@koost_amojan
Yes the F cone is a fibrous fabric design. Excellent cone material. JM Lab are following well understood and proven design criteria while many manufacturers do not. Sandwich designs allow for shear mode damping if the internal material between the sandwich is soft - this works well.
https://www.focal.com/en/flax-sandwich-cone
The point I am making is about internal damping and the importance of "neutrality of the sound" as JM Labs puts it. Cones with high internal damping sound better to me as they reproduce timbre more accurately due to the lack of internal resonances to color the sound. I only mention pulp paper and fabric or doped fabric as two long proven examples that work and are highly damped internally. Flax is a fabric so I would include F Cones in my short list of better sounding transducers.
Of course you can use other materials to make a light internally damped diaphragm however Metal and Ceramic and plastic/polypropylene are popular but definitely poor choices for materials and the coloration that their ringing adds is very audible to my ears. Accuton had to add rubber dampers on their cones because the ringing was so bad!
Yes the F cone is a fibrous fabric design. Excellent cone material. JM Lab are following well understood and proven design criteria while many manufacturers do not. Sandwich designs allow for shear mode damping if the internal material between the sandwich is soft - this works well.
https://www.focal.com/en/flax-sandwich-cone
The point I am making is about internal damping and the importance of "neutrality of the sound" as JM Labs puts it. Cones with high internal damping sound better to me as they reproduce timbre more accurately due to the lack of internal resonances to color the sound. I only mention pulp paper and fabric or doped fabric as two long proven examples that work and are highly damped internally. Flax is a fabric so I would include F Cones in my short list of better sounding transducers.
Of course you can use other materials to make a light internally damped diaphragm however Metal and Ceramic and plastic/polypropylene are popular but definitely poor choices for materials and the coloration that their ringing adds is very audible to my ears. Accuton had to add rubber dampers on their cones because the ringing was so bad!