Руководство Bowers and Wilkins DM604 S2 Динамики

Руководство

1

ENGLISH

INTRODUCTION

Thank you for choosing B&W.

Please read this manual fully before unpacking

and installing the product. It will help you to

optimise its performance.

B&W maintains a network of dedicated

distributors in over 60 countries who will be able

to help you should you have any problems your

dealer cannot resolve.

UNPACKING

(figure 1)

•Fold the carton flaps right back and invert

the carton and contents.

•Lift the carton clear of the contents.

•Remove the inner packing from the product.

We suggest you retain the packing

for future use.

Check in the carton for:

•2 (604)/4 (603) foam plugs.

•4 spike feet with lock nuts.

POSITIONING

(figures 2 & 3)

Do not fit the spike feet until you have found

the best position for your speakers.

As an initial guide (figure 2):

•Position the speakers and the centre of the

listening area approximately at the corners

of an equilateral triangle.

•Keep the speakers at least 1.5m apart

to maintain left-right separation.

•Keep the speaker baffles at least 0.5m clear

of walls.

Stray magnetic fields

The speaker drive units create stray magnetic

fields that extend beyond the boundaries of the

cabinet. We recommend you keep magnetically

sensitive articles (television and computer

screens, computer discs, audio and video tapes,

swipe cards and the like) at least 0.5m from the

speaker.

CONNECTIONS

(figures 4 & 5)

All connections should be made with the

equipment switched off.

There are 2 pairs of terminals at the back of

the speaker which permit bi-wiring if desired.

On delivery, the separate pairs are connected

together with high-quality links for use with a

single 2-core cable. For single cable connection,

leave the links in place and use either pair of

terminals on the speaker (figure 4).

Ensure the positive terminal on the speaker

(marked + and coloured red) is connected

to the positive output terminal of the amplifier

and negative (marked – and coloured black)

to negative. Incorrect connection can result in

poor imaging and loss of bass.

To bi-wire, remove the links by loosening the

terminal caps and use a separate 2-core cable

from the amplifier to each pair of terminals. This

can improve the resolution of low-level detail.

Observe the correct polarity as before. When

bi-wiring, incorrect connection can also impair

the frequency response (figure 5).

Ask your dealer for advice when choosing

cable. Keep the total impedance below the

maximum recommended in the specification and

use a low inductance cable to avoid attenuation

of the highest frequencies.

FINE TUNING

Before fine tuning, double check that all the

connections in the installation are correct and

secure.

Moving the speakers further from the walls will

reduce the general level of bass. Space behind

the speakers also helps to create an impression

of depth. Conversely, moving the speakers closer

to the walls will increase the level of bass.

If you want to reduce the bass level without

moving the speakers further from the wall, fit

the foam bungs in the port tubes (figure 6).

If the bass is uneven with frequency it is usually

due to the excitation of resonance modes in the

room. Even small changes in the position of the

speakers or the listeners can have a profound

effect on how these resonances affect the sound.

Try mounting the speakers along a different wall.

Even moving large pieces of furniture can have

an effect.

If the central image is poor, try moving the

speakers closer together or toeing them in

so they point at or just in front of the listeners.

If the sound is too harsh, increase the amount

of soft furnishing in the room (for example use

heavier curtains), or reduce it if the sound is

dull and lifeless.

Test for flutter echoes by clapping your hands

and listening for rapid repetitions. Reduce them

by the use of irregular shaped surfaces such as

bookshelves and large pieces of furniture.

Ensure the speakers stand firmly on the floor.

Whenever possible fit the spike feet supplied

after you have optimised the positioning. They

are designed to pierce through carpeting to the

floor surface. Initially, screw the lock nuts fully

onto the spikes and screw the spikes fully into

the threaded inserts in the base of the speaker.

If the cabinet rocks, unscrew the appropriate

spikes until the speaker stands firmly on the floor

and lock them in place by tightening the lock

nuts against the base. If you do not have a

carpet, use a protective disc under the spikes

to protect the floor surface.

AFTERCARE

The cabinet surface usually only requires dusting.

If you wish to use an aerosol cleaner, remove

the grille first by gently pulling it away from

the cabinet. Spray onto the cleaning cloth, not

directly onto the cabinet. The grille fabric may

be cleaned with a normal clothes brush whilst

the grille is detached from the cabinet.

Avoid touching the drive unit diaphragms,

especially the tweeter, as damage may result.

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