Product typeLoudspeaker ChassisTypePANominal Diameter18 ", 460 mmVoice Coil4 ", 100 mmOverall diameter460 mmPitch Circle Diameter440 mmCut- out Measurement422 mmMounting holes8Diameter of fixing holes7.4 mmDepth223 mmNominal Impedance8 Ohm(s)Nominal Load Capacity1600 Wmaximum rated load3200 WSensitivity (1 W / 1 m)97 dBFrequency response30 - 1500 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap15 mmThiele & Small ParameterFs (Resonance Frequency)32 HzRe (DC resistance)5.4 Ohm(s)Qms (mechanical quality)10Le (inductance of the voice coil)1.68 mHQes (electrical quality)0.39Qts (overall quality)0.37Vas (equivalent volume)171.2Mms (moving mass)259 gBL (power factor)27 T/mXmax (maximum displacement)13 mmCms (elasticity of the suspension)0.1 mm/NSd (membrane area)1124 cm2Rms (mechanical loss resistance)5.2 kg/sWeight14,7 kg