Bowers & Wilkins PV1 PV1/WIT 用户手册
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PV1/WIT
No corners, no straight lines. Our bubble is a
beautiful solution to the problems that plague
conventional subwoofers. In a normal, flat-sided
subwoofer, the tremendous air pressures generated
at higher output levels tend to stress the panels of
the cabinet, setting up resonances that can ruin
performance. In the PV1, those pressures are
dispersed evenly around a rigid, continuous shell,
reducing unwanted vibrations to a bare minimum.
The PV1’s added stability means it can be pushed
just that bit farther. The symmetrical mounting of its
twin drive units keeps the subwoofer perfectly
balanced and anchored to the floor. So there’s
no rattle when it rumbles. The back-to-back
arrangement also further improves the distribution
of pressure inside the speaker.
The drivers themselves are made of stern
stuff. A thick, three-layer composite of mica cone,
foam core and aluminium facing ensures that the
diaphragm retains its shape and remains heroically
true to the sound signal. Not only that, any extra-
neous vibrations that are produced inside the unit
are stopped dead in their tracks by such a formi-
dable acoustic barrier. All you hear is unimpaired
bass that expands and deepens every listening
experience. A big sound from a small box.
Since it has to hold a pair
of drive units and a handful
of electronics, our bubble
isn’t quite a perfect sphere.
Its curves, however, are in
all the right places. Advanced
computer analysis of the
PV1’s shape and construction –
plus a little inspiration from
the design of marine pressure
vessels – has allowed us
to iron out the effects of the
not-so-spherical sections.
Pushing the envelope
A look inside the PV1 reveals
the rugged nature of the drive
units and just how thin we
have been able to make the
walls of the enclosure in
order to maximise the internal
volume. But just touch the
walls when the PV1 is playing
loudly and you will feel no
vibration. Simple proof of
how well the pressure vessel
concept works.