ESB 3000 Series
Research at the highest level
The ESB 3000 speaker system was developed and assembled with a great commitment to the research of materials and engineering solutions of the highest level.
The baskets have been engineered in order to obtain the maximum in terms of torsional rigidity (bending). Pressed paper with waterproof treatment is the best marriage of lightness, stiffness, and the ability of the cone to dampen any unwanted vibration. All the woofers are equipped with a motor with a grade Y-35 Ferrite magnet, with significantly higher performance than the classic "standard" ones.
The tweeters use a silk-impregnated thin fabric dome diaphragm for a smooth sound, and oversized voice coils, ventilated and damped with iron-fluid oil.
They are supplied with accessories for flexible installation.
Treated paper cones:
It is widely recognized that cones made of paper are the best marriage of lightness, stiffness, and the ability of the cone to dampen any unwanted vibration (read: distortion). The paper cone, widely known for its excellent sound attributes, is waterproof, thanks to a polymer developed exclusively by ESB. The treatment does not change the appearance and parameters of the speaker like the shiny polymers that add an appreciable amount of mass to the cone itself and significantly modify the sonic result.
The treatment protects the cone from water dripping (like inside a door panel), as well as accidental splashes on the front of the cone.
Basket and ventilation system:
The ABS basket, reinforced with fiberglass, has been engineered in order to obtain the maximum in terms of torsional rigidity (bending), but at the same time offer the 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. A factor of no secondary importance is the damping of this component, often metal baskets tend to resonate, and this significantly alters the final sound result of the speaker. The material used, in addition to not being as 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.
High Damping Single Wave Perbunan Rubber. The Perbunan rubber edge is much more stable when the temperature changes than the classic rubber, its range of use goes from -20 ° to + 100 ° while maintaining its elasticity performance almost constant. Its profile ensures a dual function of high damping and great transversal stability, this means that the cone is "forced" only to the vertical movement, eliminating the transversal movements that could cause contact with the coil and the magnet, this means that these speakers can operate safely at high power and high excursions.
ESB's research department has spent a lot of time researching the ideal shape of this fundamental component (spider) which must guarantee the perfect and linear travel of the cone at both low and high power but must limit its excursion before it can get out of control. The material used is special balanced cotton impregnated with phenolic resin that ensures a perfectly symmetrical excursion already from the first mW of power, and then attenuates it when it reaches the value of Xmax. The design of this component ensures perfect ventilation of the voice coil, evacuating the heat from the lower part of the speaker, and at the same time avoids any counter-pressure given by the movement of the cone.
The Magnetic Motor:
The voice coil of the woofers uses aluminum support and a winding with a double layer technology of copper wire with an aluminum core. The long-stroke design was chosen to improve sensitivity and efficiency while keeping distortion to a minimum. All these speakers are equipped with a motor with a grade Y-35 Ferrite magnet, a type of magnet with significantly higher performance than the classic "standard" ones. The metal parts of the engine use low carbon steel and have been designed to obtain the maximum magnetic saturation, this guarantees the best electroacoustic parameters.