Excellence. Evolved.
This is not just another speaker range. Each new generation of 800 Series Diamond is a landmark event for Bowers & Wilkins. The benchmark, the icon; the most advanced range of loudspeakers B&W knows how to make.

B&W's largest centre channel speaker HTM81 D4 is designed to partner the 801 D4 and 802 D4. Small wonder, then, that it’s such a powerful and whole-hearted performer, with both bass power and midrange extension that perfectly matches the quality of its illustrious stablemates.

Midrange Enclosure
Inside HTM81 D4, B&W uses a stiff, aluminium enclosure designed to maximize the performance of the midrange drive unit. It provides a controlled location point for the midrange decoupling and prevents unwanted air leakage into the surrounding cabinet.

Solid Body Tweeter
The latest incarnation of B&W's 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, B&W 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.

Biomimetic Suspension
Now, B&W has turned their attention to another crucial element in a loudspeaker cone: the fabric spider. The all-new Biomimetic Suspension revolutionizes midrange cone performance by greatly reducing the unwanted air pressure and coloration that a conventional fabric spider can generate. The result? Midrange transparency you wouldn’t believe possible.

Diamond Dome Tweeter,br> Its unique stiffness-to-lightness ratio makes diamond the perfect tweeter material. B&W's diamond domes are capable of unrivaled acoustic detail, naturalism and spaciousness.

Continuum cone
Thanks to its composite construction, the Continuum cone avoids the abrupt transitions in behavior 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.

Aerofoil Bass Cone
B&W's Aerofoil bass cone technology remains an outstanding solution to the conundrum of combining low mass and high stiffness, thanks to its carbon-fibre skin and variable-profile foam core. Now, B&W has added the foam Anti-Resonance Plug for lower distortion and even cleaner bass.

Decoupled Midrange assembly
Every 800 Series Diamond loudspeaker aside from the stand-mount 805 D4 has a dedicated midrange cone using four key Bowers & Wilkins technologies: the Continuum cone, FST , Biomimetic Suspension and midrange decoupling, the latter ensuring minimal interference from the operation of the loudspeaker’s bass drivers.

Crossover
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.

Manual

Info Sheet