Bowers & Wilkins 803 D4 Speakers

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Our most compact headed model brings all the technical advantages of a dedicated midrange enclosure – the Turbine™ Head, with its decoupled midrange cone – to a smaller footprint that’s easily accommodated in any home.

Instead of a conventional loudspeaker box, our cabinets are 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.

Matrix bracing uses interlocking panels to reinforce loudspeaker cabinet walls in all directions internally, reducing resonance and creating a more believable soundstage. The Matrix assembly in 803 D4 is our best yet, ensuring optimum scale, power and intelligibility.

803 D4 mounts two Aerofoil™ bass cones in twin solid aluminum bass pods, each of which is clamped into an aluminum plate fixed to the stiffest part of its curved cabinet. Formed as single pieces of metal, these stiff structures provide the perfect mechanical location for those powerful bass cones.

Innovation is at the heart of everything we do. We question, we examine, we understand and then we evolve. We use computer modelling to explore and reimagine every aspect of loudspeaker design. Learn more about all the technologies that combine to make 800 Series Diamond so special here.

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  • Specifications

    Size & weight
    Height: 1165mm (45.9 in)
    Width: 357mm (14.1 in)
    Depth: 511mm (20.1 in)
    Net weight
    62.15kg (137 lb)
    Technical details
    Technical features
    Diamond tweeter
    Solid body Tweeter-on-Top
    Continuum™ cone FST
    Anti-Resonance plug
    Biomimetic Suspension
    Turbine™ Head
    Aerofoil™ cone bass units
    3-way vented-box system
    Drive units
    1x ø25mm (1in) Diamond dome high-frequency
    1x ø130mm (5in) Continuum cone FST midrange
    2x ø180mm (7in) Aerofoil cone bass units
    Frequency range
    16Hz to 35kHz
    Frequency response
    19Hz to 28kHz (+/-3dB from reference axis)
    90dB (on axis at 2.83Vrms at 1m)
    Harmonic distortion
    2nd and 3rd harmonics (90dB,1m on axis)
    <1% 80Hz – 20kHz
    <0.3% 100Hz – 20kHz
    Nominal impedance
    8Ω (minimum 3.0Ω)
    Recommended amplifier power
    50W – 500W into 8Ω on unclipped programme
    Max recommended cable impedance