804 D4 For listeners who crave the performance of an 800 Series Diamond™ tower speaker but prefer a more conventional aesthetic, the 804 D4 is the perfect choice. Its new cabinet and plinth make it B&w’s best-performing 804 yet. Classic quality 804 D4 is perhaps more conventional in appearance than other tower speakers in the 800 Series Diamond range, but it’s every bit as sophisticated. Its new Reverse-Wrap cabinet is both a mechanical and acoustic revolution in its class, and its new plinth ensures rock-solid, accurate bass response too. Aluminum top-plate Every stereo model in the new 800 Series Diamond range has a significantly upgraded cabinet with an all-new aluminum top-plate. This also provides a perfect mounting point for all-new Leather by Connolly trim, with luxurious black leather for dark cabinets and light grey for lighter finishes. Reverse Wrap cabinet Instead of a conventional loudspeaker box, the cabinet in 804 D4 is made from a continuous curved section of wood, with the drive units mounted at the heart of the curvature. This stiffer, more inert structure resists mechanical resonances far better and also ensures better dispersion of sound. Aluminum plinth A great speaker needs a rock-solid foundation. The new 804 D4 uses a downwards-firing Flowport exiting on to a solid aluminum plinth complete with a steel constrained layer damping sheet, which controls unwanted resonance. It also has greatly upgraded spikes for maximum stability and durability. The science of sound Innovation is at the heart of everything B&w do. They question, examine, understand and then evolve. Bowers & Wilkins use computer modelling to explore and reimagine every aspect of loudspeaker design. Get a Head 804 D4 is the entry-level tower speaker model in the 800 Series Diamond range. Step up to 803 D4 and you’ll find larger bass drivers (180mm, 7-in) plus, crucially, the addition of a Turbine™ Head enclosure for the 130mm (5-in) midrange cone, which adds even more spaciousness to the sound. SPECIFICATIONS Dimensions Height: 1071mm (42.2 in) Width: 306mm (12 in) Depth: 391mm (15.4 in) Net weight 36.85kg (81.2 lb) Technical features Diamond tweeter Solid body Tweeter-on-Top Continuum™ cone FST Anti-Resonance plug Biomimetic Suspension Matrix™ Aerofoil™ cone bass units Flowport Description 3-way vented-box system Drive units 1x ø25mm (1in) Diamond dome high-frequency 1x ø130mm (5in) Continuum cone FST midrange 2x ø165mm (6.5in) Aerofoil cone bass units Frequency range 20Hz to 35kHz Frequency response 24Hz to 28kHz (+/-3dB from reference axis) Sensitivity 89dB (on axis at 2.83Vrms at 1m) Harmonic distortion 2nd and 3rd harmonics (90dB,1m on axis) <1% 90Hz – 20kHz <0.3% 120Hz – 20kHz Nominal impedance 8Ω (minimum 3.0Ω) Recommended amplifier power 50W – 200W into 8Ω on unclipped programme Max recommended cable impedance 0.1Ω Cabinet finishes Gloss Black White Satin Resent Satin Walnut Grille finishes Black Grey Black Grey