t use abrasives productssuch as sandpaper or steel wool.

Either by rolling or spraying, apply two or morethin coats of paint. If you are spraying, hold thespray can at the angles shown in Figure 14.

If you are painting the grille also, you must firstremove the internal grille cloth. Spray painting isstrongly recommended. If the grille is rolled orbrush painted, the grille may become clogged withpaint and the sound quality will suffer. After thepaint has dried, replace the internal grille cloth.

If you wish to paint the speaker along with theceiling after installation, insert a plastic or cardboardpaint shield into the front of the speaker to maskthe drivers and internal baffle, paint the speaker,then remove the shield.


45˚ 45˚

180˚

180˚

BaffleCan(do notpaint)

Figure 14: Spray-painting angles

Appendix A — Painting the Speaker


Spec

ifica

tion

LC2-

PC30

G6-

4LC

2-PC

30G

6-8

LC2-

PC30

G6-

8LLC

2-PC

60G

6-8H

LC2-

PC60

G6-

10D

imen

sion

s6.

9"x

7.1"

10.0

"x10

.6"

7.0"

x10

.6"

11.9

"x12

.6"

11.9

"x12

.6"

(dep

thx

diam

.)(1

76x

181

mm

)(2

55x

270

mm

)(1

90x

255

mm

)(3

03x

320

mm

)(3

03x

320

mm

)

Beze

ldia

met

er8.

3"(2

10m

m)

11.8

"(30

0m

m)

11.8

"(30

0m

m)

13.8

"(35

0m

m)

13.8

"(35

0m

m)

Wei

ght

6lb

s(2

.7kg

)11

lbs

(5.0

kg)

11lb

s(5

.0kg

)13

.2lb

s(6

.0kg

)15

.5lb

s(7

.0kg

)

Cab

inet

Stee

lenc

losu

rean

dSt

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nclo

sure

and

Stee

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dSt

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sure

and

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dco

nstru

ctio

nUL

94V-

0ra

ted

baffl

eUL

94V-

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ted

baffl

eUL

94V-

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ted

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Appendix B — Product Specifications


Appendix B — Product SpecificationsSp

ecifi

catio

nLC

2-PC

30G

6-4

LC2-

PC30

G6-

8LC

2-PC

30G

6-8L

LC2-

PC60

G6-

8HLC

2-PC

60G

6-10

Freq

uenc

y65

Hz–2

0kH

z50

Hz–2

0kH

z50

Hz–2

0kH

z50

Hz–2

0kH

z45

Hz–1

50Hz

resp

onse

Pow

erha

ndlin

g50

W(w

ith75

W(w

ith75

W(w

ith75

W(w

ith10

0W

(with

(@8ΩΩ

)ov

erlo

ad p

rote

ctio

n)ov

erlo

ad p

rote

ctio

n)ov

erlo

ad p

rote

ctio

n)ov

erlo

ad p

rote

ctio

n)ov

erlo

ad p

rote

ctio

n)

Cov

erag

e pa

ttern

130°

con

ical

110°

con

ical

110°

con

ical

75° c

onica

lN/

A

Sens

itivi

ty86

dB

91 d

B91

dB

93 d

B94

dB

(SPL

1 W

/1 m

)

Inpu

t 8Ω

; 70V

/100

V8Ω

; 70V

/100

V8Ω

; 70V

/100

V8Ω

; 70V

/100

V8Ω

; 70V

/100

Vco

nfig

urat

ion

70V/

100V

1.8

(70V

onl

y)/

1.8

(70V

onl

y)/

1.8

(70V

onl

y)/

7.5

(70V

onl

y)/

7.5

(70V

onl

y)/

pow

er ta

ps3.

7/7.

5/15

/30W

3.7/

7.5/

15/3

0W3.

7/7.

5/15

/30W

15/3

0/60

W15

/30/

60 W

Incl

uded

Tile

brid

ge,

Tile

brid

ge,

Tile

brid

ge,

Tile

brid

ge,

Tile

brid

ge,

acce

ssor

ies

mou

ntin

g rin

gm

ount

ing

ring

mou

ntin

g rin

gm

ount

ing

ring

mou

ntin

g rin

g

For more information visit

www.boschsecuritysystems.com

© Bosch Security Systems B.V.

Data subject to change without notice

2008-05 | en

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