Bowers & Wilkins 801 D5 Review: The Flagship 800 Series Diamond Floorstander, Refined

Few loudspeakers carry the weight of expectation that the 801 carries. It has been a fixture of serious listening rooms for generations, and each new iteration is judged against its own formidable legacy. In this Bowers & Wilkins 801 D5 review, we look closely at what makes the new flagship of the 800 Series Diamond range so compelling, from its 25 mm Diamond dome tweeter and Continuum cone FST midrange to its twin 250 mm Aerofoil bass drivers and heavily reinforced Matrix cabinet. If you have been waiting for a passive loudspeaker that combines reference-grade accuracy with genuine scale, the Bowers & Wilkins 801 D5 deserves your full attention.

Bowers & Wilkins 801 D5 Review at a Glance

The 801 D5 is a three-way, vented-box reference floorstander. It stands 1,221 mm tall including tweeter and plinth, weighs a substantial 106.4 kg, and offers a ±3 dB frequency response of 15 Hz to 28 kHz, extending to 13 Hz and 35 kHz at -6 dB. Sensitivity is rated at 90 dB (2.83 Vrms/1 m), nominal impedance is 8 ohms with a 3.0-ohm minimum, and Bowers & Wilkins recommends amplification from 50 to 1,000 watts into 8 ohms on unclipped programme.

Those numbers tell you this is a loudspeaker designed without compromise: deep, room-energising low-frequency extension from a passive design, treble that extends well beyond the audible band, and distortion figures that remain impressively low across the range. But the real story lies in how each element works together.

The Diamond Dome Tweeter: Air, Openness and Precision

At the very top of the 801 D5 sits Bowers & Wilkins’ signature 25 mm Diamond dome tweeter. Its defining engineering achievement is a break-up frequency of approximately 70 kHz. Every dome material eventually stops behaving as a perfect piston and begins to flex; by pushing that point so far beyond human hearing, any resulting distortion is kept well clear of the audible range.

The practical benefit is treble that sounds effortless rather than etched. Cymbal decay, the rosin bite of a bowed violin, the breath around a vocalist’s phrasing, all are rendered with clarity and openness, but without the hardness that can make lesser tweeters fatiguing over long sessions.

The tweeter lives in a Solid Body Tweeter-on-Top enclosure, physically decoupled from the main cabinet. This isolation keeps it away from the mechanical energy generated by the bass drivers, while the carefully shaped housing minimises diffraction. Less diffraction means fewer secondary reflections smearing the arrival of high-frequency information, and that translates directly into sharper, more stable stereo imaging.

Continuum Cone FST Midrange and the Turbine Head

If the tweeter is the 801 D5’s sparkle, the midrange is its soul. A dedicated 150 mm Continuum cone FST driver handles the frequencies where voices and most acoustic instruments live, and it does so with remarkable neutrality.

The Continuum cone is engineered to avoid the abrupt transitions in behaviour common to conventional cone materials. Rather than shifting suddenly from pistonic motion into break-up, it behaves in a smoother, more controlled manner. The result is a midrange that sounds natural and unforced: vocals have presence and body, piano has correct weight and timbre, and complex orchestral textures remain intelligible rather than congealing.

That driver is mounted in the distinctive Turbine Head, an acoustically optimised enclosure shaped to minimise internal resonance and provide an exceptionally stable platform. Separating the midrange from the bass cabinet is one of the enduring secrets of the 800 Series sound, and it remains central to the 801 D5’s transparency.

Biomimetic Suspension and Anti-Resonance Plug

In place of a conventional fabric spider, the midrange uses Bowers & Wilkins’ Biomimetic Suspension. This reduces unwanted air pressure and noise at the rear of the cone, the kind of low-level contamination that masks fine detail. Remove it, and the micro-dynamics of a performance emerge more clearly: the faint intake of breath before a lyric, the subtle shifts of a fingerpicked guitar. An Anti-Resonance plug further tames unwanted movement, keeping driver behaviour tightly controlled.

Dual 250 mm Aerofoil Bass Drivers: Authority Without Excess

Low-frequency duties fall to a pair of 250 mm Aerofoil bass cones. The Aerofoil profile varies the cone structure so it remains rigid under the stresses of demanding passages. Rigidity is everything in bass reproduction: a cone that flexes under load produces distortion and loses definition.

With a ±3 dB response reaching 15 Hz, and 13 Hz at -6 dB, the 801 D5 delivers genuinely subterranean extension from a passive loudspeaker. Crucially, that depth arrives with control. Pipe organ pedal notes have physical presence, synthesiser sub-bass is felt as much as heard, and double bass lines retain pitch definition and texture rather than dissolving into boom or overhang. This is bass that underpins music rather than overwhelming it.

Flowport Bass Reflex

Supporting those drivers is Bowers & Wilkins’ Flowport technology. Inspired by the dimpled surface of a golf ball, the textured port reduces turbulence as air moves through it. Less turbulence means less chuffing and port noise, so bass stays clean and controlled even at high volume or on recordings packed with low-frequency energy.

Upgraded Matrix Cabinet: The Quiet Foundation

A loudspeaker cabinet should be heard as little as possible. The 801 D5 approaches this ideal with an enclosure engineered from the ground up for acoustic silence. Internally, Bowers & Wilkins’ Matrix bracing uses interlocking panels to stiffen the structure and suppress vibration that would otherwise colour the sound.

For the D5 generation, the Matrix is complemented by aluminium Space Frame Bracing and an aluminium upper cabinet section. These refinements produce a quieter, more rigid enclosure, and a quieter enclosure means a blacker background from which musical detail can emerge, along with a more spacious, precisely focused soundstage.

The cabinet itself is formed from a continuous curve rather than a flat-fronted box. This shape helps reduce internal standing waves and external reflections around the drive units, while a solid aluminium spine reinforces the rear. Combined with the separate Tweeter-on-Top and Turbine Head enclosures, every element is designed around one goal: letting the drivers speak without interference.

How the 801 D5 Presents Music

Bring all of this engineering together and you arrive at a loudspeaker defined by three qualities: clarity, scale and realism. The low distortion figures, under 1% from 30 Hz to 20 kHz and under 0.3% across the critical 100 Hz to 8 kHz band, speak to a presentation that remains composed whether you are listening to a solo voice at late-night levels or a full symphony at concert-hall volume.

The separated driver enclosures and low-diffraction design encourage a soundstage that extends well beyond the physical boundaries of the cabinets, with instruments placed with pinpoint precision. Meanwhile, the combination of 90 dB sensitivity and deep bass extension gives the 801 D5 the dynamic headroom to reproduce the leap from pianissimo to fortissimo with genuine conviction. This is a speaker that communicates both the fine detail and the sheer physicality of live music.

Amplifier Matching and System Building

With 90 dB sensitivity and an 8-ohm nominal impedance, the 801 D5 is more approachable than its size suggests, and the recommended amplifier range of 50 to 1,000 watts gives you enormous flexibility. That said, its 3.0-ohm minimum impedance means it rewards a high-quality amplifier with stable, generous current delivery. Pair it with a capable power amplifier and the 801 D5 reveals its full potential in control, dynamics and bass grip.

Bowers & Wilkins also specifies a maximum recommended cable impedance of 0.1 ohm, so quality speaker cable is part of the equation. Building a system around a flagship like this is where expert guidance pays off. Our team at The Audio Tailor can help you match amplification, sources and cabling to your room and listening preferences. Give us a call on 1300 308 711 for a chat.

Finishes and Craftsmanship

The 801 D5 is available in four premium finishes: Stealth Black, Warm White, Light Walnut and Dark Walnut. Stealth Black and Dark Walnut models include black grilles, while Warm White and Light Walnut are supplied with grey grilles. Every version is finished with matching Leather by Connolly trim, a touch of luxury that reflects the care lavished on these loudspeakers. They are as much a statement of design as they are of engineering.

Who Is the Bowers & Wilkins 801 D5 For?

• The dedicated two-channel listener seeking a genuine reference loudspeaker with accuracy, scale and realism as priorities.
• Owners of large or dedicated listening rooms who want full-range bass extension from a passive speaker without necessarily adding subwoofers.
• Those upgrading within the 800 Series family who want the flagship’s twin 250 mm bass drivers and ultimate authority.
• Classical, jazz and acoustic enthusiasts who value timbral truth and midrange transparency.
• Rock, electronic and film score lovers who crave dynamic headroom and deep, controlled bass.
• Audiophiles who appreciate craftsmanship and want a loudspeaker that looks every bit as exceptional as it sounds.

Pros and Cons

Pros

• Flagship reference performance from the 800 Series Diamond range
• 25 mm Diamond dome tweeter with break-up pushed to approximately 70 kHz for clean, open treble
• Continuum cone FST midrange delivers exceptionally natural, neutral vocals
• Biomimetic Suspension reveals fine low-level detail
• Dual 250 mm Aerofoil bass drivers reach 15 Hz (±3 dB) with tight control
• Upgraded Matrix bracing, aluminium Space Frame Bracing and aluminium spine for a remarkably quiet cabinet
• Decoupled Tweeter-on-Top and Turbine Head enclosures for precise imaging
• Flowport technology for clean bass at high volume
• 90 dB sensitivity and wide 50 to 1,000 W amplifier compatibility
• Low harmonic distortion across the audible range
• Four luxurious finishes with Leather by Connolly trim

Cons

• At 106.4 kg each, a two-person (at least) installation job
• A 3.0-ohm minimum impedance means it deserves a quality amplifier to truly shine, though that is part of the fun
• Its scale and bass authority are best enjoyed in a room that can let it breathe

Technical Specifications

• Product type: Reference floorstanding loudspeaker
• Enclosure design: Three-way vented-box system
• High-frequency driver: 1 × 25 mm Diamond dome tweeter
• Midrange driver: 1 × 150 mm Continuum cone FST
• Bass drivers: 2 × 250 mm Aerofoil bass cones
• Frequency range: 13 Hz to 35 kHz (-6 dB)
• Frequency response: 15 Hz to 28 kHz (±3 dB)
• Sensitivity: 90 dB (2.83 Vrms/1 m)
• Nominal impedance: 8 ohms
• Minimum impedance: 3.0 ohms
• Recommended amplifier power: 50 to 1,000 W into 8 ohms on unclipped programme
• Maximum recommended cable impedance: 0.1 ohm
• Harmonic distortion: <1% from 30 Hz to 20 kHz; <0.3% from 100 Hz to 8 kHz
• Height: 1,221 mm including tweeter and plinth
• Cabinet width: 372 mm (447 mm including plinth)
• Depth: 556 mm including grille and terminals (597 mm including plinth)
• Net weight: 106.4 kg
• Finishes: Stealth Black, Warm White, Light Walnut, Dark Walnut

The 801 D5 Verdict: A Flagship That Earns Its Crown

The Bowers & Wilkins 801 D5 is everything a flagship should be. It takes the proven 800 Series formula of a Diamond tweeter, a decoupled Continuum midrange and a rigid Matrix cabinet, then refines it further with aluminium Space Frame Bracing, an aluminium upper cabinet, Biomimetic Suspension and a pair of formidable 250 mm Aerofoil bass drivers. The result is a loudspeaker that marries microscopic detail with breathtaking scale, delivering music with the clarity, authority and realism that serious listeners crave.

If you are building a reference-level system, or simply want to experience what one of the world’s most celebrated loudspeakers can do, this is a destination product. Explore the Bowers & Wilkins 801 D5 on our website, and when you are ready to talk amplifier pairing, room setup or finishes, our team of Stuart, Gabby, Nathan and Vaughan is here to help. Call us on 1300 308 711 or email sales@theaudiotailor.com.au. We ship nationwide, so wherever you are in Australia, your 801 D5 journey can start with a simple conversation.