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.

Our most compact headed model brings all of the technical advantages of a dedicated midrange enclosure to a smaller footprint that's easily accommodated in any home. Small doesn't mean compromised, either: 803 D4 still bristles with technical innovation throughout.

Our all-new Biomimetic Suspension revolutionises 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.

803 D4 mounts two Aerofoil bass cones in aluminium bass pods, each of which is clamped into an internal aluminium plate fixed to the stiffest part of its cabinet. Formed as single pieces of metal, these structures provide the perfect location for clean, accurate bass.

• 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 180 mm (7") Aerofoil cone bass units
• Frequency range: 16 Hz to 35 kHz
• Frequency response (±3 dB from reference axis): 19 Hz to 28 kHz
• Sensitivity (on axis at 2.83 Vrms at 1 m): 90 dB
• Harmonic distortion: 2nd and 3rd harmonics (90 dB, 1 m on axis), <1% 80 Hz - 20 kHz, <0.3% 100 Hz - 20 kHz
• Nominal impedance: 8 Ω (minimum 3.0 Ω)
• Recommended amplifier power: 50 W - 500 W into 8 Ω on unclipped programme
• Max. recommended cable impedance: 0.1 Ω