Bowers & Wilkins 801 D4 — Overview
| Main Specifications | Details |
|---|---|
| Type | 3-way bass reflex |
| Drive Units | 1x 25mm Diamond dome tweeter 1x 150mm Continuum cone FST midrange 2x 250mm Aerofoil cone bass units |
| Frequency Response | 15Hz - 28kHz (±3dB) |
| Sensitivity | 90dB (2.83Vrms/1m) |
| Nominal Impedance | 8Ω (minimum 3.0Ω) |
| Harmonic Distortion | <0.3% (100Hz – 20kHz, 90dB/1m) |
| Recommended Amplifier Output | 50W – 1000W (8Ω) |
| Dimensions (H x W x D) | 1221mm x 451mm x 600mm |
| Weight | 100.60kg |
| Source: 20 |
I. Introduction: The Weight of Legacy
In the world of audio, there are certain components that transcend the mere category of “product” and exist as cultural and technical icons. Since its debut in 1979, Bowers & Wilkins’ 801 model has unquestionably earned a place at the top of that list 1. It is not simply a loudspeaker. With a history of adoption as a reference monitor in the world’s finest recording facilities, including Abbey Road Studios, it is a “benchmark” in acoustic reproduction that has defined the very field of music production and a “standard” by which other high-end designs are judged 3.
The 801 D4, which we analyze in this article, is the latest generation of that illustrious bloodline and should not be viewed as a mere update. It represents the current culmination of over 40 years of relentless pursuit of acoustic perfection 2. This review will dissect its refined engineering, analyze its performance from both subjective and objective perspectives, and examine whether the 801 truly inherits and advances its formidable legacy in today’s fiercely competitive landscape.
This article is structured as follows: First, we trace its history of innovation, then dive deep into the technologies unique to the D4 generation, and critically analyze its sound. Furthermore, we provide a detailed comparison with the ultimate Signature model and clarify the 801’s positioning in the current high-end market, offering a complete portrait of this monumental speaker.
What is crucial to understanding the 801 is that it is not merely B&W’s flagship product. It has functioned as a primary platform for the company’s research and development. Each generation of the 801 has been a showcase for B&W’s most advanced and uncompromising technology available at that time, with established technologies later cascading down to more accessible product lines such as the 700 and 600 series 6. As the original model was born under the mission of developing the best speaker “with complete disregard for the so-called ‘practical considerations’ that necessarily compromise conventional design,” its position is clear 2. The Matrix structure, Nautilus tube loading, Diamond dome, and Continuum cone—all the revolutionary technologies that define B&W’s history were first realized in the 800 series 1. Therefore, analyzing the 801 D4 is not limited to evaluating a single product; it is nothing less than examining the cutting edge of Bowers & Wilkins’ technical philosophy.
II. Genealogy of Innovation: Evolution to the D4 Platform
Related Reviews: The 800 Series Legacy
B&W Nautilus Review: A 30-Year-Old Acoustic Sculpture Between Legend and Reality
A comprehensive examination of the Bowers & Wilkins Nautilus through three decades of evolution, technical innovation, measurement data, and historical context—evaluating its value as both an acoustic sculpture and modern high-end speaker.
B&W 805 D4 Review: Form Follows Function, Yet Sound Follows Soul
Though the smallest model in B&W's 800 Series, the Bowers & Wilkins 805 D4 represents the most concentrated expression of the flagship's design philosophy. A thorough examination of the sonic achievements wrought by diamond tweeter, Continuum cone, and reverse-wrap cabinet, and the true value of its distinctly clear and engaging sound signature.
To understand the true value of the 801 D4, we must trace the path built by its innovative ancestors. Its history is a narrative of continuous improvement, with each generation pushing the boundaries of acoustic reproduction.
Genesis (1979): A Paradigm Shift
The debut of the original 801 was a paradigm shift in the world of speaker design. At a time when much design relied on trial and error, B&W adopted an unprecedented approach: using computer modeling and laser interferometry to analyze driver unit behavior 2. From this scientific approach emerged the iconic 3-box design, housing bass, midrange, and treble in independent enclosures. This was a result of rigorously adhering to the principle of “form follows function,” a configuration derived from the acoustic necessity to minimize inter-unit interference. This fundamental philosophy remains alive in today’s 801 D4 1.
The Era of Rigidity (1987): The Matrix Revolution
The Matrix 801, announced in 1987, opened new horizons in speaker design. Having identified cabinet resonance as a primary cause of sonic coloration, B&W’s engineers developed the “Matrix structure”—a lattice of internal bracing 1. This dramatically increased enclosure rigidity and successfully suppressed unwanted vibrations. This invention prompted the entire industry to recognize the importance of cabinet inertness and established B&W’s long-standing obsession with “cabinet silence” 9.
Organic Forms (1990s): The Nautilus Influence
The “Nautilus,” unveiled in 1993 with its snail-like sculptural design, boldly demonstrated B&W’s technical possibilities. In particular, the “tube loading technology,” which absorbs and dissipates driver back pressure through a tapered tube, was groundbreaking and greatly influenced the subsequent 800 series 1. This technology was incorporated as a tweeter-on-top housing extending rearward, and cabinet shapes evolved from traditional boxes to more organic, curved forms.
The Age of Materials Science (2005–2015): Diamond and Continuum
Entering the 21st century, B&W’s innovation delved deeply into the realm of materials science.
Diamond Tweeter (D1/D2)
In 2005, the 800 series first bore the “Diamond” name. The high-frequency tweeter diaphragm employed synthetically grown diamond 1. Diamond’s unparalleled stiffness-to-weight ratio enabled pushing breakup frequency far beyond the human audible range, above 70 kHz 1. This achieved unprecedented levels of high-frequency transparency and resolution.
Continuum Cone (D3)
The D3 series, introduced in 2015, marked a departure from the long-iconic yellow Kevlar midrange cone. Replacing it was the “Continuum cone,” a new composite woven material developed in-house over eight years 2. With more controlled breakup characteristics than Kevlar, this new material dramatically improved midrange transparency, reaffirming B&W as a vertically integrated manufacturer conducting everything from material development to driver manufacturing 4.
III. The Science of Sound: Deep Dive into D4 Architecture
The 800 D4 series, announced in 2021, may appear similar to the D3 series externally, but internally, nearly every component has been redesigned—a comprehensive engineering crystallization 11. Development began immediately after the D3 release, representing the forefront of B&W’s technological evolution 12.
Cabinet: Foundation of Silence
Reverse Wrap Cabinet
In the D4 series, the “Reverse Wrap Cabinet” structure, previously limited to top models, was adopted across all stereo pair models 11. This is a technique that heat-bends and pressure-forms multiple wood layers to create a monolithic shell. By minimizing seams and reducing frontal baffle area, it reduces sound diffraction and achieves superior acoustic radiation characteristics 10.
Ultimate Matrix™
The long-traditional Matrix structure evolved to its ultimate form in the D4. In addition to the conventional plywood lattice structure, newly incorporated are 5mm-thick steel plates and robust aluminum vertical and horizontal sections, with the entire frame rigidly coupled to the baffle 3. This delivers phenomenal rigidity against stress from every direction, bringing unwanted cabinet vibrations practically to zero 11.
Aluminum Top Plate & Plinth
The enclosure’s top surface now adopts a solid aluminum top plate. This is not mere decorative trim but a structural member enhancing overall cabinet rigidity, providing a more stable platform for the head assembly mounted atop 12. The surface is covered in luxurious leather from Connolly, the renowned British supplier that also furnishes leather to Ferrari and Aston Martin 1. The speaker’s plinth (base) is also solid aluminum, incorporating a constrained-layer damping structure with an internal steel damping sheet, ensuring rock-solid stability 14.
Head Assembly: Vocal Isolation
Turbine™ Head
The teardrop-shaped midrange enclosure, the “Turbine Head,” is solid aluminum balancing rigidity and appropriate damping. In the D4, internal damping material has been improved, and the decoupling mechanism from the bass cabinet has been further refined, thoroughly eliminating vibration transmission to the midrange 6.
Solid Body Tweeter-on-Top
The tweeter is housed in a housing machined from a single aluminum billet. In the D4, this housing has been extended to approximately 30 cm (12 inches), forming a longer tube loading system 10. This more effectively absorbs and attenuates unwanted energy radiated rearward from the tweeter diaphragm, achieving a more open and liberated high-frequency reproduction 12.
Drivers: Heart of Sound
Diamond Dome Tweeter
The D4’s Diamond dome tweeter features an improved motor system, changed from three to two neodymium magnets. Furthermore, by enhancing voice coil ventilation, air compression behind the dome is reduced, allowing freer movement 12.
Aerofoil™ Cone Bass Unit
The “Aerofoil” composite material cone, developed using computer modeling with variable cross-sectional thickness like an airfoil, has also evolved. The D4 woofers incorporate a new foam anti-resonance plug preventing voice coil deformation, and the motor system has been upgraded to handle higher currents 12.
Breakthrough: Biomimetic Suspension
The most groundbreaking innovation in the D4 series, with immense impact on sound quality, is this “Biomimetic Suspension.” This is a breakthrough B&W reached after nearly 15 years of research and development 4.
Traditionally, a cloth “spider (damper)” was essential to support the midrange driver’s voice coil. However, B&W engineers identified that this spider itself moved back and forth with the cone’s motion, generating unwanted air pressure fluctuations and intrinsic noise, thereby compromising midrange transparency 11.
Biomimetic Suspension completely eliminates this traditional cloth spider, instead adopting an open frame structure composed of minimal skeletal elements 3. This “biomimetic” suspension maintains the original function of accurately centering the voice coil while fundamentally removing the parasitic noise caused by the spider. B&W’s claim of “incredible midrange transparency” is achieved precisely through this revolutionary technology 6.
Crossover: Brain of Operations
In the D4 series, the crossover network has been relocated inside a robust aluminum spine at the cabinet rear, doubling as a heatsink 14. This change offers three clear advantages. First, it physically isolates delicate electronic components like capacitors from the powerful acoustic pressure fluctuations inside the cabinet. Second, it liberates the volume previously occupied by the crossover for woofer use. Third, the aluminum spine functions as an effective heatsink, stabilizing component temperatures even during high-power input, maintaining optimal performance 4.
IV. Tapestry of Sound: Subjective Listening Impressions
How do these numerous technological innovations manifest in the 801 D4’s sound? Integrating reviews from worldwide experts reveals a vivid sonic portrait.
Overall Character: Studio Monitor Bloodline
The 801 D4’s sound is described as filled with “absolute conviction and positivity” 6. It delivers “every last shred of information contained in a recording, in full, with the sort of immediacy that can be literally hair-raising” 6. This means that while it draws out the virtues of excellent recordings, it also mercilessly exposes the flaws of poor recordings. “What is there is heard as is” 18. This fidelity strongly reflects its origins as a professional studio monitor.
Soundstage and Imaging: A Holographic Window
Consistently praised in reviews is the ability to reproduce a vast, detailed, and unwavering stereo image. The soundstage makes listeners forget the speakers’ physical presence, expanding broadly across three dimensions of height, width, and depth 13. Instruments and vocals are pinpointed precisely, and their front-to-back relationships are clearly delineated. This exceptional spatial reproduction ability is a gift of the cabinet’s ultimate inertness, thorough unit decoupling, and excellent off-axis characteristics 1.
Bass Response: Balancing Power and Finesse
The bass delivered by two 250mm (10-inch) Aerofoil cones extends down to 15Hz (-3dB) as specified, with a “mountainous” scale 8, while simultaneously being rated as “precise, powerful, and impactful” 21. Importantly, that overwhelming power is always under strict control. Reviews line up descriptions such as “tight,” “punchy,” and “surprisingly controlled,” suggesting it is entirely free from the boominess often associated with large speakers 22. However, inappropriate room placement or pairing with underpowered amplifiers can compromise this potential, leading to reports of “bass boom” 21.
Midrange Purity: Realization of the Biomimetic Revolution
It is no exaggeration to say that the D4 series’ true forte lies in this midrange. Its sound is hailed as incredibly transparent, fast, and pure 22. One reviewer stated, “There is a complete absence of distortion throughout the midrange,” expressing astonishment at its “speed and clarity” unlike anything heard before 1. This is the auditory achievement brought by Biomimetic Suspension, creating a sensation as if a veil of sound, once taken for granted, has been peeled away.
High-Frequency Extension and Detail: Diamond Brilliance
The Diamond dome tweeter provides “incomparable acoustic detail, naturalness, and extension” 14. With the evolution to the D4 generation, reviews note that “the slight edginess in the highs occasionally pointed out in older generations has been eliminated” 21. On the other hand, some measurements and listening reports also point out that the high-frequency balance is “slightly on the brighter side than neutral” 26, making setup adjustments such as speaker toe-in angle and listening position height critically important for achieving preferred balance 18.
Dynamics and Transient: Authority of Margin
The 801 D4 possesses the ability to effortlessly delineate every dynamic range, from subtle sonic nuances to “terrifyingly loud” crescendos 13. Particularly impressive is the “effortless yet dynamic snap” from midrange through lower treble, with astonishing speed in attack and decay 1.
This speaker presents an intriguing paradox. Its technical design and acoustic characteristics are highly analytical, exposing every flaw in a recording. Yet, the overwhelming consensus in reviews is that the experience is not cold or sterile, but deeply musical, emotional, and captivating 10. This suggests that B&W has achieved the rare balance where “ultimate resolution serves the music itself, rather than dissecting it.” Bringing speaker-induced distortion (cabinet resonance, driver coloration, spider noise) as close to zero as possible does not produce a sterile sound; rather, it removes the barrier between the listener and the emotion embedded in the recording. The “magic” brought by the 801 D4 is not added value from the speaker, but a “revelation” of what was already present in the recording. This is precisely the defining characteristic of modern super speakers.
Listening Impressions
| Reviewer / Publication | Quote (English) |
|---|---|
| The Absolute Sound | ”a loudspeaker without any musically consequential deficiencies” |
| Stereophile | ”They make old favorites new again by revealing previously unheard details.” |
| Wired | ”The sound of the 801 D4 is one of absolute conviction and positivity. Every last shred of information contained in a recording is handed over, in full, with the sort of immediacy that can be literally hair-raising.” |
| SoundStage! Ultra | ”There’s an effortless, dynamic snap that these speakers exude from the midrange right up through the lower treble. The speed of the 801’s midrange and tweeter as they combine to launch a wave is like nothing I’ve heard.” |
| AudioShark Forum | ”The improvements made in the latest version of these speakers has eliminated the last bit of edginess that existed in the treble. The transparency, neutrality, detail and imaging of the midrange and treble is right there with best speakers on the market.” |
V. The Difference Called Signature: Quest for Perfection
In B&W’s lineup, the “Signature” name holds special meaning. It is a title bestowed only upon “optimized” versions where B&W invests all its knowledge and technology without constraint, based on an existing model 16. It represents the fruit of a perfectionist quest where, even if each gain is marginal, their accumulation elevates performance from “excellence” to the realm of “the extraordinary” 16.
Elevation of Aesthetics and Materials
Dedicated Finishes
The Signature model asserts its presence visually as well. Two special finishes are offered: “Midnight Blue Metallic,” requiring 11 layers of paint and lacquer finished over 18+ hours, and “California Burl Gloss,” using ALPI veneer with 14 layers of lacquer finished over 24+ hours 1.
Connolly Leather
The aluminum top plate surface is covered in full-grain leather from Connolly, renowned for supplying interiors to ultra-luxury cars like Aston Martin and Ferrari 1.
Technical and Sonic Enhancements
Upgraded Cabinet Structure
The Signature’s aluminum top plate features an optimized skeletal structure (lightening cuts) to further reduce resonance, with Techsound viscoelastic damping material strategically placed internally 16.
More Open Tweeter Grille
The tweeter protective mesh grille, after 25 prototypes, adopts a newly designed pattern maximizing acoustic transparency while maintaining rigidity. This allows more high-frequency energy to radiate into the listening room 28.
Improved Bass Drivers
The two 250mm Aerofoil bass units have upgraded motor systems. Using improved steel materials for the top and mid plates reduces inductance, further suppressing current distortion 1.
Cast Aluminum Ports
The flow port flares radiating downward from the cabinet bottom have been changed from standard plastic to cast aluminum. This improves rigidity and quietness, contributing to cleaner, more accurate bass reproduction 19.
Upgraded Crossover
The crossover network employs higher-quality bypass capacitors, doubled from four to eight. This further enhances sonic purity 16.
Impact on Sound Quality
Reviewers comparing both models conclude that the Signature version is “better in every way.” The improvement is “subtle at first but reveals its profundity the more you listen” 13. Specifically, it is described as “a larger, cleaner window into the recording,” yielding “crisper bass, more detailed and intimate midrange, and more vivid highs” 13.
Table 1: B&W 801 D4 vs. 801 D4 Signature — Key Differences
This comparison table provides essential information for potential buyers considering an extremely substantial investment. It clearly and concisely lists specific upgrade items justifying the significant price difference (approximately $14,000 USD) between the standard and Signature models.
| Feature | 801 D4 (Standard) | 801 D4 Signature (Upgraded) |
|---|---|---|
| Price (Pair) | Approx. $46,000 USD 6 | Approx. $60,000 USD 16 |
| Finish | Gloss Black, White, Satin Rosenut, Satin Walnut 6 | Midnight Blue Metallic, California Burl Gloss 16 |
| Top Plate Trim | Standard leather 19 | Connolly full-grain leather 16 |
| Cabinet Top Plate | Solid aluminum 14 | Optimized aluminum with lightening cuts and damping material for resonance control 16 |
| Tweeter Grille | Standard fixed steel mesh 28 | New mesh pattern design for greater acoustic openness 28 |
| Bass Driver Motor | Standard Aerofoil motor system 30 | Upgraded motor system with improved steel components 1 |
| Bass Port Flare | Plastic 1 | Cast aluminum 1 |
| Crossover | High-quality components 6 | Doubled use of higher-quality bypass capacitors 16 |
VI. Objective Perspective: Measurements and Analysis
Objective data supporting subjective impressions is essential to understanding a speaker’s true performance. Here, we analyze detailed measurement results from specialist publications.
Amplifier Challenge: Impedance and EPDR
While the nominal impedance is stated as 8Ω, the actual load characteristics are far more complex 6. According to Stereophile measurements, the minimum impedance drops to 2.7Ω at 83Hz 26.
However, a more important metric in modern speaker evaluation is EPDR (Equivalent Peak Dissipation Resistance), which considers both impedance magnitude and phase angle, indicating the practical load for an amplifier. The 801 D4 Signature’s EPDR records extremely low values: 1.24Ω at 65Hz and 1.41Ω at 600Hz 26. This objectively demonstrates that this speaker is a highly “current-hungry” load.
This measurement data scientifically explains why reviewers and users cite a powerful amplifier with high current delivery capability as mandatory 10. If an amplifier unable to stably supply current to such low impedance loads is used, audible degradation such as sonic compression, loss of bass damping, and frequency response changes will be prominent 10.
Frequency Response and Directivity
On-axis and off-axis frequency response graphs show an overall balance slightly tilted toward the highs, with presence region energy (around 2–4 kHz, where human hearing is most sensitive) somewhat restrained 26. This characteristic may contribute to the “bright but not harsh” character in subjective impressions.
Horizontal directivity is very uniform, with minimal frequency balance collapse even off-axis 26. This is objective evidence supporting the subjectively reported stable, clearly defined, and expansive soundstage. Bass extension is also confirmed by measurements, with a -6dB point at 19Hz—a remarkable value demonstrating the manufacturer’s claims are not exaggerated 34.
Time Domain Performance: Coherence and Speed
The step response graph shows all driver units connected in positive acoustic polarity, with output from each driver smoothly connecting to the next 26. This is objective proof of excellent driver integration and temporal coherence achieved.
Looking at the cumulative spectral decay (waterfall) plot, decay in the tweeter’s coverage region is very clean 26. This correlates with audible clarity and smooth, grit-free high-frequency texture.
Distortion
At a substantial 90dB SPL, harmonic distortion records world-class, extremely low values under 0.3% from 100Hz to 20kHz 6. This low distortion undoubtedly forms the foundation of the speaker’s phenomenal transparency and clarity.
VII. The Art of Synergy: System Matching, Installation, and Practicality
To fully unleash the 801 D4’s potential, meticulous attention must be paid not only to the speaker itself but also to its surrounding environment.
Amplifier: A Non-Negotiable Requirement
Both objective measurements (low EPDR) and subjective listening experiences indicate that a powerful amplifier with high current delivery capability is not “recommended” but “mandatory” 26. Prospective buyers should budget for amplification investment of comparable quality and power to the speaker itself to fully extract its performance. Driving this speaker with underpowered amplification will significantly compromise performance, leading to deep disappointment. User forums actively discuss compatibility with various brands including McIntosh, Classé, and Block Audio 21.
Room and Installation: Taming the Power
With imposing dimensions of 1221mm height, 451mm width, 600mm depth, and 100.6kg weight, the 801 D4 moves substantial air 3. To let it fully demonstrate this capability and properly integrate powerful bass into the room, a medium-to-large listening room is desirable. Reports of “bass boom” when placed in overly cramped rooms at audio shows suggest this speaker demands adequate space 21.
For installation, maintaining sufficient distance from walls is the first step to avoiding excessive bass emphasis. Furthermore, as reviewers point out, fine-tuning toe-in angle and listening position height is critically important for optimizing high-frequency balance and soundstage focus 18.
Warranty and Long-Term Support
B&W offers a 5-year product warranty for passive speakers 35. Support, both within and beyond the warranty period, is available through authorized dealers and distributors in each country 36. For out-of-warranty and vintage models, services by certified third-party repair specialists also exist 38.
VIII. The Summit of Sound: Market Context and Competitive Analysis
Related Reviews: Competing Speakers
YG Acoustics Hailey 2.2 Review: When the Machine Disappears and Music Manifests
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Rockport Technologies Orion Review: The Apex of Non-Resonance Philosophy
An exhaustive examination of Rockport Technologies' semi-flagship floor-standing speaker 'Orion', featuring an absolutely non-resonant cabinet structure weighing over 163kg, analyzed through technical background and rich listening impressions.
TIDAL Audio Akira Review: Eternal Transparency in the World's Largest Diamond Diaphragm
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Alsyvox Botticelli Review: An Acoustic Renaissance Through Planar Drive
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The 801 D4 reigns at the apex of B&W’s regular production line, competing in the elite “super speaker” category where engineering, materials, and performance are pursued to the extreme.
Competitive Product Overview
Major competitive products at comparable price points and performance levels include the following models.
Wilson Audio Sasha V
The Sasha V (predecessor: DAW) is known for temporal accuracy (adjustable modules), dynamic and “live” sound, and proprietary composite material cabinets (X-Material, S-Material) 40. Some listeners describe it as having a “warmer” or more “musical” character 42.
Magico S3 Mk III
Magico represents a different design philosophy: ultimate cabinet inertness via all-aluminum sealed enclosures and advanced driver technology using materials like graphene and diamond-coated beryllium 44. Its sound is rated as extremely neutral, transparent, and fast, though sometimes perceived as less forgiving and “cooler” in tonality compared to competitors 42.
Focal Scala Utopia Evo
Focal is known for high sensitivity, beryllium inverted-dome tweeters, and “W” sandwich cones 47. Its sound is praised as highly detailed, dynamic, and expressive, with a distinctive “house sound” emphasizing clarity and immediacy 48.
Sonic Character Comparative Analysis
Choosing a speaker at this level is not merely about performance superiority or inferiority, but rather a choice of acoustic philosophy. Each model attempts to approach the truth of music through different methods.
- B&W 801 D4’s Position: The 801 D4 is a “truth seeker” with studio monitor heritage. Its greatest strengths lie in the revolutionary midrange transparency brought by Biomimetic Suspension and resolution that exposes every corner of recordings. However, due to this honesty, it mercilessly reveals shortcomings in source and upstream components. Additionally, the slightly high-frequency-emphasized balance in measurements is sensitive to setup, and some listeners may perceive it as “bright.” Forum discussions suggest that this B&W house sound can be polarizing for listeners seeking stricter neutrality.
- vs. Wilson Audio Sasha V: Wilson can be described as a “live experience director.” The Sasha V excels at recreating the “live” experience of music with temporal accuracy from its adjustable modules and dynamic, energetic sound. Compared to B&W, it is often described as having a “warmer” and more musical character, likely stemming from intentionally tuned frequency characteristics (slight mid-bass richness and softer highs). This voicing is advantageous in making many recordings sound pleasant, though listeners seeking the strict fidelity pursued by B&W or Magico might view it as a form of “coloration.”
- vs. Magico S3 Mk III: Magico is a “seeker of silence.” The all-aluminum sealed enclosure pushes cabinet inertness—what B&W aimed for with Matrix structure—to extremes through a different approach. The result is phenomenal transparency where background noise is extremely low and minute details emerge. Its sound is rated as the most neutral and linear among competitors. However, as a trade-off, the sealed design’s overly tight bass can feel insufficient to listeners who prefer the quantity and “punch” of B&W’s ported design. Furthermore, its extreme resolution demands high system quality, with the risk of sounding “sterile” or “cool” when poorly matched.
- vs. Focal Scala Utopia Evo: Focal is an “expresser of passion.” Armed with beryllium tweeters and high sensitivity, it delivers vivid, dynamic, and detail-rich sound. Its presentation has an assertiveness that comes even more forward than B&W, with an appeal that directly conveys music’s energy and passion. However, this distinct “house sound” is a double-edged sword. Some listeners perceive its high-frequency character as “bright” or “stimulating,” pointing to potential listening fatigue during extended sessions. This may contrast with the D4 generation’s praised elimination of older generations’ “edginess.”
In conclusion, the 801 D4 achieves an exceptionally high-level balance of analytical accuracy and musical richness—seemingly contradictory elements. Wilson excels at passionate, live experiences; Magico at silent, pure soundfields; and Focal at vivid, dynamic expression. Which speaker is “best” ultimately comes down to the philosophical question of what the listener values most.
Table 2: B&W 801 D4 vs. Major Competitors — Snapshot of Philosophy and Technology
This comparison table provides important market context for understanding the 801 D4’s unique value proposition. Comparing each brand’s core design philosophy, materials used, and key specifications demonstrates that multiple approaches exist to achieve cutting-edge sound, each with unique character and trade-offs.
| Feature | Bowers & Wilkins 801 D4 | Wilson Audio Sasha V (DAW basis) | Magico S3 Mk III | Focal Scala Utopia Evo |
|---|---|---|---|---|
| Core Philosophy | Refinement via iterative engineering, cabinet inertness, proprietary drivers | Time-domain coherence, modular design, proprietary composites | Materials science, sealed aluminum enclosure, ultimate neutrality | High-efficiency drivers, dynamic expression, “Focus Time” alignment |
| Cabinet Material | Plywood/MDF Reverse Wrap, Aluminum Matrix/Top Plate 11 | Proprietary composites “X-Material” & “S-Material” 40 | Machined aluminum panels 45 | High-density MDF “Gamma Structure” 48 |
| Tweeter | 1” Diamond dome | 1” Textile dome 41 | 1.1” Diamond-coated beryllium dome 45 | 1.1” Beryllium inverted dome 47 |
| Midrange | 6” Continuum cone | 7” Paper/cellulose composite 41 | 5” Graphene/carbon fiber sandwich 45 | 6.5” ‘W’ sandwich cone 47 |
| Woofer | 2 x 10” Aerofoil cone | 2 x 8” Paper cone 40 | 2 x 9” Graphene Nanotech 45 | 1 x 11” ‘W’ sandwich cone 47 |
| Bass Reflex Method | Vented (downward flow port) | Vented (rear port) 40 | Sealed (acoustic suspension) 51 | Vented (laminar port) 47 |
| Sensitivity | 90dB | Approx. 91dB 40 | 88dB 45 | 92dB 47 |
| Minimum Impedance | 3.0Ω (EPDR approx. 1.24Ω) | Approx. 2.48Ω 40 | 4Ω (nominal) 45 | 3.2Ω 47 |
| Weight (1 unit) | 100.6 kg 6 | Approx. 107 kg 52 | 101 kg 53 | 85 kg 48 |
Evaluation
| Evaluation Axis | Rating (5-point scale) | Commentary |
|---|---|---|
| Technical Performance | ★★★★★ | Packed with industry-leading innovations like Biomimetic Suspension and the ultimate Matrix structure. Measurements show extremely low distortion, representing the pinnacle of engineering 11. |
| Musical Appeal | ★★★★★ | While possessing analytical capability, its essence is deeply musical and emotionally appealing. It draws out the artistry at the heart of recordings and captivates listeners 10. |
| Build Quality | ★★★★★ | Flawless finish, use of premium materials like Connolly leather, and weight exceeding 100kg demonstrate craftsmanship reaching the realm of artisanship 12. |
| Price-to-Value | ★★★★☆ | While the absolute price is very high, its performance is often compared with even more expensive competitors. High value as a flagship, but required amplifier investment must also be considered 18. |
| Future-Proofing / Repairability | ★★★★☆ | B&W offers a 5-year warranty, with established support given its long history. However, being a showcase of proprietary technology, out-of-warranty repairs may be costly 35. |
IX. Conclusion: An Immortal Icon
The 801 D4 is a triumph of science-driven holistic engineering. It is a speaker balancing immense power and delicacy, with its defining trait being the profound transparency that strips away all artifice to reveal the core of musical performance.
The 801 D4 unquestionably inherits and advances its iconic legacy. It is a true reference-level transducer fusing cutting-edge resolution with rich musicality.
However, this outstanding performance comes with demanding requirements. The ideal owner is not a casual listener but a dedicated audiophile who understands and willingly invests in the high-quality amplification and careful setup needed to fully unleash its potential. For such users, the Bowers & Wilkins 801 D4 is not merely a component but an arrival point—an “endgame” speaker that can be a lifelong companion, delivering literally “hair-raising” state-of-the-art listening experiences 6.
Recommended Users
- Recommended for: Audiophiles seeking ultimate transparency that faithfully reproduces every corner of a recording. Those with large listening rooms who willingly invest in top-class amplification to maximize the speaker’s potential 18.
- Not recommended for: Those listening in small-to-medium rooms, those with limited budgets, or those preferring warm, forgiving sound that tolerates recording flaws. This speaker mercilessly exposes source deficiencies 21.
Overall Rating: ★★★★★
References
1. Bowers & Wilkins 801 D4 Signature Loudspeaker - SoundStage! Ultra, https://www.soundstageultra.com/index.php/equipment-menu/1254-bowers-wilkins-801-d4-signature-loudspeaker 2. Blog - History of 800 Series - Bowers & Wilkins, https://www.bowerswilkins.com/en-us/blog/products/history-of-800-series.html 3. Bowers & Wilkins 801 D4 White (Pair) - Athens Pro Audio, https://www.athensproaudio.gr/en/Bowers-Wilkins-801-D4-White.html 4. Bowers & Wilkins 800 Signature Speaker Series Overview - Audio Advice, https://www.audioadvice.com/blogs/expert-advice/bowers-wilkins-800-signature-speaker-series-overview 5. 800 Series Diamond Speakers | Bowers & Wilkins, https://www.bowerswilkins.com/en-us/category/loudspeakers/800-series-diamond/ 6. 801 D4 - Tower speaker | Bowers & Wilkins - United States, https://www.bowerswilkins.com/en-us/product/loudspeakers/800-series-diamond/801-d4/150237.html 7. Bowers & Wilkins New 801 & 805 D4 Signature Speakers Demo Audible Improvements!, https://www.audioholics.com/tower-speaker-reviews/bower-wilkins-801-d4-signature 8. Bowers & Wilkins 801 D4 - Tech Reviews, https://www.lbtechreviews.com/test/speakers/bowers-wilkins-801-d4 9. SoundStageGlobal.com - Bowers & Wilkins 801 and 805 D4 Signature - June 2023, https://www.soundstageglobal.com/index.php/product-debuts/bowers-wilkins-801-and-805-d4-signature-june-2023 10. Bowers & Wilkins 801 D4 Loudspeaker - The Absolute Sound, https://www.theabsolutesound.com/articles/bowers-wilkins-801-d4-loudspeaker/ 11. Bowers and Wilkins 800 D4 Diamond Series Speakers Review …, https://www.audioadvice.com/blogs/expert-advice/bowers-wilkins-800-d4-diamond-series-review 12. B&W 801 D4 Loudspeaker - Hi-Fi News, https://www.hifinews.com/content/bw-801-d4-loudspeaker 13. Bowers & Wilkins 801 D4 Signature Loudspeaker Review | StereoNET International, https://stereonet.com/reviews/bowers-wilkins-801-d4-signature-loudspeaker-review 14. Bowers & Wilkins 801 D4 800 Diamond Series Floorstanding Speaker (Pair) - Safe and Sound HQ, https://www.safeandsoundhq.com/products/bowers-wilkins-801-d4-800-diamond-series-floorstanding-speaker-pair 15. Discover the story behind the 800 Series Diamond plinth - YouTube, https://www.youtube.com/watch?v=mKPw02XoIH4 16. 801 D4 Signature - Tower speaker | Bowers & Wilkins - United States, https://www.bowerswilkins.com/en-us/product/loudspeakers/800-series-signature/801-d4-signature/300678.html 17. Bowers & Wilkins 801 D4 Loudspeakers - SoundStageAustralia.com, https://soundstageaustralia.com/index.php/reviews/589-bowers-wilkins-801-d4-loudspeakers 18. Bowers & Wilkins 801 D4 Signature loudspeaker Page 2 …, https://www.stereophile.com/content/bowers-wilkins-801-d4-signature-loudspeaker-page-2 19. SoundStageHiFi.com - Recommended Reference Component: Bowers & Wilkins 801 D4 Signature Loudspeaker - SoundStage! Hi-Fi, https://www.soundstagehifi.com/index.php/reference-components/1940-recommended-reference-component-bowers-wilkins-801-d4-signature-loudspeaker 20. 801 D4 Information Sheet - outlined fonts.indd - Bowers & Wilkins, https://www.bowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw7c4ee6fc/downloads/801d4-information-sheet.pdf 21. B&W 801D4 review | AudioShark Forums - High End Audio, Stereo and Home Theater Systems Discussions, https://www.audioshark.org/threads/b-w-801d4-review.20888/ 22. New B&W 801 D4 Speaker—Did Bowers & Wilkins Beat the 800 D3? - SoundStage! Australia Lead-In (Ep:2) - YouTube, https://www.youtube.com/watch?v=ZW7j1GxYZoc 23. B&W 801 D4 Loudspeaker Review - Audiophilepure, https://audiophilepure.com/2022/01/05/bw-801-d4-loudspeaker-review/ 24. Bowers & Wilkins 801 D4 Signature: Reviews, Competitors, Used Pricing - ExtremeHiFi, https://www.extremehifi.com/product/bowers—wilkins-801-d4-signature-00t6 25. Bowers & Wilkins 801 D4 - Sound Advice Review, https://www.sound-advice.online/product-reviews/bowers-wilkins-801-d4 26. Bowers & Wilkins 801 D4 Signature loudspeaker Measurements …, https://www.stereophile.com/content/bowers-wilkins-801-d4-signature-loudspeaker-measurements 27. Blog - The Story of Signature - Bowers & Wilkins, https://www.bowerswilkins.com/en-us/blog/sound-lab/story-of-signature.html 28. Bowers & Wilkins 801 D4 Signature loudspeaker - Stereophile.com, https://www.stereophile.com/content/bowers-wilkins-801-d4-signature-loudspeaker 29. Bowers & Wilkins’ flagship 800 Diamond speakers get the Signature treatment - What Hi-Fi?, https://www.whathifi.com/news/bowers-and-wilkins-flagship-800-diamond-speakers-get-the-signature-treatment 30. B&W 801 D4 Signature Loudspeaker - Hi-Fi News, https://www.hifinews.com/content/bw-801-d4-signature-loudspeaker 31. 801 D4 Signature - Custom Theatre 800 Series Signature floor-standing speakers | Bowers & Wilkins, https://www.bowerswilkins.com/en/product/loudspeakers/800-series-signature/801-d4-signature/300678.html 32. B&W/スピーカー/801 D4 ペアのご紹介です。 - OTAIRECORD, https://www.otaiweb.com/audio/shop-item-fida4784.html 33. B&W 801D4 Signature - Audio Pro Shop Kusakabe, https://kusakabe.co.jp/bw%E3%80%80801d4-signature/ 34. B&W 801 D4 Loudspeaker Lab Report | Hi-Fi News, https://www.hifinews.com/content/bw-801-d4-loudspeaker-lab-report 35. Warranty - Bowers & Wilkins, https://www.bowerswilkins.com/en-us/warranty.html 36. Product Support - Bowers & Wilkins, https://www.bowerswilkins.com/en-us/support/product-support.html 37. Support, Troubleshooting & More - Bowers & Wilkins, https://www.bowerswilkins.com/en-us/support/support-by-product.html 38. B&W Repairs - The Speaker Exchange, https://reconingspeakers.com/bampw-repairs/ 39. Service, Repair & Parts for your Bowers & Wilkins Nautilus 800 Diamond Floorstanding Speakers - Acme Revival, https://acmerevival.com/service-repair/bowers-wilkins-nautilus-800-diamond-floorstanding-speakers-1737568392/ 40. Wilson Audio’s Sasha DAW Speaker: A New WATT/Puppy Descendant - Audioholics, https://www.audioholics.com/tower-speaker-reviews/sasha-daw 41. Wilson Audio Specialties Sasha DAW loudspeaker - Stereophile.com, https://www.stereophile.com/content/wilson-audio-specialties-sasha-daw-loudspeaker 42. Magico s3 mk 2 or Sasha 2 or Focal Sopra 2 | AudioShark Forums, https://www.audioshark.org/threads/magico-s3-mk-2-or-sasha-2-or-focal-sopra-2.8933/ 43. Any Wilson owners out there? What model and how long have you been using them? Impressions : r/audiophile - Reddit, https://www.reddit.com/r/audiophile/comments/1kjd14v/any_wilson_owners_out_there_what_model_and_how/ 44. Magico S3 MK3 – Racer Blue High Gloss – M & S - Mono & Stereo, https://www.monoandstereo.com/magico-s3-mk3-racer-blue-high-gloss/ 45. S3 - Magico Loudspeakers, https://www.magicoaudio.com/s-series-s3 46. Magico S3 (2023) Listening Impressions | Page 2 | AudioShark Forums, https://www.audioshark.org/threads/magico-s3-2023-listening-impressions.21631/page-2 47. Scala Utopia Evo Black Lacquer - Focal Naim America, https://focalnaimamerica.com/product/view/1073 48. Scala Utopia Evo - 3-way floor-standing speaker - Focal, https://www.focal.com/products/scala-utopia-evo 49. Maestro Utopia Evo - 3-way floor-standing speaker - Focal, https://www.focal.com/products/maestro-utopia-evo 50. SCALA UTOPIA EVO - Focal, https://media.focal-naim.com/dam/scala-utopia-evo/fp_scala_utopia_evo_en.pdf 51. Magico S3 2023 Loudspeaker - The Absolute Sound, https://www.theabsolutesound.com/articles/magico-s3-2023-loudspeaker/ 52. Wilson Audio Sasha DAW - Absolute Sounds, https://www.absolutesounds.com/pdf/main/press/HFC_June19_WA_SashaDaw.pdf 53. Magico S3 - devAAudio, https://www.devaaudio.com/product-page/magico-s3 54. Bowers & Wilkins 801 D4 Floor Standing Speaker - WattHiFi, https://watthifi.com/products/bowers-wilkins-801-d4 55. The Bowers & Wilkins 801 D4 Loudspeakers - Stereophile.com, https://www.stereophile.com/content/bowers-wilkins-801-d4-loudspeakers