Niles CM7HD Manuel utilisateur

CEILING MOUNT

INSTALLATION GUIDE

DESIGNER AESTHETICS

AUDIOPHILE PERFORMANCE

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Thank you for choosing the Niles CM Loudspeaker Series. With proper

installation, use, and care, your loudspeakers will deliver years of listening

enjoyment. Niles manufactures the industry’s most comprehensive line of

custom installation components and accessories. For information on our

complete product assortment, please visit us at: www.nilesaudio.com.

TABLE OF CONTENTS

Introduction 3

Features and Benefits 3

Parts Guide 4

Installation Considerations 4

Installing the Loudspeakers 6

Switch Adjustments 8

Painting the Grilles 8

Installing the Grilles 8

Applications 9

CONGRATULATIONS!

NILES AUDIO – 1-800-BUY-HIFI – 1-760-710-0992 2

LEFT/CENTER/RIGHT CEILING-MOUNT LOUDSPEAKERS

SURROUND EFFECTS CEILING-MOUNT LOUDSPEAKERS

STEREO INPUT CEILING-MOUNT LOUDSPEAKERS

CM7

CM8

CM7

CM7 CM8

3WWW.NILESAUDIO.COM

INTRODUCTION

Niles CM Loudspeakers deliver an uncompromising combination of designer

oriented aesthetics, superb sound performance, and ease of installation. Small

footprint and low prole, MicroThin™ magnetically attached grilles provide the

look that today’s homeowners desire. Available in 7” and 8” versions, there are

left/center/right, surround effects, and stereo input models to satisfy applications

ranging from advanced home theaters to distributed audio systems.

FEATURES AND BENEFITS

DESIGNER AESTHETICS

Magnetically attached MicroThin™ round speaker grilles ensure a clean,

unobtrusive designer appearance that blends with the room’s aesthetics. Optional

square grilles provide added design exibility.

INSTALLATION EASE

Three patent-pending, spring tensioned mounting clamps permit quick installation

and compensate for uneven mounting surfaces and varied environmental

conditions. Weather-resistant construction enables installation in moist areas such

as bathrooms or outdoors under eaves.

INSTALL WITH CONFIDENCE

The best-built loudspeakers deserve the best protection—the Niles Lifetime

Limited Warranty.

NILES AUDIO – 1-800-BUY-HIFI – 1-760-710-0992

PARTS GUIDE

PACKAGE CONTENTS FOR:

CM7BG, CM7MP, CM7PR, CM7HD, CM7SI, CM8MP, CM8PR,

CM8HD AND CM8SI

(1) Niles CM loudspeaker, (1) Magnetically attached round grill, (1) Hole template

with painting standoffs, (1) Owner’s manual, (1) Warranty card

PACKAGE CONTENTS FOR: CM7FX

(2) Niles CM7FX loudspeakers, (2) Magnetically attached round grilles, (2) Hole

templates with painting standoffs, (1) Owner’s manual, (1) Warranty card

INSTALLATION CONSIDERATIONS

Recommended tools for installation:

7” LOUDSPEAKERS

These require an 8-1/2” (21.6 cm)

diameter hole opening and a

minimum of 4-3/8” (11.1 cm)

depth when measured from the

exterior face of the drywall. To the

sides of the hole you will need 1”

(2.54 cm) for the mounting tabs to

clamp the speaker to the drywall.

8” LOUDSPEAKERS

These require a 9-3/4” (24.8 cm)

diameter hole opening and depth

of 4-3/4” (12.1 cm) from the

exterior face of the drywall. To the

sides of the hole you will need 1”

(2.54 cm) for the mounting tabs to clamp the speaker to the drywall.

(CONTINUED ON NEXT PAGE)

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Figure 1. Required dimensions for installation in ceiling.

CM7 3-5/16" (8.4 cm)

CM8 4-1/8" (10.5 cm)

Depth Behind Drywall

Assuming 5/8" drywall

CM7 8-1/2”(21.6 cm)

CM8 9-3/4”(24.8 cm)

Diameter Hole Opening

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*Not for use with SI Speakers

INSTALLATION CONSIDERATIONS

CONTINUED

NOTE: BE VERY CAREFUL WHEN LOCATING THE SPEAKERS. VERIFY ALL LOCATIONS ARE

CLEAR OF OBSTRUCTIONS BEFORE CUTTING THE FIRST HOLE.

Each speaker requires two-conductor wiring of sufcient gauge. The gauge

depends on the length of the wire. For recommendations, please refer to (Figure 2).

(Stereo Input loudspeakers require four-conductor wiring).

When running loudspeaker wire inside walls or ceilings, use special jacketed

cable (CL-2 or CL-3 rating) to protect the wire and for re prevention. In some

municipalities, conduit is required. For a trouble-free installation, low voltage wire

such as loudspeaker wire must be in accordance with the National Electrical Code

and any applicable provisions of the local building code. If you are unsure of the

correct installation techniques, wire jacket, or type of conduit to use, consult a

professional audio/video installer, building contractor, or the local building and

inspection department.

Distance from speaker to amplifier Wire Gauge

Less than 80 feet 16

80 to 200 feet 14

More than 200 feet 12

Figure 2. Speaker Wire Gauge Guide

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(CONTINUED ON NEXT PAGE)

INSTALLING THE LOUDSPEAKERS

It is often easier to lay the speakers out on the oor and then transfer the

locations to the ceiling with a laser plumb bob. If you are using new construction

brackets, place string across the centers of the bracket to provide a way to align

the bracket to the laser. Remember, you will need 1” (2.54 cm) to the sides of the

mounting hole for the mounting clamps to secure the speaker to the drywall.

1. Once you have determined a possible position for the hole cutout, drill a

1/8” pilot hole just barely through the ceiling (1/2” to 5/8” deep in most

homes) in the center of your proposed loudspeaker location. BE VERY

CAREFUL NOT TO DRILL THROUGH EXISTING WIRES, PIPES, OR

STRUCTURE. IF YOU FEEL ANY EXTRA RESISTANCE AS YOU ARE

DRILLING, STOP.

2. Cut a foot-long piece of coat hanger. Bend the wire (creating a right angle)

leaving 5-1/2” at one end (this allows for the extra width of the mounting

dogs). Poke the “L-shaped” wire into the pilot hole and turn it

in a complete circle and move it into the ceiling cavity to make sure

you have approximately 4-3/8” of depth for the CM7 Series and 4-3/4”

of depth for the CM8 Series loudspeakers. If the wire’s movement is

obstructed by anything, fill the hole(s) with spackle and try another

location. (If there is any risk of uninsulated electrical connections within

the ceiling area, use insulating gloves or other materials or consult with an

installation professional before proceeding).

3. If the coat hanger moves freely in a complete circle and you have

sufficient depth, tape the template to the ceiling and proceed to layout the

other speakers. Once you are comfortable with all speaker locations, use

a pencil to lightly outline the circular template.

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5. If you are cutting drywall, use a sheetrock or keyhole saw. Cut the hole

with the saw at a 45° angle. That way the drywall section can be replaced

cleanly if there is an unseen obstruction behind the wall. IMPORTANT: BE

VERY CAREFUL NOT TO SAW THROUGH EXISTING WIRES, PIPES,

OR STRUCTURE. IF YOU FEEL EXTRA RESISTANCE AS YOU ARE

CUTTING, STOP.

NOTE: DO NOT INSTALL LOUDSPEAKERS BEFORE THE DRYWALL HAS BEEN COMPLETELY

FINISHED AND PAINTED.

7WWW.NILESAUDIO.COM

INSTALLING THE LOUDSPEAKERS CONTINUED

6. Prep the speaker wire by stripping 1/4”-1/2” from each speaker lead.

Twist the strands or tin the leads with solder to ensure there are no stray

strands that could short and possibly harm the amplifier.

7. If you’ve chosen to use insulation behind the loudspeaker, place it

through the hole and center it on the opening. If using paper-backed

insulation, it should be placed so that the paper side is away from the

loudspeaker.

8. The speaker has black and red

spring-loaded connectors (Figure 3).

Black is for the negative (-) wire and

red for the positive (+). It is important

to observe correct wiring polarity.

This is especially important for the

Stereo Input (SI) Loudspeaker. If you

have wire other than black and red,

make sure you connect it the same

on the amplifier end as the speaker

end. Failure to do so will adversely

affect the loudspeakers’ performance.

9. Once the speaker wires are

connected, carefully slide the

loudspeaker into the opening hole

(Figure 4). While holding the speaker

in place, tighten the mounting screws

to secure the speaker to the drywall.

We recommend using a motorized

screwdriver. Be careful not to over

tighten. The CM loudspeakers feature

spring loaded mounting clamps that

allow the speaker to remain flush

with the ceiling, even if the

drywall shifts or expands.

NOTE: DO NOT CARRY THE SPEAKER

BY THE TWEETER OR TWEETER

BRIDGE. THIS MAY DAMAGE THE

SPEAKER.

Figure 4. Installing a

CM loudspeaker.

Figure 3. Spring-loaded speaker wire

connectors.

Mounting clamps require

1” clearance to the sides

of the hole opening

NILES AUDIO – 1-800-BUY-HIFI – 1-760-710-0992

SWITCH ADJUSTMENTS

TREBLE SWITCH

(PR AND HD MODELS)

The three-position tweeter switch allows you to adjust the high frequency output

of the loudspeaker to compensate for room acoustics. The center position,

marked 0, does not affect the tweeter’s output. Moving the switch to the –

position reduces the tweeter output by 3 dB to compensate for bright rooms

(tile or wood oors, sparse furnishing, tall ceilings). Moving the switch to the

+position increases the tweeter output by 3 dB to compensate for absorptive

rooms (carpeting, lots of drapery, plush furniture, etc.).

DIFFUSE / DIRECT SWITCH

(CM7FX)

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are mixed using non-localized surround effects and music is usually recorded in a

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recordings that equally emphasize front and surround sounds. For 7.1-channel

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PAINTING THE GRILLES

The CM loudspeaker grilles can be painted without priming, but the fabric scrim

must rst be removed. The installation template has die cut standoffs that can be

used to position the grille off the ground while painting. Use several light coats

sprayed from different sides and angles to cover all surfaces and not ll in any

holes. If you do ll some holes, use compressed air to open them before the paint

dries. It may be helpful to slightly dilute the paint to prevent it from clogging the

grille holes.

INSTALLING THE GRILLES

The Niles MicroThin™ speaker grille installs magnetically over the speaker.

Carefully center the grill over the speaker and let the magnets do their work,

verifying that the grill sets ush against the ceiling at all edges.

9WWW.NILESAUDIO.COM

(CONTINUED ON NEXT PAGE)

APPLICATIONS

Niles CM Loudspeakers are designed to be installed in any standard ceiling.

When choosing a location, thought should be given to the sound coverage of the

loudspeaker, and ease of running the speaker wire. Niles manufactures a large

variety of speaker models for many different applications, with special models for

shallow depth ceilings, models with Rear Wave Enclosures to minimize any sound

bleeding through to adjacent rooms, etc.

STEREO SOUND APPLICATIONS

The best stereo effect will be achieved if both

loudspeakers are at an equal distance from the

listening area. Ideally all loudspeakers should

be on the same horizontal plane (Figure 6). Avoid

installing loudspeakers near corners to prevent

a “boomy” or diffracted sound. Also note that

the lower the ceiling, the closer the loudspeaker

should be placed to the listener.

HOME THEATER

APPLICATIONS

Left/Center/Right – Position the center

channel loudspeaker directly over the

television, with the left and right speakers

equidistant from the center. The separation

between the left and right should not be

more than the distance to the primary

seating area (Figure 7).

Side Surround Effects (CM7FX) – Position

surround effects loudspeakers to the sides

of the listening area with the tweeters in-line

with the listener. The tweeters should point

to the front and rear of the room (Figure 7).

Rear Surround Effects (CM7FX) – Position

surround effects loudspeakers behind the

listening area, to the inside of the front left

and right speakers. The tweeters should

point to the sides of the room (Figure 7).

Figure 7. Home Theater Application.

Critical

Listening

Position

LCR

Figure 6. Stereo Sound Application.

3-6'

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