Throat Diameter 1.0 inch (25mm) Diaphragm Diameter 2 Inch(51.5mm) Nominal Impedance 8 Ohm Voice Coil DC Resistance 6.6 Ohm Power Handling 180W Sound PressureLevel (Loaded with 90x40 Horn) 110dB Frequency range 1200-20000HZ Mounting Type Screw-on Magnet Type Ferrite Magnet size 135x60x20mm Diaphragm Material Titanium Recommended Crossover 1.2kHz or higher (12dB/oct slope) Net Weight 2.87kg/pc Gross Weight 2,94kg/pcs Packing Size 13,5 13,5*9cm/pcs