THE ARAMID FIBRE SANDWICH MEMBRANE
The aramid fibre sandwich membrane, recognizable by its yellow color, is the symbol of the Car Audio K2 Power line.
AN HISTORIC MEMBRANE
Also used on JMLab high-fidelity loudspeakers, the K2 sandwich membrane was first launched in 1986 with the use of Polykevlar. The Poly-K membrane consists of two sheets of aramid fibre on either side of a hollow microbead structure to improve the weight/stiffness/damping compromise. The yellow aramid fibre membrane has acquired iconic status ever since. It has recently been extensively renewed, while retaining the characteristics that made it such a success.
A MEMBRANE AT THE HEART OF PERFORMANCE
In 2016, the aramid fibre sandwich membrane evolved but retained its identity, always combining these 3 key factors: rigidity / lightness / damping. Its aim is to offer high-quality acoustic reproduction, whatever the type of music listened to.
It now features an ultra-light foam core sandwiched between a layer of aramid fibre and a layer of glass fibre. This ensures high purity and precision, all without coloration.
Focal products using this technology
Discover other Focal technologies
Gamma Structure
An anti-vibration cabinet
As the surface area of a loudspeaker cabinet is greater than that of the loudspeaker diaphragms, it can radiate sounds that are distorted by the resonances of the cabinet structure. This alters reproduction and blurs the sound image. To prevent such "interference", it is essential that the cabinet is as inert as possible, that it is not emissive. At Focal, we use MDF (Medium Density Fiber) to achieve this inertia. This stable, heavy structure is anti-vibration. It has been optimized by vibratory mapping of the loudspeaker walls to reinforce or modify the structure wherever a weak point appeared.
Infinite Horn Loading
High-definition sound
For the Beryllium tweeter to deliver all its finesse, it would need an almost infinite volume. Sopra's need for compactness meant that the maximum volume of the cabinet had to be used for the bass. Exploring new ways of loading the tweeter led us to imagine the IHL infinite-load horn. The IHL (Infinite Horn Loading) system enables the Beryllium tweeter to be loaded while respecting the compactness of the loudspeaker. The rear wave is gently and progressively absorbed to avoid distortion. The result is maximum definition.
Tweeter Frak
Perfect treble
For perfectly reproduced high frequencies, Focal engineers research and develop specific tweeter cones. Shapes and materials play an essential role in reproduction. For the FRAK tweeter cone, they chose aluminum/magnesium, combined with an M-shaped profile. This revolutionary combination in Car Audio offers a beautiful descent in frequency and superb damping. The lightness of the cone allows the tweeters in particular to shine in the treble extremes.
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