English; Installation And Setup Manual - Bowers & Wilkins ISW-4 Guia De Instalacion

English

Installation and
Setup Manual
Introduction
Dear customer,
Thank you for choosing Bowers & Wilkins. Please read
this manual and the matching amplifier manual fully
before unpacking and installing the product. They 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.
Environmental Information
All B&W products are designed to comply
with international directives on the
Restriction of Hazardous Substances
(RoHS) in electrical and electronic equipment and the
disposal of Waste Electrical and Electronic Equipment
(WEEE). These symbols indicate compliance and that
the products must be appropriately recycled or
processed in accordance with these directives. Consult
your local waste disposal authority for guidance.
This manual covers the ISW-4 in-wall subwoofer and
its Back Box. Operation of and connections to the
matching SA250 Mk2 rack mount amplifier are covered
in a separate manual supplied with the amplifier.
Carton Contents
The product is shipped in three cartons: the ISW-4
Carton, the Back Box Carton and the SA250 Mk2
carton.
In addition to the Driver Panel, check the ISW-4 carton
for:
This manual
1 x Wall Frame
1 x Grille
1 x Cut-out template
1 x Adhesive B&W logo
1 x Paint mask
6 x M5 bolts
1 x Frame Gasket
In addition to the Back Box itself, check the Back Box
Carton for:
1 x Installation Instructions
1 x Gasket roll
4 x Brackets
12 x M5 bolts
12 x special washers
12 x locking washer
The ISW-4 is designed both for Home Theatre
installations and to augment the bass performance of
'full range' speakers in 2-channel audio systems. All
audio installations require some thought in installation
if they are to reach their full performance potential and
this manual will guide you through the process.
Subwoofer Positioning
The ear poorly perceives the source location of low
frequency sound so the position of subwoofers in
the listening room is generally less critical compared
to full-range speakers. That said, however, best
results are usually obtained if the subwoofer is placed
between the left and right speakers or in the vicinity of
one of them. If two subwoofers are used it is best to
put one near the left and one near the right speaker.
Locating a subwoofer on one side wall of the listening
room, even behind the listening position, is also possible
but generally results in inferior imaging. It may be an
acceptable compromise, however, especially in multi-
channel AV systems, if domestic considerations dictate.
As with all speakers, the proximity of room boundaries
affects the sound of a subwoofer. Bass volume
increases as more surfaces come into close proximity
with the speaker. Unlike full-range speakers, however,
the overall system balance can be corrected by
adjusting the volume level of the subwoofer. The more
boost gained from the room, the lower the volume
can be set and the less hard the subwoofer has to
work; but there is a down side. Subwoofers positioned
near corners often generate more low-frequency
room resonances, making the bass more uneven with
frequency.
Using multiple subwoofers in a single installation can
improve performance in the following ways:
• Maintains stereo separation to the lowest
frequencies.
• Smoothes out the effects of low frequency room
resonances.
• Enables a higher maximum sound output.
In the case of two subwoofers used in a 2-channel
audio system, stereo separation will only be improved
if each channel has its own subwoofer located close to
the appropriate satellite speaker.
Subwoofer Installation
The ISW-4 in-wall subwoofer is intended for
installation within new build drywall (stud wall) or solid
construction (brick or block-work) walls. In both cases
installation must begin before plaster and/or sheetrock
(plasterboard) is applied to the wall. It is possible to
install the subwoofer in an existing drywall but the
amount of subsequent wall re-build may make such an
exercise impractical. Carefully consider the implications
of installation in an existing wall before going ahead.
The Back Box supplied with ISW-4 defines its acoustic
loading and must be used for correct operation.
Stage 1: Fitting the Back Box
Drywall (stud wall) construction
Ensure the wall studding is properly prepared so that
there is sufficient clearance for the Back Box and its
cable entry gland. The Back Box is intended to fit
between two adjacent wall studs (battens) on standard
40cm (16 in) spacing. A cross brace (a noggin) should
be positioned directly above the subwoofer. The
subwoofer driver aperture should be located at the
bottom. See Figure 1.
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