The 15ND840 is a high power, high output, extended low frequency neodymium transducer which meets the most stringent requirements in high quality professional transducers and represents the updated version of the 18sound flagship (15ND830) to which is a direct replacement with improved construction.
The high level of performance and sound quality have been achieved by exploiting the most advanced technologies available today. Thanks to its versatility, the 15ND840 can be used in 2-way compact reflex enclosures, in multiway systems and in compact sub woofers as small as 60 lt.
The neodymium magnet assembly assures high flux concentration, low power compression and excellent heat exchange. This results in high levels of force factor and power handling with an optimum power to weight ratio.
The deep profile curvilinear cone, created from a special high strength wood pulp, has been designed to achieve the best possible linearity within its frequency range. The cone surround, made is highly resistant to aging and fatigue. The in-house developed cone treatment is a humidity repellent and significantly dampens bell mode resonances. The 75mm (3in) copper edge-wound voice coil assembly is wound on a strong fiberglas former to improve force transmission and power handling. The already low distortion and sound quality are further improved by two demodulating rings (DDR) that flatten impedance and phase with a constant power transfer.