Bowers & Wilkins 804 D4 Ex-Demonstration White

These are ex-demonstration Bowers & Wilkins 804 D4 floorstanding speakers in White, available now at a significant saving on the original retail price. The pair is in good condition and is sold complete with all original accessories and packaging — everything that shipped from the factory is included. Shipping costs are not included in the listed price; please contact us directly to discuss delivery options. We are also happy to talk through any trade-in opportunities you may have.

The 804 D4: Where the 800 Series Diamond Meets Real-World Listening

The Bowers & Wilkins 804 D4 sits within the flagship 800 Series Diamond range — a line that represents Bowers & Wilkins' most rigorous engineering work. The 804 D4 is a full floorstanding loudspeaker, bringing the core technologies of the 800 Series Diamond into a form that works in a wider range of rooms and systems than the larger models above it in the range.

Diamond Dome Tweeter

The 804 D4 uses Bowers & Wilkins' diamond dome tweeter — the same technology found at the very top of the 800 Series range. Diamond is the hardest known material and produces a dome that is effectively rigid across the entire audible frequency range and well beyond it, eliminating the breakup modes that affect softer dome materials. The result is treble reproduction of exceptional precision and control, with no colouration introduced by the tweeter itself.

Continuum Cone Midrange

The midrange driver uses Bowers & Wilkins' Continuum cone — a woven material developed specifically for the 800 Series Diamond. Continuum replaced the Kevlar cone used in previous generations and was designed to suppress the particular coloration that woven cone materials can introduce. It operates within a dedicated midrange enclosure, isolating it from the bass drivers and allowing it to work without interference.

Biomimetic Suspension

The 804 D4 introduces Biomimetic Suspension to the bass and midrange drivers — a spider assembly whose open lattice structure is derived from natural forms. It reduces air turbulence within the driver assembly, lowering distortion and improving the clarity of low-level detail that lesser designs obscure.

Solid Body Tweeter-on-Top

The tweeter module sits above the main cabinet on a decoupled mount, removing it from the enclosure entirely. This arrangement eliminates cabinet-borne vibration reaching the tweeter and ensures that the high-frequency reproduction is free from the resonances that a conventional flush-mounted tweeter would be subject to.

Technical Specifications

Who Is This For?

This listing is for the buyer who wants genuine 800 Series Diamond performance — diamond dome tweeter, Continuum cone midrange, Biomimetic Suspension — at a price that reflects ex-demonstration status rather than new retail. If you have been considering the 804 D4 and the new price has given you pause, this is the opportunity. The White finish is relatively uncommon and suits rooms where a speaker that does not disappear visually is an asset rather than a compromise.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. Martins Hi-Fi is the second oldest Bowers & Wilkins dealer in the world — our relationship with the brand is long, deep, and built on genuine conviction in what they make. Tim or Dave will be happy to discuss this pair with you, talk through amplifier matching, and advise on whether these speakers are right for your room.

Shipping is not included in the listed price — please contact us before purchasing to confirm costs to your location. We are delighted to discuss trade-in opportunities and can advise on part-exchange against this or any other product we stock.

Contact us at [email protected], call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.

You may also wish to explore the Bowers & Wilkins DB1D subwoofer to extend the low-frequency reach of your system, or consider the Bowers & Wilkins DB4S as a more compact subwoofer option. For the ultimate statement in the B&W range, the Bowers & Wilkins Nautilus represents the pinnacle of what the brand produces.