The DFS membrane

For very high-definition sound, control of the magnetic flux circulating in the loudspeaker is essential. Our acousticians have created a magnetic circuit of incredible stability, guaranteeing perfectly controlled sound: Neutral Inductance Circuit (NIC) technology. This patented technology resides in a Faraday ring whose dimensions, material and positioning are optimized to make the magnetic flux stable and the sound highly precise.

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.

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.