Kevlar: Bowers and Wilkins’ cone material of choice since 1974 and with good reason

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We say .. a fascinating, informative and interesting hype-free short video by Dr. Peter Fryer: Director of Research.

They say: The midrange is where the real musical action is invariably found, and a smooth midband is an invaluable loudspeaker quality. Enter Kevlar®. It’s been Bowers & Wilkins’s cone material of choice since 1974, and with good reason. The basic woven fabric is first impregnated with a stiffening resin that cures during the cone forming process. The cone is then further treated with a polymer coat, which seals the fibres and adds damping. The result is a semi-flexible cone, which exhibits a peculiar style of break-up behaviour, not found in more conventional materials, that maintains a more constant dispersion pattern at all frequencies in its range and transmits far fewer delayed, time-smearing sounds to the listener.

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  • Tel Butcher

    Great video – of course, there are also issues with Kevlar otherwise everybody else would be using it… it is prone to ‘ringing’ in the upper-presence region – a defect which can become very fatiguing.
    An ideal material for flack jackets, Kevlar has fibers bonded together, so they act like steel. This leads to sound being converted to heat and therefore lost.