Bowers & Wilkins AS2: инструкция

AS2

Owner’s Manual

and Warranty

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Contents

English

Magyar

Limited Warranty...........2

Korlátozott garancia ..40

Owner’s Manual............2

Használati útmutató ...40

Français

Ελληνικά

Garantie limitée.............6

Περιορισµένη

Manuel d’utilisation.......6

εγγύηση....................44

Οδηγίες Χρήσεως ....45

Deutsch

Beschränkte

Русский

Garantie .....................10

Ограниченная

Bedienungsanleitung...11

гарантия....................50

Руководство по

Español

эксплуатации............50

Garantía limitada.........15

Manual de

Norsk

instrucciones ..............15

Tidsbegrenset

garanti........................55

Português

Bruksanvisning ...........55

Garantia limitada.........20

Manual do utilizador....20

Svenska

Begränsad garanti ......56

Italiano

Bruksanvisning ...........57

Garanzia limitata .........24

Manuale di istruzioni ...24

.......................58

Nederlands

.....................58

Beperkte garantie .......28

Handleiding ................29

.......................62

Polski

....................62

Gwarancja .................32

Instrukcja

uÃytkownika ...............33

.......................65

....................65

"esky

Záruka .......................36

Návod k pouãití..........36

1

advise where the equipment can be

7 Grounding or Polarisation – The

English

serviced. You can call B&W in the UK

appliance is not required to be

or visit our web site to get the contact

grounded. Ensure the plug is fully

details of your local distributor.

inserted into the wall outlet or

Limited Warranty

extension cord receptacle to prevent

To validate your warranty, you will need to

blade or pin exposure. Versions of the

Dear customer,

produce this warranty booklet completed

product marked for use with 110V –

and stamped by your dealer on the date of

Welcome to B&W.

120V power supplies are equipped

purchase. Alternatively, you will need the

with a power cord fitted with a

This product has been designed and

original sales invoice or other proof of

polarised alternating line plug (a plug

manufactured to the highest quality

ownership and date of purchase.

having one blade wider than the other).

standards. However, if something does go

This plug will fit onto the power outlet

wrong with this product, B&W

only one way. This is a safety feature. If

Loudspeakers and its national distributors

you are unable to insert the plug fully

warrant free of charge labour (exclusion

Owner’s manual

into the outlet, try reversing the plug. If

may apply) and replacement parts in any

the plug should still fail to fit, contact

country served by an official B&W

your electrician to replace your

distributor.

IMPORTANT

obsolete outlet. Do not defeat the

This limited warranty is valid for a period of

safety purpose of the polarised plug.

five years from the date of purchase or two

SAFETY

When using an extension power-supply

years for electronics including amplified

cord or a power-supply cord other than

loudspeakers.

INSTRUCTIONS

that supplied with the appliance, it

should be fitted with the appropriate

Terms and Conditions

CAUTION

moulded-on plugs and carry safety

1 The warranty is limited to the repair of

RISK OF ELECTRIC SHOCK

approval appropriate to the country of

the equipment. Neither transportation,

DO NOT OPEN

use.

nor any other costs, nor any risk for

8 Power Cord Protection – Power-supply

removal, transportation and installation

Caution:

cords should be routed so that they

of products is covered by this warranty.

To reduce the risk of electric shock, do not

are not likely to be walked on or

2 This warranty is only valid for the

remove the back panel. No user-

pinched by items placed on or against

original owner. It is not transferable.

serviceable parts inside. Refer servicing to

them, paying particular attention to

qualified personnel.

cords at plugs, convenience

3 This warranty will not be applicable in

receptacles and the point where they

cases other than defects in materials

Explanation of Graphical

exit from the appliance.

and/or workmanship at the time of

Symbols:

purchase and will not be applicable:

9 Overloading – Do not overload wall

The lightning flash within an

outlets, extension cords or integral

a for damages caused by incorrect

equilateral triangle is intended

convenience receptacles, as this can

installation, connection or packing,

to alert you to the presence of

result in a risk of fire or electric shock.

b for damages caused by any use other

uninsulated “dangerous

10 Ventilation – The amplifier panel at the

than correct use described in the user

voltage” within the product’s

rear of the product forms part of the

manual, negligence, modifications, or

enclosure that may be of

cooling mechanism and must not be

use of parts that are not made or

sufficient magnitude to

obscured by placing the product on a

authorised by B&W,

constitute an electric shock to

bed, sofa, rug, or other similar surface.

persons.

c for damages caused by faulty or

Ensure the heat sink fins are aligned

unsuitable ancillary equipment,

The exclamation point within

vertically to ensure proper cooling. The

an equilateral triangle is

product should not be placed in a

d for damages caused by accidents,

intended to alert you to the

built-in installation, such as a rack,

lightning, water, fire heat, war, public

presence of important

bookcase or cabinet unless proper

disturbances or any other cause

operating and maintenance

ventilation is provided or the

beyond the reasonable control of B&W

(servicing) instructions in the

manufacturer’s instructions have been

and its appointed distributors,

literature accompanying the

adhered to.

e for products whose serial number has

appliance.

11 Heat – The product should be situated

been altered, deleted, removed or

away from heat sources such as

made illegible,

WARNINGS:

radiators, heat registers, stoves, or

f if repairs or modifications have been

1 Read Instructions – All the safety and

other products (including amplifiers)

executed by an unauthorised person.

operating instructions should be read

that produce heat. No naked flame

before the appliance is operated.

sources, such as lighted candles,

4 This guarantee complements any

should be placed on the apparatus.

national/regional law obligations of

2 Retain Instructions – The safety and

dealers or national distributors and

operating instructions should be

12 Wall or Ceiling Mounting – The product

does not affect your statutory rights as

retained for future reference.

should be mounted to a wall or ceiling

a customer.

only as recommended by the

3 Heed Warnings – All warnings on the

manufacturer.

How to claim repairs under

appliance and in the operating

warranty

instructions should be adhered to.

13 Water and Moisture – To reduce the

risk of fire or electric shock, do not

Should service be required, please follow

4 Follow Instructions – All operating and

expose the product to rain, dripping,

the following procedure:

use instructions should be followed.

splashing or excessive moisture such

1 If the equipment is being used in the

5 Installation – Install in accordance with

as in a sauna or bathroom. Do not use

country of purchase, you should

the manufacturer’s instructions.

this product near water – for example,

contact the B&W authorised dealer

near a bathtub, washbowl, kitchen

6 Power Sources – This product should

from whom the equipment was

sink, laundry tub, in a wet basement,

be operated only from the type of

purchased.

or near a swimming pool and the like.

power source indicated by the marking

2 If the equipment is being used outside

situated on the rear panel. If you are

14 Object and Liquid Entry – Never push

the country of purchase, you should

not sure of the type of power supply to

objects of any kind into this product

contact the B&W national distributor in

your home, consult your product

through openings, as they may touch

the country of residence who will

dealer or local power company.

dangerous voltage points or short out

2

parts that could result in a fire or

e If the product has been dropped, or

international network of carefully chosen

electric shock. Never spill liquid of any

damaged in any way.

and dedicated distributors. If you have a

kind on the product. Do not place any

problem, which your dealer cannot resolve,

f When the product exhibits a distinct

object containing liquid on top of the

our distributors will be more than willing to

change in performance – this

product.

assist you.

indicates a need for service.

15 Cleaning – Unplug the product from

22 Replacement Parts – When

Unpacking (figure 1)

the wall outlet before cleaning. Refer to

replacement parts are required, be

the cleaning instructions in the section

The easiest way to unpack the subwoofer

sure the service technician has used

of the manual titled “Aftercare”.

and avoid damage is as follows:

replacement parts specified by the

16 Attachments – Do not use attachments

manufacturer or have the same

• Open the carton flaps right back and

not recommended by the product

characteristics as the original part.

invert the carton and contents.

manufacturer, as they may cause

Unauthorised substitutions may result

• Lift the carton away from the product.

hazards.

in fire, electric shock or other hazards.

We recommend that you retain the

17 Accessories – Do not place this

23 Mains fuses are located inside the

packaging for future use.

product on an unstable cart, stand,

amplifier and replacement should be

tripod, bracket or table. The product

entrusted to an authorised B&W agent.

In addition to this manual, the carton

may fall, causing serious injury to a

Replacement fuse types are shown in

should contain:

child or adult, and serious damage to

the specification.

1 Subwoofer

the product. Use only with a cart,

24 Safety Check – Upon completion of

stand, tripod, bracket or table

4 screw-in rubber feet

any service or repairs to this product,

recommended by the manufacturer or

ask the service technician to perform

4 screw-in spike feet with lock nuts

sold with the product. Any mounting of

safety checks to determine that the

the product should follow the

product is in proper operating

Inputs, controls and indicators

manufacturer’s instructions and should

condition.

use a mounting accessory

The input panel (figure 2)

recommended by the manufacturer.

25 Magnetic fields – The product creates

1 SPEAKER IN sockets

a stray static magnetic field. Do not

18 Moving the appliance – A product and

place any object that may be damaged

2 LINE IN socket

cart combination should

by this magnetic field (eg cathode ray

be moved with care.

3 LINK OUT socket

tube televisions or computer monitors,

Quick stops, excessive

audio and viseo tapes and swipe

4 Power supply rating

force and uneven

cards) within 0.5m (2 feet) of the

surfaces may cause the

5 Power cord

appliance. The appliance may cause

product and cart combination to

distortion of cathode ray tube images

The control panel (figure 3)

overturn. Check that there are no

beyond this distance.

cables under the carpet that may be

6 LED indicator

damaged by the spike feet. Do not

26 The only means of completely

7 Standby/auto/on switch (MODE)

walk the product on the spike feet as

disconnecting the product from the

this may cause them to become

power supply is by removing the power

8 Equalisation switch (EQ)

detached from the cabinet and cause

cord from the wall outlet. The wall

9 Phase switch (PHASE)

damage. Take care not to impale

outlet must remain freely accessible at

yourself with the spike feet.

all times while the apparatus is in use.

10 Low-pass frequency control (Hz)

19 Non-use Periods – The power cord of

11 Volume control (VOL)

Introduction

the appliance should be unplugged

from the outlet when left unused for a

Thank you for purchasing this B&W Active

What the subwoofer does

long period of time.

Subwoofer.

Application: Home Theatre

20 Servicing – Do not attempt to service

Since its foundation in 1966, the continuing

The primary function of the subwoofer is to

this product yourself, as opening or

philosophy of B&W has been the quest for

reproduce signals from the Low Frequency

removing covers may expose you to

perfect sound reproduction. Inspired by the

Effects (LFE) channel. In addition, the

dangerous voltage or other hazards.

company’s founder, the late John Bowers,

processor may be configured to divert the

Refer all servicing to qualified service

this quest has entailed not only high

low bass portion of some or all of the other

personnel.

investment in audio technology and

channels and add it to the LFE information

innovation but also an abiding appreciation

21 Damage Requiring Service – Unplug

by configuring those speakers to ‘small’ in

of music and the demands of film sound to

this product from the wall outlet and

the processor set-up procedure.

ensure that the technology is put to

refer servicing to qualified personnel

maximum effect.

Application: 2-channel audio

under the following conditions:

This subwoofer has been designed for

The subwoofer is used to extend the bass

a When the power-supply cord or

Home Theatre installations and to augment

response beyond that provided by the

plug has been damaged.

the bass performance of ‘full range’

satellite speakers. In most cases, best

b If liquid has been spilled or objects

speakers in 2-channel audio use.

results are obtained if the satellite speakers

have fallen into the appliance.

are run full range as normal directly from

Please read through this manual fully before

the power amplifier. The subwoofer low-

c If the product has been exposed to

using the subwoofer. All sound installations

pass filter is then set so that its output rises

rain or water.

require some planning and experimentation

as that of the satellite speakers falls

if you are to get the best out of the

d If the product does not operate

naturally.

products used and this manual will guide

normally by following the operating

you in this process.

Positioning the subwoofer

instructions. Adjust only those

controls that are covered by the

As the subwoofer is connected to the

Because the subwoofer produces only low-

operating instructions, as an

electricity power supply, it is important that

frequency sounds, positioning is less critical

improper adjustment of other

you familiarise yourself with the safety

in some respects compared to full-range

controls may result in damage and

instructions and heed all warnings.

speakers. Directional information is much

will often require extensive work by

less precise and you have more choice

Keep this manual in a safe place for future

a qualified technician to restore the

where to place the speakers to good effect.

reference.

product to its normal operation.

This said, best results are obtained if the

B&W loudspeakers are distributed to over

subwoofer is placed between the left and

60 countries worldwide and we maintain an

right speakers or in the vicinity of one of

3

them. If you use two subwoofers, it is best

together by connecting the LINK OUT

Switching on and off

to put one near the left and one near the

socket (3) of the first to the LINE IN socket

We recommend that you switch the

right speaker.

(2) of the next.

subwoofer on after any equipment feeding

Placing the subwoofer behind the listeners,

Application: 2-channel audio

signals to it. Similarly, when switching off,

even in surround sound installations,

switch the subwoofer off first.

For 2-channel operation, use speaker level

generally gives inferior imaging, but may be

rather than line level connections. The

The MODE standby/auto/on switch (7) does

an acceptable compromise if domestic

subwoofer presents a high impedance load

not isolate the amplifier completely from the

considerations dictate.

to the stereo power amplifier and takes

power supply. It maintains a low-power

As with all speakers, the proximity of room

very little current, so may be connected in

input to an auxiliary sensing circuit.

boundaries affects the sound. Bass is

parallel with the main speakers with no

The switch (7) operates as follows:

generally increased as more surfaces come

adverse effects.

into close proximity with the speakers.

O On:

Using one subwoofer (figure 5)

Unlike full-range speakers, however, you

With the switch in this position, the

can always restore the correct overall

The left and right channels are both

amplifier remains permanently on, and the

system balance by adjusting the volume

connected and summed in the subwoofer

light glows green.

level of the subwoofer. The more boost you

amplifier.

A Auto:

get from the room, the less hard the

Using two subwoofers (figure 6)

On first switching the subwoofer to Auto,

speaker has to work; but there is a down

the amplifier goes into standby mode, and

side. Corner positions often excite more

If one subwoofer can be placed close to the

the light glows red. When an input signal is

low-frequency room resonances, making

left speaker and the other close to the right

detected, the amplifier automatically

the bass more uneven with frequency.

speaker, stereo separation is best

becomes fully active and the light glows

maintained by connecting each subwoofer

There is no substitute for experiment as all

green. After a period of about 5 minutes

to a separate output channel of the amplifier.

rooms behave differently, so try the

without an input signal, the amplifier

subwoofer in a variety of positions before

If the subwoofers cannot be placed close

automatically reverts to standby mode and

making a final decision. A piece of music

to the main speakers, better results may be

the light glows red.

with a bass line ascending or descending

obtained by feeding the left and right

s Standby:

the musical scale is useful for assessing the

channels to both subwoofers, connecting

In this position, the amplifier is in

smoothness of the bass response. Listen

both subwoofers as shown in figure 5 and

permanent standby, and the light glows

for exaggerated or quiet notes. Having a

described above in the section “Using one

red. If, when set to Auto, the subwoofer

separate subwoofer does enable you to

subwoofer”.

should repeatedly go into standby mode

optimise for room resonances

when playing programme via the LINE IN

independently from siting the satellite

Using more than one subwoofer

socket, try reducing the volume setting on

speakers for best imaging.

Using more than one unit in a single

the subwoofer and restoring the balance by

If the subwoofer is to be used in a confined

installation can improve performance in the

increasing the subwoofer output of the

space (eg in custom furniture), the space

following ways:

processor.

must be ventilated to allow sufficient air to

• Maintain stereo separation to the

If the subwoofer is to be out of use for an

circulate and cool the unit. Ask your dealer

lowest frequencies.

extended period of time, we recommend

for advice.

you isolate it from the power supply by

• Cope with larger listening rooms.

The subwoofer is supplied with four spike

removing the plug from the power socket.

feet. The spikes pierce through carpet pile,

• Enable greater maximum sound output

giving a firm support directly to the floor

– often useful for effectively

Setting the controls

surface without crushing the pile. If the unit

reproducing special effects in Home

There are 4 controls to consider:

is to be placed on a vulnerable surface,

Theatre applications.

such as a wooden floor, either place a

• The volume control (VOL) (11)

• Smooth out the effects of low-

protective disc under each spike or fit the

frequency room resonances.

• The low-pass frequency

four rubber feet in place of the spikes.

control (Hz) (10)

When fitting either the rubber feet or the

Double-check the connections

• The PHASE switch (9)

spike feet, first screw the lock nuts fully

ENSURE THAT THE VOLTAGE INDICATED

onto the thread and then screw the feet

• The EQ (equalisation) switch (8)

ON THE AMPLIFIER PANEL MATCHES

fully onto the threaded inserts in the base

THAT OF THE POWER SUPPLY.

The optimum settings depend on the other

of the cabinet. If the unit rocks, loosen the

equipment used with the subwoofer. If

relevant two opposing feet until the support

Before auditioning the sound quality of your

using more than one subwoofer, ensure the

is firm, then re-tighten the lock nuts to the

new installation and fine-tuning it, double-

controls on each one are set the same.

inserts.

check the connections. All too often, users

complain that they cannot get a decent

Use with home theatre decoders

Electrical connections

sound however they set the controls, only

The B&W Active Subwoofer is not a THX®

to discover something has been wrongly

Disconnect all sound system equipment

licensed component, but may be used with

connected. Make sure that:

from the power supply until the signal

a THX® controller if desired.

connections have been made and checked.

• The phasing is correct – there should

• Set the volume control initially to the

This avoids the risk of damage whilst

be no positive to negative connections

12 o’clock (detent) position.

connections are made or broken.

to the satellite speakers. If something

is out of phase you may get a fuzzy

• Set the EQ switch initially to position i.

The subwoofer will input both line-level

sound with an imprecise and floating

signals via the RCA Phono sockets and

• Set the PHASE switch initially to +.

image, a lack of bass or a combination

speaker level signals via the binding posts

of the two.

• The setting of the low-pass frequency

located on the back panel.

control is irrelevant.

• There are no left to right mix-ups – this

Use the following guide to select the

can result, for example, in the

See also the section “Fine tuning”.

correct wiring method for your installation:

orchestra being the wrong way round

If you have a THX® controller, ensure that

Application: Home Theatre (figure 4)

or, more disastrously, sounds on your

the subwoofer function is enabled. When

Home Theatre going in the opposite

Connect the subwoofer LINE IN socket (2)

so configured it incorporates all the filtering

direction to the action on the screen.

to the line-level output of the processor

and level setting required for the subwoofer

marked LFE or SUBWOOFER, using a

in all modes. For level calibration, the

suitable coaxial interconnect cable. If using

internal test noise and channel level

more than one subwoofer, daisy chain them

controls in the THX® controller should be

4

used. In all cases the levels should be set

2-channel audio

Taking care of the subwoofer

to obtain 75dB SPL (C-weighted) at the

The optimum settings of the PHASE switch

The cabinet of the subwoofer may be

listening position from the controller’s

and the low-pass filter frequency control

cleaned by dusting with a dry cloth. If you

internal noise test signal. The detent

are inter-related and also dependent on the

wish to use an aerosol cleaning spray, do

position of the volume control on the

low-frequency cut-off characteristic of the

not spray directly on the cabinet; spray

subwoofer corresponds to the THX®

satellite speaker. However, the settings

onto the cloth. Remove the grille first so

standard of 88dB spl at 1m for an input at

recommended above for the low-pass filter

that the cloth does not become stained,

the LINE IN socket of 100mV.

frequency and PHASE have been chosen to

but be careful not to disturb the drive unit.

With other decoders, configure the front

add well to most bass alignments, whether

The grille itself may be cleaned using a soft

and surround speakers to “large” or “small”

closed-box or vented-box (reflex), with

brush.

as appropriate before setting the levels.

-6dB frequencies within the adjustment

Do not use the subwoofer as a table. When

Use the internal noise test signal and

range of the subwoofer.

in use, objects left on top of the subwoofer

volume controls of the decoder to set the

Set the system up in the preferred position

are liable to rattle. In particular, avoid the

levels of all the speakers. If there is not

and play some programme with a steady

risk of liquids being spilled (eg from drinks

enough range in the processor to achieve

bass content.

or vases of flowers).

the correct levels, adjust the volume control

on the subwoofer.

Using the initial settings guide, first check

If the system is taken out of use for a long

the setting of the PHASE switch. Choose

period, disconnect the subwoofer from the

Inexpensive sound level meters are readily

the position that gives the fullest sound.

power supply.

available from electronics stores and should

Normally the recommended position will be

be used to calibrate the levels. Refer to

optimum, but may not be in certain

your decoder manual for further details on

circumstances, such as if the power

how to set the levels.

amplifiers feeding the satellite speakers

2-channel audio

invert the signal, or if the subwoofers are

not placed close to the satellite speakers.

• Set the volume control initially to the

12 o’clock (detent) position.

Next, set the loudness of the subwoofer

relative to the satellite systems to your

• Set the EQ switch initially to position i.

liking. Use a wide variety of programme

• Set the PHASE switch initially to –.

material to get an average setting. One that

sounds impressive on one piece may

• Set the low-pass frequency to the

sound overpowering on another. Listen at

-6dB cut-off frequency of your satellite

realistic levels as the perception of balance

speakers.

varies with sound level.

Both -3dB and -6dB figures are to be

Finally, adjust the low-pass filter frequency

found in the specification of each B&W

to give the smoothest transition between

speaker model. However, if the

the subwoofer and satellite speakers. This

manufacturer of the satellite speakers does

is probably the most difficult to optimise.

not quote a -6dB frequency, but only a

-3dB frequency, the optimum setting for the

All applications

low-pass filter frequency control will be

The EQ switch alters the bass extension of

between 0.6 and 0.9 times the -3dB

the subwoofer. The lower the frequency, the

frequency, depending on the roll-off

more the driver diaphragm must move to

alignment. The more gradual the roll-off

achieve a given loudness level. You can

rate of the satellite speakers, the lower the

therefore trade off bass extension for a

frequency should be set.

higher average output level. Position i gives

See also the section “Fine tuning”.

the greatest bass extension and position iii

the least. We recommend you use position

Fine-tuning

i unless the subwoofer shows signs of

distress at the required replay level.

Home theatre

If you get problems with uneven bass – if

With home theatre the subwoofer (LFE)

certain bass notes are exaggerated more

signal is a separate channel rather than an

than others – then you probably have a

extension of the signal to the satellite

room interface problem and it is worth

speakers. The low-pass filter does not

experimenting with the placement of the

operate in the line level input circuit,

subwoofer. What may seem like small

because the processor provides all the

changes in position – 15cm (6in) or so –

filtering for any speakers set to “small”.

can have a profound effect on the sound.

However, the position of the phase switch

The use of multiple subwoofers can smooth

must still be assessed. Normally the phase

the effects of room resonances, as each

will be set to +, but if the subwoofer is

subwoofer will tend to excite resonances at

positioned at a distance significantly

different frequencies. If you alter the relative

different from the other speakers, or the

distances from the subwoofer(s) and

power amplifier driving the other speakers

satellite speakers to the listeners

happens to invert the signal, the – position

appreciably, reassess the phase switch

may be preferable. Listen with the switch in

setting. You should also check the level

both positions and choose the one that

setting of the subwoofer (using either the

gives the fullest sound. If there is little

processor output levels or the volume

difference, leave the switch at +.

control on the subwoofer amplifier as

Surround sound processors normally have

appropriate), but only after setting the

a calibrated noise signal that can be used

phase correctly.

to set the relative levels of all the speakers,

When using more than one subwoofer,

making the task somewhat more

ensure that each one has its low-pass filter

straightforward than for 2-channel audio.

frequency and PHASE set the same way.

However, do not be afraid to alter the

settings to your personal preference.

5