Eighteen Sound ND32ST-8 2-inch Exit Neodymium Compression Driver with Very Fast Impulse Response 8-Ohm for Excellent Transient Reproduction 120-Watts RMS 240 PeakFEATURES :: 2 inch exit Neodymium compression driver || Very fast impulse response for excellent transient reproduction || Natural Sound frequency response extended up to 20 kHz || 240 W program power handling || 112 dB 1W / 1mt sensitivity || 75 mm (3 in) Edgewound CCAW voice coil || Titanium diaphragm with proprietary suspension geometry || Next gen 4-slot metal alloy phase plug design || Copper sleeve for reduced distortion and increased high end output ||"SPECIFICATIONS || Throat Diameter : 50 mm (2.0 in) || Nominal Impedance : 8 Ω || Minimum Impedance : 6.4 Ω || Nominal Power Handling1 : 120 W || Continuous Power Handling2 : 240 W || Sensitivity3 : 112.0 dB || Frequency Range : 0.8 - 20.0 Hz || Recommended Crossover : 1.2 kHz Voice Coil Diameter : 75 mm (3.0 in) || Winding Material : aluminum || Diaphargm Material : Titanium|| Flux Destiny : 2.1 T Magnet Material : Neodymium ||"MOUNTING AND SHIPPING INFO || Overall Diameter :: 120 mm (4.72 in) || Depth :: 53 mm (2.09 in) || Net Weight :: 2.8 kg (6.71 lb) || Shipping Weight :: 2.9 kg (6.39 lb) || Shipping Box :: 165 x 150 x 65 mm (6.50 x 5.91 x 2.56 in )"The ND32ST neodymium magnet assembly has been designed to obtain 21KGauss in the gap for major benefits in transient response. The motor structure, throughout the precisely coherent proprietary designed metal alloy phase plug with 4 circumferential slots and copper ring on the pole piece, reduces inductance effect and distortion. The diaphragm kit self-centering design allows high precision mounting and at the same time makes very easy the servicing procedure. ||The ability to perform properly under inclement weather conditions is a key point of the Eighteen Sound philosophy. Hence, a special treatment is applied to the magnet and the top and back plates of the magnetic structure in order to make the driver more resistant to the corrosive effects of salts and oxidization. This treatment is more effective than any other coating commonly used.