Read more about .Kompund CGF
Speaker cone engineering is looking for utopia target: light as the air, and infinitely rigid.
With very light and rigid cones cone break-up appears due to lake of damping.
In another hand, the cones using additional damping treatment are heavy, which limits the speaker efficiency, the upper band extension and transient response.
In order to keep the best of both worlds, we have developed a hybrid cone material made of Carbon and Glass fibers.
Our CGF cone is 10 more rigid than conventional Carbon cone, and its inner damping is 2 times more efficient.
The added mass is only +3% which is negligible considering the advantages provided.
On these sonogram, we compare the same 5" woofer using different cone material.
(Left: Ceramic | Right: Carbon)
(Left: Paper | Right: CGF)
Ceramic is fast, but most of the energy is focused around 10kHz
Carbone is a good choice, but the cone break-up located at 5.5kHz isn't convenient for crossover
Paper has very intense break-up at 5kHz, with lagging. It provides the typical sound coloration of paper cone
CGF has a much more homogeneous energy from 200Hz to 8kHz, without specific break-up.
For this comparison, all the parts of the speakers remains unchanged, only the cone is different.
We choose cones from the best cone vendors specialized in each technology