The 15NLW9400 is an extended low frequency loudspeaker which sets a new industry standard in 15" (380mm) neodymium 4" voice coil high performance transducers. It has been designed for use as a low bass or sub-woofer component in either a more compact reflex, bandpass or horn loaded configuration. It provides clean, linear, undistorted low frequency reproduction at very high power levels. In its reflex configuration, it can be used in extremely compact enclosures, (65 - 150 lt). The low weight neo magnet assembly assures high flux concentration, low power compression and excellent heat exchange, resulting in high levels of force factor and power handling with an optimum power to weight ratio. The integrated heatsink has been studied using F.E.A. simulators and the necessary heat transfer to the dissipative structure has been improved, increasing power handling and lowering the power compression figures. The high excursion capabilities of the surround and suspension system, in conjunction with the Double Silicon Spider (DSS), enable the 15NLW9400 to achieve high levels of linear travel and maintain full control of the moving mass. The already low distortion and sound quality of this loudspeaker has been further improved by the Double Demodulation Rings (DDR), designed to dramatically reduce the intermodulation and harmonic distortion whilst improving the transient response. The design provides clean, undistorted LF reproduction even at very high SPL without damages. The 15NLW9400 features a dedicated carbon fibre reinforced straight ribbed cone, with a specific pulp formulation containing damping fibres. The membrane is treated in-house with a proprietary resin mix in order to increase the cone bend performances, up to 6 times better if compared with traditional celluloses pulp, twice than glass fibre added pulps. The results is a very linear piston action across the entire working range minimizing the breaking modes. The suspension system provides symmetric large signal behaviour throughout the whole working range, providing low harmonic distortion at different excitation levels. The state-of-the-art 100mm (4in) 4-layers Interleaved Sandwich Voice coil (ISV) provides high levels of thermal stability and durability. The weight of the windings are evenly distributed, providing a uniform motive drive. This, in conjunction with the use of state-of-the-art high temperature resin adhesives, results in an extremely linear motor assembly. The 15NLW9400 ability to perform properly under inclement weather conditions has been achieved using a special coating applied to both the top and back plates.

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