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. For us, the 800 Series Diamond is everything we know, and everything we are.

For listeners who prefer a more conventional aesthetic but crave the performance of an 800 Series Diamond loudspeaker, the 804 D4 is the perfect choice. lts new reverse-wrap cabinet follows the proven design principles established by its larger siblings.

When it came to designing the ideal shape for the 800 Series Diamond cabinet, we did a U-turn. Quite literally. Our cabinets are formed from one continuous curve, backed by a spine of solid aluminium, so sound dispersion is improved and cabinet reflection is reduced.

A great speaker needs a rock-solid foundation. The new 804 D4 uses a downwards-firing Flowport™ exiting on to a solid aluminium plinth complete with a steel constrained layer damping sheet, which controls unwanted resonance. lt also has greatly upgraded spikes for maximum stability.

• Description: 3-way vented-box system
• Drive units: 1x ø 25 mm (1") diamond dome high-frequency, 1x ø 130 mm (5") Continuum cone FST™ midrange, 2x ø 165 mm (6.5") Aerofoil cone bass units
• Frequency range: 20 Hz to 35 kHz
• Frequency response (±3 dB from reference axis): 24 Hz to 28 kHz
• Sensitivity (on axis at 2.83 Vrms at 1 m): 89 dB
• Harmonic distortion: 2nd and 3rd harmonics (90 dB, 1 m on axis), <1% 90 Hz - 20 kHz, <0.3% 120 Hz - 20 kHz
• Nominal impedance: 8 Ω (minimum 3.0 Ω)
• Recommended amplifier power: 50 W – 200 W into 8 Ω on unclipped programme
• Max. recommended cable impedance: 0.1 Ω