The brand's signature inverted dome tweeter has been constantly evolving since its inception. Its main advantage, apart from its very low directionality, lies in the use of a small-diameter (and therefore very light) coil coupled directly to the rigid dome.
As with the bass and midrange driver diaphragms, Focal's specificity lies in working directly on sound emission, and therefore on the mechanical characteristics of the materials. With the introduction of the pure Beryllium inverted dome tweeter some ten years ago, Focal demonstrated the decisive advantage of this exclusive technology.
PORON SURROUND FOR SILKY TREBLE
For the TNF tweeter, Focal has made two major changes to the aluminum/magnesium tweeter. The surround that connects the dome to its support uses Poron, a shape-memory material. This surround is directly derived from the famous Utopia Beryllium tweeter, and reduces distortion by a factor of three between 2000 Hz and 3000 Hz, where the ear is most sensitive.
OPTIMIZED SPATIALIZATION
In order to perfect spatialization and further improve the inverted dome's very low directionality, far superior to that of the competition's conventional positive dome, a waveguide has been developed. In the horizontal plane, the frequency response is within +/- 0.5 dB. This performance guarantees an incredibly stable soundstage, less critical of the ideal listening position.
Achieving such precision on a component as delicate as a tweeter has only been possible thanks to more than twenty years' hard work to improve our industrial processes. Controlling production is the only way to continue innovating in the loudspeaker field...
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REMOTE AMPLIFIER IN CURRENT MODE
The most transparent and natural
Since main monitors are frequently soffit-mounted, these require external electronics for this application. Focal engineers have therefore developed an amplification system combining a class H with a current mode. By controlling the current (instead of the voltage), it is possible to directly control the force submitted to the membrane and eliminate any unwanted artefacts. Combined with analogue filtering and exceptional drivers, this amplification achieves the lowest THD ever measured in an anechoic chamber.
"M" profile Béryllium Tweeter
Rigidity and Purity
Patented by Focal, the pure beryllium ‘M’ profile tweeter combines rigidity, lightness and damping for exceptional high-frequency reproduction. The ‘M’ membrane is the result of many years of research and expertise. Made in a single piece, it improves sound dispersion, reduces distortion and ensures optimum power handling.
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.
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