Boston Acoustics 315 Manuel utilisateur

315

335

Designer Series Ceiling-Mount

Speaker Systems

Speciﬁcations 315 335

Speaker Design Round ceiling-mount speaker Round ceiling-mount speaker

Frequency Response (±3dB) 62–17,000Hz 62–20,000Hz

Recommended Ampliﬁer Power 5–75 watts 5–75 watts

Nominal Impedance 8 ohms 8 ohms

Sensitivity [1 watt (2.83v) at 1m] 90dB 90dB

Bass Unit 51⁄4" (135mm) copolymer 51⁄4" (135mm) copolymer

Dimensions 73⁄4" diameter 73⁄4" diameter

(197mm) (197mm)

Mounting Hole Cutout 63⁄4" (172mm) diameter 63⁄4" (172mm) diameter

Mounting Depth (from surface) 33⁄8" (85mm) 33⁄8" (85mm)

Description

Boston round ceiling-mount loudspeakers deliver outstanding sonic performance, but are virtually

invisible in the room. Their smooth, wide-range response makes them perfect for any application—

main speakers, surround use, or background music.

• Fits in standard light ﬁxture for ease of placement.

• Frame and grille can be painted to match any decor.

• Model 335 adds 3⁄4-inch (19mm) dome ferroﬂuid-cooled tweeter for detailed, articulate sound with

wide dispersion.

This Package Contains

Quantity Description

2 Model 315 or 335 loudspeaker

2 White metal grille

2 Paint mask

2 Cable clamp

1 Hole-cutting template

Examine the contents of the speaker package and conﬁrm that it contains the following:

Introduction

IMPORTANT: This manual is written with the assumption that the installer possesses skill in the

proper use of hand and power tools, a knowledge of local ﬁre and building codes, and a familiarity

with the environment behind the surface of the wall or ceiling in which the speakers will be

installed.

You Will Need

1. A utility knife, an electric jigsaw, or another means of cutting a hole in the mounting surface.

2. Phillips and ﬂat-blade screwdrivers.

3. A wire cutter or stripper for preparing the speaker wires.

315/335 Speaker System Side View Mounting Hole

Cutout Dimensions

73⁄4"

(197mm) 33⁄4"

(95mm) 63⁄4"

(172mm)

Placement

Since the speaker installation is permanent and the furniture placement in a room may not be,

determine a long-term mounting location—one that will accommodate future relocation

of furniture in the room, but will still allow an unobstructed sound path from the speakers to

the listening area.

For best stereo effect, separate the speakers by at least 3 to 6 feet (1–2m). For the most balanced

sound, place each speaker an equal distance from the listener. For the sake of appearance, you

may wish to line up the speaker with lighting or other ceiling ﬁxtures.

NOTE: The speakers should be mounted on a ﬂat surface to form a good seal between the speak-

er ﬂange and the mounting surface.

Surround Sound

The compact size and neutral tonal quality

of these speakers make them perfect for

the surround channel of a home theater

system. Place the speakers toward the back

of the room, behind or beside the listening

position.

If possible, place the speakers so they do

not point directly at the listener. An indirect

sound path from the speakers to the

listening position results in a more diffuse

and convincing surround sound effect.

Painting the Speakers

If you intend to paint the speakers, it’s best to do so before installation. Typically, a primer coat is

not necessary.

1. Remove the speaker grille. Carefully pry on one edge with an awl or a small screwdriver. If you

choose to paint the metal grille, do so after detaching it from the speaker. NOTE: You may ﬁnd it

helpful to thin the paint to be used on the grille. This prevents the paint from ﬁlling the holes.

2. Use the form-ﬁtting painting mask provided

to paint the housing. Cover the slots with

masking tape.

3. After painting, remove the mask by carefully

inserting a screwdriver into the slots. Do not

puncture the drivers behind the mask with the

screwdriver.

4. When painting the grilles, be certain that the

paint does not ﬁll the perforated holes in the

metal. If using spray paint, use two thin coats.

If using house paint or other canned paint, thin

the paint to avoid ﬁlling the holes.

Preparing for Installation

Take the following steps to prepare for installation:

1. Map out the wiring paths from the speakers to the ampliﬁer. We recommend 18-gauge or larger

wire for runs up to 25 feet and thicker 16-gauge wire for longer runs. Be sure the speaker wire does

not rest or rub against any sharp or pointed objects.

2. Each speaker is 8 ohms nominal. When connecting more than two speakers per ampliﬁer chan-

nel, you should use series wiring or an impedance protection device, such as a line transformer.

3. Make sure that the total system’s impedance does not fall below the ampliﬁer’s minimum rating.

If you are not certain, consult your Boston Acoustics dealer.

Installation

1. Make a 63⁄4" (172mm) cutout using the supplied

template. It is not necessary to remove ﬁberglass

insulation that may be behind the wall.

2. Run the wire from the ampliﬁer to the cutout. Allow an extra foot of wire at the cutout. Strip 1⁄2"

(12mm) of insulation off the wire, and tightly twist the wire strands together.

3. Remove the speaker grille. Carefully pry on one side with an awl or a small screwdriver.

4. For wall installation, use the cable clamp

supplied to secure the speaker wire to the

housing. (This clamp is optional in ceiling

installations.) Affix the clamp to one of the

screws used to hold the terminal strip to

the housing.

utility knife

Attach the wires to the terminals

cable clamp

Cut a 63⁄4" hole.

5. Connect the wire to the speaker. Maintain consistency of the +(red) and –(black) connections by

using the markings on the wire. Failure to do so will result in degraded sound.

WARNING: To prevent electrical shock hazard, always switch off the ampliﬁer or receiver when

making connections to the speaker.

There are several ways that wire strands are identiﬁed:

6. Place the speaker in the hole. Use a Phillips

screwdriver to tighten the four pivoting

mounting arms. IMPORTANT: Avoid

overtightening, as this could break the

mounting arms or damage the ceiling surface.

7. Install the grille. The grille will snap into place.

;;;;;;;;;;;;;;;;;;

Tighten the mounting arms

Attach the grille

Smooth/ribbed Smooth/one rib or stripe Different colored wires Fabric strand

Listening Levels and Power-Handling

The power recommendation for the speakers assumes that you will operate the ampliﬁer in a way

that will not produce distortion. Even our rugged speakers can be damaged by an ampliﬁer if it is

producing distortion.

If you hear a harsh, gritty noise, turn down the volume. Prolonged or repeated operation of your

speaker with a distorted signal from the ampliﬁer can cause damage that is not covered by the

warranty.

Limited Warranty

For two years from the date of purchase, Boston Acoustics will repair for the original owner any

defect in materials or workmanship that occurs in normal use of the speaker system, without

charge for parts and labor.

Your responsibilities are to use the system according to the instructions supplied, to provide safe

and secure transportation to an authorized Boston Acoustics service representative, and to present

proof of purchase in the form of your sales slip when requesting service.

Excluded from this warranty is damage that results from abuse, misuse, accidents, shipping, or repairs

or modiﬁcations by anyone other than an authorized Boston Acoustics service representative.

This warranty gives you speciﬁc legal rights, and you may also have other rights which vary from

state to state.

If Service Seems Necessary

First, contact the retailer from whom you purchased the speakers. If that is not possible, write to:

Boston Acoustics, Inc. 300 Jubilee Drive Peabody, MA 01960 U.S.A.

We will promptly advise you of what action to take. If it is necessary to return your speaker to the

factory, please ship it prepaid. After it has been repaired, we will return it freight prepaid in the

U.S. and Canada.

300 Jubilee Drive

Peabody, MA 01960 U.S.A.

978.538.5000

Boston and Boston Acoustics are registered

trademarks of Boston Acoustics, Inc.

Speciﬁcations subject to change without notice.

42-470-3

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