The Problem

The holy grail of subwoofer design is deep and clean bass from a near-invisible box. The immediate problem that arises is that reduced box size both curtails bass extension and increases pressure on the enclosure wall and driver diaphragm.

Many small subwoofers are unable to reproduce sufficiently extended bass and suffer from considerable cabinet coloration, often resulting in bass that is uneven and dissociated from the midrange and treble.

Some existing designs have tried to address this problem by using complex, rugged drive units and very large amplifiers in small boxes, but have neglected to give sufficient consideration to the design of the enclosure. Typically, the huge backpressures and mechanical reaction forces generated by the heavy driver tend to deform the cabinet walls, which then resonate and distort the sound, particularly in relation to pitch definition.

Bracing the cabinet extensively certainly helps but to satisfactorily solve the problem, you have to change the design approach.

Pressure Vessel Concept

It is often the case that effective solutions to problems in one scientific discipline may be derived from work done in another. An example of that within B&W is the derivation of our dimpled Flowport design from the aerodynamics of a golf ball.

The Pressure Vessel takes its inspiration from deep-sea diving bells. Their characteristic curved form resists the pressure differences on each side of the walls to a much greater degree than flatter panels, however well braced they may be.

The trick is to change the way forces are distributed in the structure, from bending (i.e. at right angles to the panel) to being in the plane of the panel. After all, it's much harder to squash or stretch a panel along its length or width than to bend it.

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Bowers & Wilkins PV1 manual Problem, Pressure Vessel Concept
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PV1 specifications

Bowers & Wilkins has long been synonymous with high-quality audio equipment, and the PV1 subwoofer stands out as a compelling offering in its range. Launched with an elegant design and innovative technology, the PV1 not only delivers deep, resonant bass but also complements modern home aesthetics.

One of the main features of the Bowers & Wilkins PV1 is its unique driver configuration. The subwoofer is equipped with a pair of 8-inch drivers that are strategically positioned to optimize sound dispersion. This design enables the PV1 to produce powerful bass frequencies without distortion, making it an ideal choice for both music enthusiasts and movie lovers. The drivers work in tandem with a high-performance 250-watt digital amplifier that ensures dynamic and accurate sound reproduction across various genres.

The PV1's enclosure is another hallmark of its design. Constructed from rigid materials, the cabinet is shaped like an oval, which not only enhances its visual appeal but also helps reduce standing waves and internal resonances, resulting in cleaner sound output. This attention to detail ensures that listeners experience the full depth of low frequencies, immersing them in their favorite music and films.

Bowers & Wilkins has also incorporated its innovative Flowport technology in the PV1. This system features a specially designed port that minimizes turbulence caused by air movement, thereby reducing unwanted noise and allowing for a more nuanced bass response. This results in a clean, articulate low-end that enhances the overall listening experience.

Another significant characteristic of the PV1 is its adaptability. The subwoofer is equipped with adjustable settings, allowing users to tailor the bass response to suit their specific environments and preferences. Whether placed in a small room or a large open space, the PV1 can be calibrated to deliver optimal performance.

For ease of integration within home entertainment systems, the PV1 includes a range of connectivity options, including high-level and low-level inputs. This versatility makes it compatible with various audio setups, ensuring that users can enjoy high-quality bass regardless of their equipment.

In summary, the Bowers & Wilkins PV1 is a premium subwoofer that blends cutting-edge technology with sophisticated aesthetics. With its powerful drivers, innovative cabinet design, Flowport technology, and adaptability, it provides an exceptional listening experience that can satisfy the most discerning audiophiles. Whether for music or home theater use, the PV1 is an outstanding choice for those seeking superior bass performance.
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