"18 Sound 12ND610 8-Ohm 12-inch High Power Midbass Woofer with Neodymium Magnet || Nominal Diameter: 300mm (12 in) || * Rated Impedance: 8 Ohm || * AES Power: 450W || * Program Power: 700W || * Peak Power: 1500W || * Sensitivity: 102dB || * Frequency Range: 80 - 5500 Hz || * Power Compression @-10dB: 0.7 dB || * Power Compression @-3dB: 1.9 dB || * Power Compression @Full Power: 2.4 dB || * Max Recomm. Frequency: 2000 Hz || * Recomm.Enclosure Volume: 8 - 40 lt.(0,28 - 1.41 cuft) || * Minimum Impedance: 4.2 Ohm at 25 DegreesC || * Max Peak To Peak Excursion: 23 mm (0.91 in) || * Voice Coil Diameter: 75 mm (3 in) || * Voice Coil winding material: aluminum || * Suspension: Triple roll, polycotton || * Cone: Curvilinear, Paper || The 12ND610 is an extremely high output neodymium mid-bass transducer perfect for high quality professional systems. It has been designed for midrange and midbass frequency reproduction in horn-loaded, as well as bass-reflex compact enclosures. * The transducer's extremely powerful neodymium magnet assembly assures high flux concentration, low power compression and excellent heat exchange. || The levels of force factor and power handling result in the best power to weight ratio on the market today. * 12ND610 curvilinear paper cone has been designed by 18 Sound engineers with a special high-strength wood pulp to achieve the best possible linearity within its intended frequency range and to control bell-mode resonances around the cone circumference. * Its cone is capable of carrying significant loadings thanks to a dedicated reinforcing treatment. || The cone is carried by a multiroll suspension built from a linen-like material, which is more resistant to aging and fatigue than traditional materials. * The 75 mm (3 in) state-of-the-art inside outside voice coil is similar to the one fitted to our top-of-the-range 18-in and 15-in models but it's wound with aluminum wire. It employs the Interleaved Sandwich Voice coil (ISV) technology in which a high strength fiberglas former carries windings on both the outer and inner surfaces to achieve a mass balanced coil. || * The final result is an extremely linear motor assembly with a reduced tendency for eccentric behavior when driven hard. * A proprietary humidity-block cone treatment makes the transducer suitable for outdoor use in adverse weather conditions. In addition, a special coating applied to both the top and back plates makes the 12ND610 far more resistant to the corrosive effects of salts and oxidization."