Εγχειρίδιο Bowers and Wilkins LCR6 S2 Ηχείο

Εγχειρίδιο

1

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.

The speaker is primarily intended for home

theatre installations, but is equally at home with

2-channel audio. Separate sections in the

manual are devoted to the two applications.

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:

• 4 self-adhesive rubber pads.

POSITIONING

All Applications

The speaker may be used in either vertical or

horizontal orientation. However, vertical

orientation offers better horizontal dispersion and

is to be preferred in most cases as this leads to

a more stable image over a wide listening area.

Horizontal orientation can be used with little

detriment to the imaging if the speaker is used

in the front centre position of a home theatre

installation where the listeners are within 15˚

of the centre line – equivalent to 0.8m at a

listening distance of 3m.

The speaker has a reflex port at the rear. Leave

at least 10cm clear space between the back of

the speaker and the wall behind, to allow the

port to operate properly.

Fix the 4 self-adhesive pads to the base of the

speaker. They give a degree of vibration

isolation, especially useful if placing the speaker

directly on top of a fairly flimsy television. The

flat area on top of the television may be smaller

than the base of the speaker, so position the

feet accordingly.

Home Theatre

(figure 2)

As a front centre speaker:

If using a projection television with an

acoustically transparent screen, place the

speaker behind the centre of the screen.

Otherwise position it directly above or below

the screen, whichever is closest to ear level.

Align the front of the speaker approximately

level with the screen.

As a front left and right speaker:

As an initial guide:

• Make the height of the tweeter approximately

the same as the centre speaker.

• Space the speaker between 0.5m and 1m

from the side of the screen.

As a surround speaker:

There are two ways of presenting surround

information. You can either attempt to get

good imaging in all directions or go for a more

diffuse, ambient effect. The choice is made

more difficult by the fact that some movies are

produced assuming a diffuse surround

presentation and others attempt to portray more

precise imaging.

In both cases position the speakers to the sides

and behind the listeners.

For more precise imaging, mount the speakers at

or just above ear height and point them at the

listening area. (figure 3)

Do not expect the imaging to the sides and rear

to be as precise as at the front. Phantom images

between the speakers are fairly easy to create

with sustained tones, but fricative or percussive

sounds can tend to localise more at the

speakers. It is also difficult to get an ideal

balance between front and surround speakers

for more than one row of listeners.

For a more diffuse effect, mount the speakers

higher and point them along either the rear or

side wall. (figure 4)

2-Channel Audio

(figure 5)

Mount the speakers so that the tweeters are

approximately at ear level.

As an initial guide:

• 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 are magnetically shielded

such that the stray magnetic field outside the

boundaries of the cabinet, except the front, is

too low to cause distortion of the television

picture in the vast majority of cases.

There are, however, some extremely sensitive

televisions – some that even have to be adjusted

according to their alignment with the earth’s

magnetic field. If you have a problem, first

degauss the television set with the speaker in

place. Some have a button especially for this

purpose. If not, switch off the set at the mains for

15 minutes and switch on again. Merely putting

the set into standby mode is not sufficient.

If you still have a problem, try moving the

speaker either forwards or backwards a little to

get a more favourable juxtaposition, or space

the speaker further from the television until the

distortion disappears.

Because of the higher stray magnetic field in

front of the speaker, we recommend you keep

magnetically sensitive articles (computer discs,

audio and video tapes, swipe cards and the

like) at least 0.2m from the speaker.

CONNECTIONS

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 6)

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.

(figure 7) 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.

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

All Applications

Before fine tuning, double check that all the

connections in the installation are correct

and secure.

The inertness of the support used can affect

the sound quality of the speaker. For best results,

mount the speakers on firm dedicated stands.

Bookshelf mounting is possible but allows

less opportunity for optimising the sound.

Ask your dealer for advice on the best type for

your needs.

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 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.

Βαθμολογία

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