Bowers & Wilkins PM1 Manual De Instrucciones página 8

5. Running In
The performance of any speaker may change subtly during the
initial listening period. If it has been stored in a cold environment,
the damping compounds and suspension materials of the drive
units will take some time to recover their correct mechanical
properties. The drive unit suspension will also loosen up during
the first hours of use. The time taken for the speaker to achieve
its intended performance will vary depending on previous storage
conditions and how it is used. As a guide, allow up to a week
for the temperature effects to stabilise and 15 hours of average
use for the mechanical parts to attain their intended design
characteristics.
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6. Aftercare
The cabinet surfaces will usually only require dusting. If you wish
to use an aerosol or other cleaner, apply the cleaner onto the
cloth, not directly onto the product and test a small area first,
as some cleaning products may damage some of the surfaces.
Avoid products that are abrasive, or contain acid, alkali or anti-
bacterial agents. Do not use cleaning agents on the drive units.
Avoid touching the drive units as damage may result.
Whenever Bowers & Wilkins speakers are finished in real wood,
the finest veneers are selected and treated with an ultra-violet
resistant lacquer to minimise changes in colour over time.
Nevertheless, like all natural materials, the veneer will respond to
its environment and a degree of colour change is to be expected.
Colour differences may be rectified by exposing all the veneer
surfaces equally and evenly to sunlight until the colour is uniform.
This process can take several days or even weeks, but may be
accelerated by careful use of an ultra-violet lamp. Wood veneered
surfaces should also be kept away from direct sources of heat
such as radiators and warm air vents in order to minimise the
possibility of the wood veneer cracking.