Welcome

Thank you for purchasing Bosch loudspeakers. Read through this manual to familiarize yourself with fea- tures, 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-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.

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.

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.

LC2-PC30G6-4

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.

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.

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-PC60G6-8H

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.

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 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.

Packing List (Figure 1)

Figure 1: packing list

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.

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.

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 (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.

Figure 6: Tighten with screwdriver

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.

FigureLC2-PC60G67:-10 Subwoofer LC2-PC30G6-4 Loudspeaker

Subwoofer polarity with

LC2-PC30G6-4

Figure 8:Loudspeaker

Subwoofer polarity with LC2- PC30G6-8/LC2-PC60G6-8H/ LC2-PC30G6-8L

~

INSTALLATION NOTE: CEILING TILE

CAUTION

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 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

INSTALLATION NOTE: MOUNTING TABS

For each attachment screw, first turn one half-turn counterclockwise to release the mounting tab from its 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 independent and secure anchor point. Construction codes often require the use of this secondary support point.

Figure 9: Mount speaker into ceiling

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 11: Attach auxiliary support line

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.

Figure 12: Adjust tap selector

Figure 10: Tighten mounting tabs

(left:LC2-PC30G6LC2-PC30G6-8L; right:-4/LC2LC2-PC30G6-PC60G6-8/-10/ LC2-PC60G6-8H)

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Specification Dimensions (depth x diam.)

Bezel diameter Weight

Cabinet construction

LF transducer

HF transducer Mounting system Available colors

Grille construction Acoustic design

11.9" x 12.6" (303 x 320 mm)

13.8" (350 mm) 15.5 lbs (7.0 kg)

Steel enclosure and UL94V-0 rated baffle and bezel

10" (260 mm) high- compliance driver (weatherized cone)

N/A

Integrated 4-point toggle anchors

White

(paintable surface) Powder-coated steel

Ported cabinet, internally damped w/passive crossover

Specifications Product ??? B Appendix

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Specification

Frequency response

Power handling (@ 8??)

Coverage pattern

Sensitivity (SPL 1 W/1 m)

Input configuration

70V/100V power taps

Included accessories

LC2-PC30G6-4

65 Hz???20 kHz

50 W (with overload protection)

130?? conical 86 dB

8??; 70V/100V

1.8 (70V only)/ 3.7/7.5/15/30W

Tile bridge, mounting ring

LC2-PC30G6-8

50 Hz???20 kHz

75 W (with overload protection)

110?? conical 91 dB

8??; 70V/100V

1.8 (70V only)/ 3.7/7.5/15/30W

Tile bridge, mounting ring

LC2-PC30G6-8L 50 Hz???20 kHz

75 W (with overload protection)

110?? conical 91 dB

8??; 70V/100V

1.8 (70V only)/ 3.7/7.5/15/30W

Tile bridge, mounting ring

LC2-PC60G6-8H 50 Hz???20 kHz

75 W (with overload protection)

75?? conical 93 dB

8??; 70V/100V

7.5 (70V only)/ 15/30/60 W

Tile bridge, mounting ring

LC2-PC60G6-10 45 Hz???150 Hz

100 W (with overload protection)

N/A 94 dB

8??; 70V/100V

7.5 (70V only)/ 15/30/60 W

Tile bridge, mounting ring

Specifications Product ??? B Appendix