ESB 9.100 4”/100 mm High-End Cone Midrange

• CDT system to regulate and control the airflow generated by the movement of the cone, helps the cooling of the voice coil and controls the damping of the cone.

• Faraday cylinder: this copper cylinder drastically reduces the inductance of the voice coil, in this way the passband of the midrange can be extended to extremely high frequencies.

• Entirely numerically controlled low carbon steel pole yoke. The whole motor group has been designed with the help of FEM software in order to concentrate all the magnetic flux in the working point: in front of the voice coil. Its enormous mass guarantees excellent temperature dissipation.• Oversized neodymium magnet with high resistance to high temperatures. The total magnetic force is very high compared to similar products• Pole plate obtained with a numerically controlled machine and not by stamping, this drastically reduces construction tolerances to the advantage of performance. A series of channels conveys the cooling air to increase the performance of the woofer and its longevity.• Aluminum alloy basket with very open design to eliminate back pressure under the cone.• Large diameter super light aluminum voice coil. It uses a high-strength aluminum alloy so as to be able to reduce its thickness and therefore its weight. The winding is also aluminum with the "skin" in pure copper.• Conex spider, balanced to obtain the same compliance in both movements: upper and lower, this guarantees very low distortion.• High modulus carbon fiber cone molded with M+F system which guarantees perfect geometry and perfect adhesion of the carbon fibers to each other, obtaining a product of extreme rigidity, with a very high sound transmission capacity but also excellent internal damping, all for a very low weight and constant performance as it is insensitive to changes in humidity and temperature.• Butyl rubber rim designed to obtain an exponential resistance progression in order to control the cone at large displacements but at the same time not affect the movements at very low volume.• Carbon fiber dust cap like the cone, the function of this part is fundamental on a woofer with a voice coil of this size, its shape and rigidity are the perfect combination of lightness and rigidity to ensure a deep, fast and dynamic bass.