Yamaha NS-M325 Manuel utilisateur

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Read this before using the speaker.

•To assure the finest performance, please read this

manual carefully. Keep it in a safe place for future

reference.

•Install the speaker in a cool, dry, clean place – away

from windows, heat sources, sources of excessive

vibration, dust, moisture and cold. Avoid sources of

humming (transformers, motors). To prevent fire or

electrical shock, do not expose the speaker to rain or

water.

•To prevent the enclosure from warping or discoloring, do

not place the speaker where it will be exposed to direct

sunlight or excessive humidity.

•Do not place the following objects on the speaker:

Glass, china, etc.

If glass etc. falls by vibrations and breaks, it may cause

personal injury.

A burning candle etc.

If the candle falls by vibrations, it may cause fire and

personal injury.

A vessel with water in it

If the vessel falls by vibrations and water spills, it may

cause damage to the speaker, and/or you may get an

electric shock.

•Do not place the speaker where foreign objects such as

water drips might fall. It might cause a fire, damage to

the speaker, and/or personal injury.

PRECAUTIONS

NS-M325 Speaker System

OWNER’S MANUAL

URGT

Thank you for selecting this YAMAHA NS-M325 speaker system.

•Do not place the speaker where it is liable to be knocked

over or struck by falling objects. Stable placement will

also ensure better sound performance.

•Placing the speaker on the same shelf or rack as the

turntable can result in feedback.

•Any time you note distortion, reduce the volume control

on your amplifier to a lower setting. Never allow your

amplifier to be driven into “clipping”. Otherwise the

speaker may be damaged.

•When using an amplifier with a rated output power

higher than the nominal input power of the speaker, care

should be taken never to exceed the speaker’s

maximum input.

•Do not attempt to clean the speaker with chemical

solvents as this might damage the finish. Use a clean,

dry cloth.

•Do not attempt to modify or fix the speaker. Contact

qualified YAMAHA service personnel when any service

is needed. The cabinet should never be opened for any

reasons.

•Secure placement or installation is the owner’s

responsibility.

YAMAHA shall not be liable for any accident caused

by improper placement or installation of the speaker.

NS-M325-EN 6/20/05, 1:32 AM1

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WARNING:

•This speaker weighs 3.8 kg (8.4 lbs). Do not mount it

on thin plywood or a wall with soft surface material. If

mounted, the screws may come out of the flimsy

surface and the speaker may fall. This damages the

speaker or causes personal injury.

•Do not install the speaker to a wall with nails,

adhesives, or any other unstable hardware. Long-

term use and vibrations may cause it to fall.

•To avoid accidents resulting from tripping over loose

speaker cable, fix it to the wall.

■To mount the speaker on a wall by using

the attached mounting bracket

Fasten screws into a firm wall or wall support as shown

in the figure, and hang the holes of the mounting

bracket on the protruding screws.

*Make sure that the screws are securely caught by the

narrow parts of the holes.

Wall/ wall

support

Tapping screw (3.5–4 mm)

(Available at the hardware

store)

40 mm

Min.

20 mm

3 mm

You can also use the screw holes on the rear of the

speaker for installing the speaker using a commericially

available speaker bracket (if you do not use the attached

mounting bracket).

Screw holes

Diameter: 6 mm

Hole depth: 15 mm

60 mm

Place the speakers on a sturdy, vibration-free surface, on a

well-built stand.

■Using as 2ch stereo speakers

Better stereo images will be obtained when the speakers

are slightly angled in towards the listeners.

■Using as front speakers in a multi channel

system

Position the speakers on both sides of the TV. The

positioning of speakers is important, because it controls the

whole sound quality of a multi channel system. Set up the

speakers on the basis of your listening position by following

the owner’s manual supplied with your amplifier.

■Using as presence or surround speakers

Mount the speakers on a wall or place the speakers on a

shelf. Determine the best position by following the owner’s

manual supplied with your amplifier.

Note:

This speaker features a magnetically shielded design,

but there is still a chance that placing it too close to a

TV set might impair picture color or create a buzzing

noise. Should this happen, move the speaker away from

the TV set.

PLACING THE SPEAKERS

Subwoofer

Center

NS-M325

(Front)

NS-M325

(Presence)

NS-M325

(Surround)

NS-M325

(Surround

back)

NS-M325-EN 6/20/05, 1:32 AM2

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English

SPEAKERS

+––

–

CONNECTIONS TO YOUR AMPLIFIER

Amplifier or

Receiver

NS-M325

Before making connections, make sure that the amplifier is switched off.

■CONNECTIONS

•Connect the screw-type input terminals at the rear of the

speakers to the speaker output terminals of the amplifier

(or receiver) with the speaker cable.

•Connect the (+) terminals on the amplifier (or receiver)

and the speakers using one side of the cable. Connect

the (–) terminals on both components using the other

side of the cable.

•Connect one speaker to the left (marked L) terminals of

your amplifier, and another speaker to the right (marked

R) terminals, making sure not to reverse the polarity

(+, –). If one speaker is connected with reversed polarity,

the sound will be unnatural and lack bass.

How to connect:

1Loosen the knob.

2Remove the insulation coating at the extremity of each

speaker cable by twisting the coating off.

3Insert the bare wire.

4Tighten the knob and secure the cables.

Test the firmness of the connection by pulling lightly on

the cables at the terminal.

Note:

Do not let the bare speaker wires touch each other as

this could damage the speaker or the amplifier, or both

of them.

Loosen

Black (–)

When using a banana plug

1Remove the cover by pulling it toward you.

2Tighten the terminal knob.

3Simply insert the banana plug into the terminal.

Banana plug

Red (+)

NS-M325

Speakers output

terminals of the

amplifier (or

receiver)

(R) (L)

Tighten

NS-M325-EN 6/20/05, 1:32 AM3

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SPECIFICATIONS

Type .............. 2-way acoustic suspension speaker system

Magnetic shielding type

Driver ............................................ 10 cm (4”) cone woofer

3 cm (1”) dome tweeter

Impedance ................................................................... 6 Ω

Frequency Response .................. 65 Hz to 50 kHz (-10d B)

Nominal Input Power .................................................. 30 W

Maximum Input Power ............................................. 120 W

Sensitivity .................................................. 86 dB/2.83 V/m

Crossover Frequency .............................................. 2.5kHz

Dimensions (WxHxD) ......................... 150 x 275 x 175 mm

(5-7/8” x 10-13/16” x 6-7/8”)

Weight ................................................... 3.8 kg (8 lbs.6 oz.)

●Specifications are subject to change without notice due

to product improvements.

●Care should be taken not to exceed the input power

values noted above.

REMOVING THE FRONT COVER

The front cover is attached to protect the speaker unit, but

you can remove it if necessary.

The front cover is fixed by magnets. Hold the speaker with

one hand, and pull the front cover gently with the other to

remove it.

Notes:

•When removing the cover, be careful that you don’t

touch the drive units, and don’t exert excessive

force with any tools.

•There are magnets on the reverse side of the front

cover. Do not place the front cover close to objects

that might be affected by magnets, such as TVs,

clocks, magnetic cards, diskettes etc. after

removing it.

NS-M325-EN 6/20/05, 1:32 AM4

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