Bowers & Wilkins ASW 4000 User manual

OWNER’S MANUAL
ASW™ 4000

Figure 1
Figure 2
ASW™4000 Owner’s manual
English ...............................5
Français..............................8
Deutsch.............................11
Español ............................14
Português ..........................18
Italiano .............................20
Ne erlan s .......................23
Dansk...............................26
Ελληνικά .........................29
Русский...........................32
................................36
Norsk...............................39
Svenska ............................39
Suomi...............................39
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT LINE IN LINE OUT
RIGHT LEFT RIGHT LEFT
B&W LOUDSPEAKERS LTD
WORTHING ENGLAND
CAUTION: SEE OPERATING MANUAL
ATTENTION: VOIR LE CAHIER D'INSTRUCTIONS
FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD,
REPLACEWITH ONLY SAME
TYPE AND RATING FUSE.
CAUTION:
WHEN SERVICING, USE ONLY
IDENTICAL REPLACEMENT PARTS
DOUBLE INSULATEDATTENTION:
ACTIVE SUBWOOFER
POWER
ON
AUTO
OFF
FUSE
115V~T8A
230V~T4A
50/60Hz~
TO PREVENT FIRE OR SHOCK HAZARD DO NOT
EXPOSE THIS UNIT TO RAIN OR MOISTURE
NO USER SERVICEABLE PARTS INSIDE REFER
SERVICING TO QUALIFIED PERSONNEL
WARNINGS:
POUR EVITER TOUS RISQUES DE FEU OU DE CHOC ELECTRIQUE
N’EXPOSEZ PAS CET APPAREIL A L’HUMIDITE
AUCUN COMPOSANT NE PEUT ETRE REMPLACE PAR L’UTILISATEUR
VEUILLEZ CONTACTER LE SERVICE APRES VENTE AGREE
ATTENTION:
1 2 3 4 5 6 8 9 1
13 11 15 12 14 10

1
Figure 3
Figure 4
SUBWOOFER
SURROUND CENTRE
L
R
FRONT
L
R
Decoder
No. 2 No. 1
Phono ‘T’ – splitter, used
to provide two connections
from single output
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
SURROUND CENTRE
L
R
FRONT
L
R
L
R
LINE IN
L
R
SPEAKERS OUT
RIGHT LEFT
++
+
-
-
-
Decoder Power Amplifier
No. 2 No. 1
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER

2
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
RIGHT LEFT
++
CENTRE
L
R
L
R
SURROUND FRONT
++
+
-
-
--
-
Integrated Decoder
No. 2 No. 1
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
Figure 5
Figure 6
SUBWOOFER
+
-
SURROUND CENTRE
L
R
FRONT
+
-
+
-
+
-
L
R
Integrated Decoder
No. 2 No. 1
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER

3
Figure 7
Figure 8
RIGHT LEFT
++
L
R
LINE OUT
L
R
LINE IN
L
R
SPEAKERS OUT
+
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
LOW–PASS VOLUME
MIN MAX
POWER
ON
AUTO
OFF
PHASE
0 180
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ASW™4000
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
LOW–PASS VOLUME
MIN MAX
POWER
ON
AUTO
OFF
PHASE
0 180
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ASW™4000
ACTIVE SUBWOOFER
--
-
Pre-Amplifier Power Amplifier
No. 1
No. 2
RIGHT LEFT
++
L
R
LINE OUT
L
R
LINE IN
L
R
SPEAKERS OUT
+
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
LOW–PASS VOLUME
MIN MAX
POWER
ON
AUTO
OFF
PHASE
0 180
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ASW™4000
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
LOW–PASS VOLUME
MIN MAX
POWER
ON
AUTO
OFF
PHASE
0 180
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ASW™4000
ACTIVE SUBWOOFER
--
-
Pre-Amplifier Power Amplifier
No. 1
No. 2

4
Figure 9
Figure 10
RIGHT LEFT
++
L
R
SPEAKERS OUT
+
-
-
-
Integrated Amplifier
No. 2 No. 2
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
RIGHT LEFT
++
L
R
SPEAKERS OUT
+
--
-
Integrated Amplifier
No. 2 No. 1
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER
TO SPEAKERS FROM AMPLIFIER
R
L
100
14040
80
0
50
60
MIN MAX MIN MAX
A B 0 180
PHASEEQ.
LINK
OUT
LINE
IN
LINE
OUT
RIGHT LEFT RIGHT LEFT
ACTIVE SUBWOOFER

5
Safety Instructions
Caution:
To re uce the risk of electric shock, o not
remove the back panel. No user-serviceable
parts insi e. Refer servicing to qualifie
personnel.
Explanation of Graphical Symbols
The lightning flash within an equilateral triangle
is inten e to alert you to the presence of un-
insulate " angerous voltage" within the pro uct’s
enclosure that may be of sufficient magnitu e to
constitute an electric shock to persons.
The exclamation point within an equilateral
triangle is inten e to alert you to the presence
of important operating an maintenance
(servicing) instructions in the literature
accompanying the appliance
1 Rea Instructions – All the safety an
operating instructions shoul be rea before
the appliance is operate .
2 Retain Instructions – The safety an operating
instructions shoul be retaine for future
reference.
3 Hee Warnings – All warnings on the
appliance an in the operating instructions
shoul be a here to.
4 Follow Instructions – All operating an use
instructions shoul be followe .
5 Water an Moisture – The appliance shoul
not be use near water – for example, near
a bathtub, washbowl, kitchen sink, laun ry
tub, in a wet basement, or near a swimming
pool an the like.
6 Carts an Stan s – The appliance shoul be
use only with a cart or stan that is
recommen e by the manufacturer.
7 Wall or Ceiling Mounting – The appliance
shoul be mounte to a wall or ceiling only
as recommen e by the manufacturer.
8 Ventilation – The appliance shoul be
situate so that its location or position oes
not interfere with its proper ventilation. For
example, the appliance shoul not be
situate on a be , sofa, rug, or similar
surface that may block the ventilation
openings; or place in a built-in installation,
such as a bookcase or cabinet, that may
impe e the flow of air through the ventilation
openings.
9 Heat – The appliance shoul be situate
away from heat sources such as ra iators,
heat registers, stoves, or other appliances
that pro uce heat.
10 Power Sources – The appliance shoul be
connecte to a power supply only of the
type escribe in the operating instructions
or as marke on the appliance.
11 Groun ing or Polarisation – The appliance
shoul not be groun e . When using an
extension power-supply cor or a power-
supply cor other than that supplie with the
appliance, it shoul be 2-core, fitte with the
appropriate moul e -on plugs an carry
safety approval appropriate to the country
of use.
12 Power Cor Protection – Power-supply cor s
shoul be route so that they are not likely
to be walke on or pinche by items place
on or against them, paying particular
attention to cor s at plugs, convenience
receptacles an the point where they exit
from the appliance.
13 Cleaning – The appliance shoul be
cleane only as recommen e by the
manufacturer.
14 Non-use Perio s – The power cor of the
appliance shoul be unplugge from
the outlet when left unuse for a long
perio of time.
15 Object an Liqui Entry – Care shoul be
taken so that objects o not fall an liqui s
are not spille into the enclosure through
openings.
16 Damage Requiring Service – The appliance
shoul be service by qualifie personnel
when:
a The power-supply cor or the plug has
been amage ; or
b Objects have fallen, or liqui has been
spille into the appliance; or
c The appliance has been expose to rain; or
The appliance oes not appear to operate
normally, or exhibits a marke change in
performance; or
e The appliance has been roppe , or the
enclosure amage .
17 Servicing – The user shoul not attempt to
service the appliance beyon that escribe
in the operating instructions. All other
servicing shoul be referre to qualifie
service personnel.
Warnings:
To prevent fire or shock hazar , o not expose
this equipment to rain or moisture.
Observe all warnings on the equipment itself.
To avoi electrical shock, o not open the
enclosure or remove the amplifier from the
rear panel. There are no user serviceable
parts insi e. Refer all service questions to an
authorise B&W ealer.
To prevent electric shock, o not use this
(polarise ) power plug with an extension cor
receptacle or other outlet unless the bla es can
be fully inserte to prevent bla e exposure.
Ensure that the voltage in icate on the amplifier
panel matches that of the power supply. If it
oes not, contact an authorise B&W ealer to
alter the setting of the voltage selector.
The mains fusehol er is locate on the back
panel of the amplifier mo ule. Replacement fuse
must be of the same type an rating as supplie .
The equipment shoul not be earthe (groun e ).
To ensure a equate cooling of the amplifier,
operate the equipment only with the heatsink fins
aligne vertically.
The subwoofer is heavy an bulky, it shoul
be move or lifte by at least two people.
Check that there are no cables un er the carpet
that may be amage by the spikes.
Do not walk the unit on the spikes as this may
cause them to become etache from the
cabinet an cause amage.
Take care not to spike through your own feet.
GB

6
Introduction
Thank you for purchasing the B&W ASW™4000
Active Subwoofer.
Since its foun ation in 1966, the continuing
philosophy of B&W has been the quest for
perfect soun repro uction. Inspire by the
company’s foun er, the late John Bowers, this
quest has entaile not only high investment in
au io technology an innovation but also an
abi ing appreciation of music an the eman s
of film soun to ensure that the technology is put
to maximum effect.
The ASW™4000 has been esigne for Home
Theatre installations an to augment the bass
performance of ‘full range’ speakers in stereo
au io use. A ing the subwoofer to your
system not only exten s the bass to lower
frequencies, it improves the mi range clarity
by re ucing the low-frequency eman s on
your existing speakers.
The subwoofer is magnetically shiel e for use
close to a television screen.
Please rea through this manual fully before
using the subwoofer. All soun installations
require some planning an experimentation if
you are to get the best out of the pro ucts use
an this manual will gui e you in this process.
As the subwoofer is connecte to the electricity
power supply, it is important that you familiarise
yourself with the safety instructions an hee
all warnings.
Keep this manual in a safe place for future
reference.
B&W lou speakers are istribute to over 60
countries worl -wi e an we maintain an
international network of carefully chosen an
e icate istributors. If you have a problem
which your ealer cannot resolve, our istributors
will be more than willing to assist you.
Unpacking (figure 1)
The easiest way to unpack the subwoofer an
avoi amage is as follows:
•Open the carton flaps right back an invert
the carton an contents.
•Lift the carton away from the pro uct.
•We recommen that you retain the packaging
for future use.
In a ition to this manual, the carton
shoul contain:
•1 Subwoofer
•1 Accessory pack containing:
•4 Spikes with lock nuts
•4 Self-a hesive rubber feet
•1 Phono ‘T’-splitter plug
A tour of the subwoofer (figure 2)
1 Heatsink
2 Line level connectors
3 Speaker level connectors
4 Low-pass filter frequency control (line input)
5 Volume control (line input)
6 Deco er input
7 Volume control ( eco er input)
8 Equalisation switch ( eco er input)
9 Phase switch
10 On/Auto/Off switch
11 Mains input socket
12 Voltage selector/in icator
13 Fusehol er
14 Power/Stan by in icator
15 Toroi al mains transformer housing
Positioning the subwoofer
Because the subwoofer pro uces only low-
frequency soun s, positioning is less critical in
some respects compare with full-range speakers.
Directional information is much less precise an
you have more choice where to place the
speakers to goo effect. This sai , best results
are obtaine if the subwoofer is place between
the satellite speakers or in the vicinity of one of
them. If you use two subwoofers, it is best to put
one near each satellite speaker.
Placing the subwoofer behin the listeners, even
in surroun soun installations, generally gives
inferior imaging; but may be an acceptable
compromise if omestic consi erations ictate.
As with all speakers, the proximity of room
boun aries affects the soun . Bass is generally
increase as more surfaces come into close
proximity with the speakers. Unlike full-range
speakers, however, you can always restore the
correct overall system balance by a justing the
volume level of the subwoofer. The more boost
you get from the room, the less har the speaker
has to work; but there is a own si e. Corner
positions often excite more low-frequency room
resonances, making the bass more uneven with
frequency. There is no substitute for experiment
as all rooms behave ifferently, so try the
subwoofer in a variety of positions before
making a final ecision. A piece of music with
a bass line ascen ing or escen ing the musical
scale is useful for assessing the smoothness of
the bass response. Listen for exaggerate or
quiet notes. Having a separate subwoofer oes
enable you to optimise for room resonances
in epen ently from siting the satellite speakers
for best imaging.
If the subwoofer is to be use in a confine
space (eg in custom furniture), the space must
be ventilate to allow sufficient air to circulate
an cool the unit. Ask your ealer for a vice.
The subwoofer is supplie with four spike feet.
The spikes pierce through carpet pile, giving a
firm support irectly to the floor surface without
crushing the pile. When fitting spikes, first screw
the lock nuts fully onto the spikes, then screw
the spikes fully onto the threa e inserts in the
base of the cabinet. If the unit rocks, loosen the
relevant two opposing spikes until the support is
firm, then re-tighten the lock nuts to the inserts.
If the unit is to be place on a vulnerable surface,
either place a protective isc un er each spike
or fit the four rubber pa s in place of the spikes.
Electrical connections
Disconnect all soun system equipment from the
power supply until the signal connections have
been ma e an checke . This avoi s the risk of
amage whilst connections are ma e or broken.
The function of the subwoofer is to receive
signals from the amplification chain an , where
necessary split the signal into low bass an
higher frequencies an fee the latter back out
to the satellite speakers. Left an right channel
inputs may be combine into a single mono low
bass fee to the subwoofer rive unit if require .
The subwoofer will input an output both line
level signals via the RCA Phono sockets an
speaker level signals via the bin ing posts
locate on the back panel, giving a flexible
choice of connection metho s. However, you
must not use a mixture of line level an speaker
level connections in the same installation. If you
have a choice between line level an speaker
level connections, choose line level.
The subwoofer also has a e icate eco er
input, which is automatically selecte if a signal
is present on this input. If no signal is etecte
on this input for approximately 20 secon s, the
subwoofer will switch to the line/speaker level
inputs.
Deco er volume an equalisation are set by
separate controls from the line an speaker
inputs, for ease of installation.
Use the following table to select the correct
wiring metho for your installation:
Application: Home Theatre
•Deco er with separate power amplifiers:
a With subwoofer output: Connections: fig. 3
b No subwoofer output: Connections: fig. 4
•Deco er with integrate power amplifiers:
a With subwoofer output: Connections: fig. 5
b No subwoofer output: Connections: fig. 6
Application: Stereo Audio
Separate pre- & power amplifiers:
a One or more subwoofers with output
combine into a single mono signal:
Connections: fig. 7
b Two subwoofers with separate left an right
signals: Connections: fig. 8
•Integrate amplifier:
a One or more subwoofers with output
combine into a single mono signal:
Connections: fig. 9
b Two subwoofers with separate left an
right signals: Connections: fig. 10
Using more than one subwoofer
Using more than one unit in a single installation
can improve performance in the following ways:

7
•Maintain stereo separation to the lowest
frequencies.
•Cope with larger listening rooms.
•Enable greater maximum soun output – often
useful for effectively repro ucing special effects
in Home Theatre applications.
•Smooth out the effects of low-frequency room
resonances.
If you are using two subwoofers for stereo au io,
stereo separation is improve if each channel
has its own subwoofer, provi ing each one is
site close to the relevant satellite speaker.
If using a eco er, use the phono ‘T’-piece
provi e , an make connections to the eco er
input on each subwoofer. For two channel au io,
use both line input channels.
Double check the connections
ENSURE THAT THE VOLTAGE INDICATED
ON THE AMPLIFIER PANEL MATCHES THAT
OF THE POWER SUPPLY.
Before au itioning the soun quality of your new
installation an fine tuning it, ouble check the
connections. All too often, users complain that
they cannot get a ecent soun however they set
the controls, only to iscover something has been
wrongly connecte . Make sure that:
•The phasing is correct – there shoul be no
positive to negative connections (this applies
only to speaker level interconnects). If
something is out of phase you may get a fuzzy
soun with an imprecise an floating image,
a lack of bass or a combination of the two.
•There are no left to right mix-ups – this can
result, for example, in the orchestra being the
wrong way roun or, more isastrously, soun s
on your Home Theatre going in the opposite
irection to the action on the screen.
Switching on and off
We recommen that you switch the subwoofer
on before any power amplifiers receiving signals
from the subwoofer. Similarly, when switching
off, switch the subwoofer off last.
Auto:
On first switching the subwoofer to Auto, the
amplifier becomes fully active an the light
above the on/auto/off switch glows green.
After a perio of about 5 minutes without an
input signal, the amplifier automatically reverts to
stan by mo e, an the light glows re . When
an input signal is etecte , the amplifier
automatically becomes fully active an the light
glows green.
On:
With the switch in this position, the amplifier
remains permanently on, an the light glows
green.
Off:
In this position, the amplifier is in stan by, an
the light glows re .
Setting the controls
Line an speaker level inputs
There are three controls to consi er:
•The LOW-PASS filter frequency
•The VOLUME control
•The PHASE switch
Deco er input
There are three controls to consi er:
•The DECODER VOLUME control
•The PHASE switch
•The EQUALISATION switch
The optimum settings epen on the other
equipment use with the subwoofer. If using
more than one subwoofer, make sure the controls
on each one are set the same.
Use with THX®controllers (including THX
controllers set in non-THX mode)
The ASW™4000 is not a THX®license
component, but may be use with a THX®
controller if esire .
•Set the eco er volume control to the etent at
the half-way (12 o’clock) position (this is a
stan ar THX®pre-set level of 88 B SPL @ 1m
for 100mV input signal).
•Set the EQUALISATION switch initially to
position A, then see the section below on
fine tuning.
•Set the PHASE switch initially to 0°, then see
the section below on fine tuning.
Ensure that the subwoofer function on the THX®
controller is enable . When so configure it
incorporates all the filtering an level setting
require for the subwoofer in all mo es. For level
calibration, the internal test noise an channel
level controls in the THX®controller shoul be
use . In all cases the levels shoul be set so as
to obtain 75 B spl (C-weighte ) at the listening
position from the controller’s internal noise test
signal. Refer to your controller manual for further
etails as to how to set the levels. Inexpensive
soun level meters are rea ily available from
electronics stores an shoul be use to
calibrate the levels.
Use with other Home Theatre decoders
•If the eco er has a e icate subwoofer
output an an internal LOW-PASS filter for the
subwoofer having a slope of 2n -or er
(12 b/octave) or greater, set the LOW-PASS
filter frequency to maximum, otherwise set it
initially to 80 Hz.
•Set the VOLUME control initially to the half-way
(12 o’clock) position, then see the section
below on fine tuning.
•Set the PHASE switch initially to 0°, then see
the section below on fine tuning.
Use for stereo audio
•Set the LOW-PASS filter initially to 80 Hz then
see the section below on fine tuning.
•Set the volume control initially to the half way
(12 o’clock) position, then see the section
below on fine tuning.
•Set the PHASE switch initially to 0°, then
see the section below on fine tuning.
Fine tuning
The setting of the EQUALISATION switch affects
only the signal via the eco er input. Position A
is optimise to allow the subwoofer to provi e
the highest listening levels, while position B gives
greater bass extension.
The optimum settings of the PHASE switch an
the LOW-PASS filter frequency are inter-relate
an also epen ent on the low-frequency
cut-off characteristic of the satellite speakers
an the relative positions of all the speakers
in the installation.
Set the system up in the preferre position an
play some programme with a stea y bass content.
The optimum setting for the LOW-PASS cut-off
frequency epen s on several variables – the
bass performance an power han ling of the
satellite speakers, the number of subwoofers
use an their position relative to the satellite
speakers. The range 80-90 Hz is a goo
starting point for the LOW-PASS frequency.
Unless two subwoofers are use to preserve
separate right an left channel information an
are site close to the relevant satellite speakers,
using a higher cut-off frequency may compromise
the stereo image an shoul only be consi ere
if the bass performance of the satellite speakers
is particularly limite .
At each setting of the cut-off frequency, listen with
the phase switch in both positions. The correct
one is that which gives the fullest bass an that
will epen on the bass characteristics of your
satellite speakers an the relative istances of
the subwoofer(s) an the satellite speakers to the
listeners. When using more than one subwoofer,
ensure that each one has its cut-off frequency
an phase switch set the same way.
If at any time you make changes to the
amplification of the system such that you change
from speaker to line level connections to the
subwoofer, it is worth checking the phase setting
again, as the speaker level an line level
high-pass filter phase characteristics of the
subwoofer are ifferent.
Set the lou ness of the subwoofer relative to the
satellite systems to your liking. Use a wi e
variety of programme material to get an average
setting. One that soun s impressive on one piece
may soun overpowering on another. Listen at
realistic levels as the perception of balance
varies with soun level.
If you get problems with lumpy bass – if certain
bass notes are exaggerate more than others –
then you probably have a room interface
problem an it is worth experimenting with the
placement of the subwoofer. What may seem
like small changes in position – 15cm (6in) or
so – can have a profoun effect on the soun .

8
F
Try raising the subwoofer clear of the floor as
well as lateral movement. The use of multiple
subwoofers can smooth the effects of room
resonances as each subwoofer will ten to excite
resonances at ifferent frequencies. If you alter
the relative istances from the subwoofer(s)
an satellite speakers to the listeners
appreciably, reassess the phase switch setting.
You shoul also check the level setting of the
subwoofer (using either the eco er output
levels or the volume control on the subwoofer
amplifier as appropriate), but only after setting
the phase correctly.
Taking care of the subwoofer
The cabinet of the subwoofer may be cleane
by usting with a ry cloth. If you wish to use
an aerosol cleaning spray, o not spray irectly
on the cabinet; spray onto the cloth. Remove
the grille first so that the cloth oes not become
staine , but be careful not to isturb the rive
unit. The grille itself may be cleane using
a soft brush.
Do not use the subwoofer as a table. When
in use, objects left on top of the subwoofer are
liable to rattle. In particular, avoi the risk of
liqui s being spille (eg from rinks or vases
of flowers).
If the system is taken out of use for a long perio ,
isconnect the subwoofer from the power supply.
Avertissements:
Pour éviter tout risque ’incen ie ou
’électrocution, n'exposez jamais cet appareil à
la pluie ou même a l'humi ité.
Assurez-vous, en premier lieu, que la tension
in iquée sur l'appareil correspon bien a celle
e votre réseau électrique. Si vous ne pouvez le
faire, contactez un reven eur B&W autorisé. Ne
tentez pas e mo ifier le réglage u sélecteur
e tension.
Observez tout signe anormal pouvant provenir
u subwoofer lui-même, n'ouvrez jamais
l'enceinte et ne sortez pas l'amplificateur e son
logement; vous n’y trouverez aucun réglage utile.
En cas e problème renseignez-vous,
préalablement à toute intervention, auprès
'un véritable reven eur spécialiste e la
marque B&W.
Pensez que vous risquez l'électrocution si vous
n'enfoncez pas complètement les pôles e
la prise ’alimentation, surtout lorsque
vous employez un prolongateur ou un
raccor électrique.
Les fusibles 'alimentation se trouvent sur le
panneau u mo ule 'amplification. En cas
e remplacement, n'utilisez jamais e fusibles
’un type ifférent; vérifiez que les valeurs
in iquées sur les nouveaux fusibles sont
parfaitement i entiques à celles qui figurent sur
les mo èles 'origine.
Cet appareil ne oit pas être raccor é à
la terre.
Pour assurer une ventilation suffisante à
l'amplificateur, les ailettes es ra iateurs e
refroi issement oivent être orientées en
position verticale.
Ce subwoofer est lour et volumineux, il oit être
manipulé par un minimum e eux personnes.
Contrôlez que les câbles ne risquent pas 'être
transpercés par les pointes e écouplage.
Ne éplacez pas l'appareil en le faisant glisser
sur ses pointes. Vous risquez e les arracher ou
e créer es égats.
Prenez simplement gar e e ne pas vous piquer.
Introduction:
Nous vous remercions 'avoir choisi le
Subwoofer actif B&W ASW™4000.
Depuis la création e notre entreprise en 1966,
la base invariable e notre philosophie a toujours
été la recherche e la perfection absolue.
Inspirée par son fon ateur, le regretté John
Bowers, cette extraor inaire aventure qu’est la
quête e l'absolu, n'a pas seulement ébouché
sur e très lour s investissements consacrés à la
recherche et à l'innovation, mais aussi sur une
profon e connaissance e la musique et es
spécificités u son cinématographique. Cette
connaissance nous permet e nous assurer que
la technologie sera toujours utilisée au service
u meilleur résultat possible et non à la
technique pour la technique.
L'ASW™4000 n’a pas seulement été étu ié
pour les installations e Home Cinéma, il
convien ra naturellement à la repro uction e
haute qualité es très basses fréquences e toute
chaîne sonore.
Ce subwoofer apporte, en plus ’une extension
spectaculaire e la réponse vers l'extrème-grave,
une amélioration non négligeable e la clarté
e repro uction u mé ium, grâce à la ré uction
u travail eman é aux enceintes principales.
L’ASW™4000 est blin é magnétiquement.
Vous pouvez onc l'utiliser à proximité e
votre téléviseur.
Veuillez lire attentivement et totalement cette
notice avant 'utiliser votre subwoofer. Toute
installation sonore recquiert un minimum
'attention et 'expérimentation quan on
souhaite en tirer le meilleur parti; ce manuel
vous gui era ans cette voie.
Avant e raccor er le subwoofer au réseau
électrique, il est important que vous ayez pris
connaissance es consignes e sécurité pour
que vous puissiez tenir compte e tout signe
anormal ou alarmant.
Rangez ce gui e e telle façon que vous
puissiez le retrouver facilement pour e
futures consultations.
La istribution e B&W est assurée ans plus e
60 pays à travers le mon e. Nous entretenons
un réseau ’importateurs sélectionnés avec la
plus gran e attention.
Quelque soit le problème qu'un reven eur ne
saurait régler, n'hésitez jamais à contacter votre
agent national afin qu'il puisse vous assister.
Deballage: (figure 1)
Pour éballer aisément votre subwoofer tout en
évitant le risque ’un choc malencontreux,
veuillez procé er e la manière suivante:
Ouvrez les abattants u carton au maximum puis
retournez le colis.
Il suffit ensuite e soulever le carton pour que
l'appareil sorte e l'emballage.
Nous vous conseillons e conserver le carton et
ses accessoires pour toute utilisation ultérieure.
En plus e ce manuel vous trouverez également:
•Le Subwoofer
•Un sachet ’accessoires contenant:
•4 pointes e écouplage
•4 tampons auto-a hésifs
•1 raccor e é oublement CINCH en T

40
Description
Drive units
System frequency response
Low-Pass Filter
High-Pass Filter
Internal Volume
Dimensions
Net Weight
Finish
ASW
™
4000
THX is a registere tra emark of Lucasfilm Lt . B&W Lou speakers Lt .
reserves the right to amen etails of the specification without notice in line with technical evelopments.
Copyright © B&W Lou speakers Lt . Printe in Englan .
B&W Lou speakers Lt , Mea ow Roa , Worthing, BN11 2RX Tel: [phone] Fax: [phone]
http://www.bwspeakers.com
Active vente -box subwoofer
One 380mm (15 in) ia long throw with magnetic shiel ing
±3 B 17Hz - 40 / 140Hz a justable (Line In)
±3 B 17Hz - 250Hz (Deco er In, EQ at ‘B’)
±3 B 24Hz - 250Hz (Deco er In, EQ at ‘A’)
Amplifier Power output 450W continuous
Input impe ance 22kW
Sensitivity 88 B spl at 1m for 100mV input
(Deco er input, level set to centre etent position)
Signal/Noise 90 B
Functions Line input level
Deco er input level
Deco er input equalisation
Phase 0/180
Inputs Line In (RCA Phono)
Deco er In (RCA Phono)
Speaker Level In (Bin ing Posts)
Outputs Line Out (RCA Phono, h-p filtere )
Link Out (RCA Phono)
Speaker Level Out (Bin ing Posts, h-p filtere )
Active 4th-or er variable cut-off 40Hz - 140Hz (Line In)
fixe cut-off 250Hz
Line Level active 3r -or er at 80Hz
Speaker Level passive 1st-or er at 80Hz into 8W resistor
(Response using speaker level connections
epen ent on satellite impe ance)
100 litres (3.6 cu ft)
Height: 580mm (22.8 in)
Wi th: 610mm (24 in)
Depth: 580mm (22.8 in))
75kg (165 lb)
Cabinet: Real woo veneers of Black Ash,
Cherrywoo an Re Staine Cherrywoo
Grille: Black cloth
I4840