Product typeLoudspeaker ChassisTypePANominal Diameter18 ", 457.2 mmVoice Coil4 ", 101.6 mmOverall diameter457.2 mmPitch Circle Diameter438.2 mmCut- out Measurement420.5 mmDiameter of fixing holes7.1 mmDepth207 mmNominal Impedance4 Ohm(s)Nominal Load Capacity800 Wmaximum rated load1600 WSensitivity (1 W / 1 m)96.4 dBFrequency response40 - 800 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap9.53 mmThiele & Small ParameterFs (Resonance Frequency)23 HzRe (DC resistance)2.5 Ohm(s)Qms (mechanical quality)6.41Le (inductance of the voice coil)0.61 mHQes (electrical quality)0.29Qts (overall quality)0.28Vas (equivalent volume)639Mms (moving mass)137 gBL (power factor)13.4 T/mXmax (maximum displacement)4.8 mmCms (elasticity of the suspension)0.34 mm/NSd (membrane area)1159 cm2Weight12,138 kg
