This Is A Brand NEW Original 18 Sound D KIT ND-1050 8 ohm Diaphragm. The transducer diaphragm assembly is composed of a titanium dome sandwiched to a proprietary treated polyester suspension. This design maintains low resonance and lowers the minimum crossover point value to 1.6kHz. An edge-wound aluminum voice coil, wounded on proprietary treated Nomex, completes diaphragm assembly. Thanks to its physical properties, the proprietary treated Nomex former shows 30% higher value of tensile elongation at working operative temperature (200°C) when compared to Kapton. Moreover, this material is suitable to work also in higher moisture contents environments. The ability to perform properly under inclement weather conditions is a key-point of the Eighteen Sound philosophy. General Specification : Rated Impedance : 8 ohm D.C. Resistance : 5,8 ohm Minimum Impedance: 6,5Ohm at 5000 Hz AES Power: 50W above 1.6 kHz Program power : 100W above 1.6 kHz Sensitivity : 110 dB Frequency Range: 1600Hz- 20kHz Recomm. Xover Frequency: 1600Hz 12dB/oct slope Diaphragm material : Titanium Voice Coil Diameter : 44,4mm(1 3/4 in) Voice Coil winding material : Edge-wound aluminu