The 805 D4 standmount loudspeaker is the most compact model in the 800 Series Diamond range, but it’s still packed with advanced technologies, including that all-important Diamond dome tweeter and Solid Body Tweeter-on-Top. It’s proof positive that small can still be beautiful.
Floor stands sold separately.
Little Diamond
805 D4 might be smaller than its floorstanding siblings, but it’s no lightweight: its beautifully constructed Reverse-Wrap cabinet, stiff aluminium bass pods and 165mm (6.5in) Continuum™ mid-bass cone afford it exceptional bass extension and scale for a relatively compact speaker.
800 Series Diamond
This is not just another speaker range. Each new generation of 800 Series Diamond is a landmark event for Bowers & Wilkins. This is our benchmark, our icon; the most advanced range of loudspeakers we know how to make, equipped with all of our most sophisticated technologies and designed to deliver the upmost in sonic realism. For us, the 800 Series Diamond is everything we know, and everything we are.

Diamond Dome Tweeter
One of our most significant accomplishments over the past two decades, the ultra-stiff, supremely accurate Diamond dome tweeter is the perfect combination of low mass, exceptional stiffness and outstanding accuracy. 15 years after we introduced it, we haven’t found a better tweeter dome technology.
Solid Body Tweeter Assembly
The latest incarnation of our iconic Solid Body Tweeter-on-Top housing features an elongated form with a longer tube-loading system, producing an even more free and open sound with high frequencies. As before, the carefully decoupled housing is milled from a single solid block of aluminium to better resist resonance.
Reverse Wrap Cabinet
Instead of a flat-fronted speaker with a curving back, our cabinets are formed from one continuous curve, held together with a spine of solid aluminium. Fewer joins make for a stiffer, more inert structure, and a curved front means less baffling around the drive units. So sound dispersion is improved, and cabinet reflection is reduced.
Matrix
Matrix bracing uses interlocking panels to reinforce loudspeaker cabinet walls in all directions internally, reducing resonance and creating a more believable soundstage. Every model in the new 800 Series Diamond benefits from an upgraded Matrix design that combines solid plywood construction with aluminium bracing to reinforce key stress points.
Continuum cone
Thanks to its composite construction, the Continuum cone avoids the abrupt transitions in behaviour that can impair the performance of a conventional drive unit. The result is a more open, neutral performance that delivers voices and instruments with precision and transparency.
Aluminium top-plate
Every stereo model in the new 800 Series Diamond range has a significantly upgraded cabinet design with an all-new aluminium top section for even greater stiffness. The same design also provides a perfect mounting point for all-new Leather by Connolly cabinet detailing, with luxurious black leather for dark cabinets and light grey for lighter finishes.
All stereo models in the new 800 Series Diamond range now use rear-mounted crossover designs mounted on stiff aluminium spines. This isolates the sensitive capacitors from the unwanted effects of air pressure within the enclosure and makes for a very effective heatsink to ensure optimum performance when in use.
The top section of every stereo model features an aluminium top-plate, covered in all-new Leather by Connolly trim. We use luxurious, full-grain black leather for Gloss Black and Satin Rosenut finishes, and a light grey leather for White and Satin Walnut.
Why step up from 805 D4 to 804 D4? First, 804 D4 is a three-way speaker, with twin 165mm (6.5in) Aerofoil™ bass cones – and that has huge benefits to its power and scale. Second, as a three-way speaker, it includes a dedicated midrange cone, so voices and other details will sound more accurate.
Description
2-way vented-box system
1x ø25mm (1in) diamond dome high-frequency
1x ø165mm (6.5in) Continuum cone bass midrange
Technical Features
Diamond tweeter
Solid body Tweeter-on-Top
Continuum cone bass/mid
Matrix
Flowport
Frequency range
34Hz to 35kHz
Frequency response (+/-3dB from reference axis)
42Hz to 28kHz
Sensitivity (on axis at 2.83Vrms at 1m)
88dB
Harmonic distortion
2nd and 3rd harmonics (90dB,1m on axis)
<1% 90Hz – 20kHz
<0.3% 120Hz – 20kHz
Nominal impedance
8Ω (minimum 4.6Ω)
Recommended amplifier power
50W – 120W into 8Ω on unclipped programme
Max. recommended cable impedance
0.1Ω
Dimensions
Height: 440 mm
Width: 240 mm
Depth: 373 mm
Net weight
15.55kg
Finishes
Gloss Black cabinet with Black grille
Satin Rosenut cabinet with Black grille
Satin Walnut cabinet with grey grille
White cabinet with grey grille