Treated Paper Cones

It is widely recognized that cones made of paper represent an ideal marriage between lightness, stiffness and the ability of the cone to dampen any unwanted vibration (read: distortion). Our paper cone, widely known for its excellent sound attributes, is made waterproof thanks to a polymer developed exclusively by ESB. The treatment does not negatively impact the appearance or performance of the speaker like the shiny polymers used by other companies which add an appreciable amount of mass to the cone and significantly modify its sound quality.
Our treatment protects the cone from dripping water (like inside a door panel), as well as accidental splashes on the front of the cone.

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Basket and Ventilation System

The basket, made from ABS and reinforced with fiberglass, has been engineered to obtain the maximum torsional rigidity (resistance to bending), but at the same time, offers minimum resistance to the passage of air displaced by the cone from the rear face. This is clearly visible from the numerous stiffeners and ribs. The basket plays a fundamental role in aligning the coil in the magnetic circuit; its rigidity is crucial. Of equal importance is the damping of this component. Often, metal baskets tend to resonate, and this significantly alters speaker’s sound quality. The material used, in addition to being less sensitive to thermal changes, is non-flammable and also non-resonant.
In addition, the ABS frame allows for a better clamping force torque than typical pressed steel frames and ensures that the voice coil remains well centered within the magnetic field