Bang & Olufsen BeoLab 7-4 User manual

Guide
BeoLab 7-4

Cautions!
– Make sure that the loudspeaker
is placed and connected in
accordance with the instructions
in this Guide. To prevent injury,
use Bang & Olufsen approved
stands and wall brackets only!
– The loudspeaker can only be
switched off completely by
disconnecting it from the wall
socket.
– Do not attempt to open the loud-
speaker. Leave such operations
to qualified service personnel!
– The loudspeaker is designed for
indoor use in dry, domestic
environments only, and for use
within a temperature range of
10–40º C (50–105º F).
– Do not place any items on the
loudspeaker.
– Do not lift the loudspeaker by
gripping the acoustic lens.
– Prolonged listening at high
volume levels may cause hearing
damage!
WARNING: To reduce the risk of fire or
electric shock, do not expose this appliance
to rain or moisture. Do not expose this equip-
ment to dripping or splashing and ensure
that no objects filled with liquids, such as
vases, are placed on the equipment.
To completely disconnect this equipment
from the AC Mains, disconnect the power
supply cord plug from the AC receptacle.
The lightning flash with arrowhead symbol
within an equilateral triangle, is intended
to alert the user to the presence of un-
insulated “dangerous voltage” within the
product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric
shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and main-
tenance (servicing) instructions in the
literature accompanying the product.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To reduce the risk of
electric shock, do not remove
cover (or back).
No User-serviceable parts inside.
Refer servicing to qualified service
personnel.
Acoustic Lens Technology –
manufactured under license from
Sausalito Audio Works.

Daily use
When you have finished setting
up the loudspeaker as described
on the following pages, connect
the entire system to the mains.
Loudspeaker protection
The loudspeaker is equipped with a
thermal protection system which
prevents damage from overheating.
If an error occurs – or the speaker
units become overheated – the
system automatically switches the
loudspeaker to standby.
To restore the sound:
> Disconnect the loudspeaker from
the mains.
> Allow the system time to reset or
cool down (approximately 3–5
minutes).
> Reconnect the loudspeaker to the
mains.
Should the problem persist, contact
your Bang & Olufsen retailer.
Cleaning the loudspeaker
Clean dusty surfaces using a dry, soft
cloth. If necessary, remove grease
stains or persistent dirt with a lint-
free, firmly wrung cloth, dipped in
a solution of water containing only
a few drops of mild detergent, such
as washing-up liquid.
Never use a vacuum cleaner to clean
the exposed speaker membrane in
the acoustic lens. However, the loud-
speaker front grill may be cleaned
with a vacuum cleaner with a soft
brush nozzle, and set to the lowest
level.
Never use alcohol or other solvents to
clean any parts of the loudspeaker!
Switching on and off
When you switch on your Bang &
Olufsen system, the loudspeaker
switches on simultaneously, and
when you switch the system off
again the loudspeaker also switches
to standby.
Caution: Do not touch the exposed
speaker membrane in the acoustic
lens!
Handle the loudspeaker front grill
with great care. Dents and scratches
are not covered by the guarantee!
!
3

Set up the loudspeaker
We recommend that you follow
this procedure:
– Disconnect your Bang & Olufsen
system from the mains.
– Mount the loudspeaker to the
Bang & Olufsen stand or wall
bracket as explained on the next
page.
– Connect the loudspeaker as
explained in ‘Cable connections’
(pp. 6–7).
– Set the POSITION switch to the
correct setting. This is explained
in ‘Adapt the loudspeaker to
your room’ (pp. 8–9).
– Connect the entire system to the
mains again.
BeoLab 7-4 brackets: The loud-
speaker must be fastened to one of
the brackets shown here, and on a
suitable Bang & Olufsen stand or
wall bracket.
Use the ‘type 1 bracket’ when the
loudspeaker will be fastened to one
of the ‘single-column’ Bang &
Olufsen stands or wall brackets.
Use the ‘type 2 bracket’ when the
loudspeaker will be fastened to one
of the ‘double-column’ Bang &
Olufsen stands.
Placement: The loudspeaker must
be placed centred below the
screen. Always place the loud-
speaker in an upright position!
If the loudspeaker is mounted on the
wall, for example in a BeoVision 4
setup, we recommend that you
place the loudspeaker 5–15 cm
(~ 2–6") below the screen, and no
more than 98 cm (~ 35") above the
floor.
4
‘Type 1 bracket’
‘Type 2 bracket’

Here is shown how to fasten
the loudspeaker with a ‘type 1
bracket’ to a Bang & Olufsen
‘single-column’ stand (or wall
bracket). Use the same procedure
if you wish to fasten the loud-
speaker to a Bang & Olufsen
‘double-column’ Stand – with a
‘type 2 bracket’.
aRemove the small cover (if any)
on the stand. Press the cover as
shown, and it will come loose.
bFasten the bracket to the stand or
wall bracket. Use the two longest
screws (M5 × 25 mm) – four
screws for a ‘type 2 bracket’.
cFasten the loudspeaker to the
bracket. Use the short screw
(M5 × 8 mm). However, do not
fully tighten it until you have made
the adjustments mentioned to the
right (d). Adjustments: Use the two screws
(d) to align the loudspeaker with
the stand or wall bracket. Then
position the loudspeaker so that the
side is vertical, and finally tighten
the screw (c).
b
c
c
d
c
d
a
5
dc

Cable connections
The loudspeaker is primarily
intended to be used in a
surround sound setup with
BeoVision 7*. It may, however, be
used with other Bang & Olufsen
systems as well – for example in
a BeoVision 4 surround sound
setup.
If used in a setup not including
BeoVision 7, you will require a
mains cord and a Power Link
cable. These cables are available
as optional accessories from
your Bang & Olufsen retailer.
Mains connections
The loudspeaker has two sockets
concerning mains supply.
The socket marked ~is for mains
supply input (connection from the
wall outlet), and the other is a mains
supply output to BeoVision 7 (this
socket is not available on loud-
speakers intended for the US-
market).
Note: The mains cord from the wall
outlet must be fastened to the
cable clamp on the loudspeaker –
as shown on the next page.
POSITION switch
This switch has two settings: F
(Free-standing position) and W
(Wall position).
Which setting to use is explained in
‘Adapt the loudspeaker to your room’
(pp. 8–9).
POWER LINK socket
Use this socket to connect the loud-
speaker to one of the Power Link
sockets on the Bang & Olufsen
system – see the next page.
6
Mains connection
to BeoVision 7
POSITION switch Cable clamp
POWER LINK
socket
The socket panel is located on the rear of the loudspeaker.
*NOTE! BeoVision 7 and its
accessories are not available on all
markets.

Connection to other Bang &
Olufsen systems …
Use a Power Link cable of the
correct type to connect the loud-
speaker to a Power Link socket on
the Bang & Olufsen system.
For further information, refer to the
Guide enclosed with the Bang &
Olufsen system.
Power Link cable: Do not use a
cable of the older type, as this will
cause noise, and therefore not give
optimum sound quality! The new
type has a triangular mark on the
plug.
Connection to BeoVision 7 …
Connect the loudspeaker to one of
the Power Link sockets on the left
BeoVision 7 socket panel.
For further information about the
BeoVision 7 socket panels, refer to
the Guides enclosed with the
product.
The two mains cords and the
Power Link cable are enclosed with
BeoVision 7.
Cable clamp: For safety reasons,
the mains cord from the wall outlet
must be secured to the loudspeaker.
To do so, tug the cord behind the
clamp.
Power Link
Mk 3
7
BeoVision 7
BeoLab 7-4

Adapt the loudspeaker to your room
When a loudspeaker is placed
in a corner or close to a wall,
the bass level is boosted
compared to the bass level from
a loudspeaker placed in a more
free-standing position.
To remove this excessive bass
boost, use the POSITION switch
to ensure that the bass level
suits the placement of the
loudspeaker. The appropriate
switch setting depends on the
distance from the loudspeaker
to the walls and corners of the
room.
The POSITION switch
• F (Free-standing position)
Use this setting if the loudspeaker
is placed so that the front grill is
more than 50 cm (20") from the
rear wall, for example on one of
the stands.
• W (Wall position)
Use this setting if the loudspeaker
is placed so that the front grill is
less than 50 cm (20") from the rear
wall.
Always use this setting if the loud-
speaker is placed on any of the wall
brackets, but also when placed on
one of the stands – close to the
rear wall.
F W
8

The POSITION switch is located on
the loudspeaker socket panel.
How to measure: The distance is
measured as shown here – the loud-
speaker seen from above.
FW
9

To get access to the approval
labels, remove the loudspeaker
front grill:
Push the front grill downwards until
stop (~ 10 cm/4"). The front grill
can now be removed.
Note: When attaching the front grill
again, first insert the centre peg into
the bottom end of the groove (a),
and move the front grill upwards.
Make sure that all six ‘attach-points’
engage fully with the corresponding
brackets on the loudspeaker (b), so
that the front grill is properly seated.
b
b
b
b
b
b
a
10