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Bowers & Wilkins 804 D4 Tower Speaker (Each)

  • Sale
  • $ 7,500

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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 our 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.
Technical features:
  • Diamond tweeter
  • Solid body Tweeter-on-Top 
  • Continuum™ cone FST 
  • Matrix™
  • Anti-Resonance plug 
  • Biomimetic Suspension 
  • Aerofoil™ cone bass units 
  • Flowport


  • 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)


  • 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

Net weight:

  • 36.85kg (81.2 lb)


  • Height: 1071mm (42.2 in)
  • Width: 306mm (12 in)
  • Depth: 391mm (15.4 in)

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to



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