Product typeLoudspeaker ChassisTypePANominal Diameter18 ", 457.2 mmVoice Coil4 ", 101.6 mmOverall diameter457.2 mmPitch Circle Diameter438.15 mmCut- out Measurement420.62 mmDiameter of fixing holes7.36 mmDepth211.07 mmNominal Impedance4 Ohm(s)Nominal Load Capacity1200 Wmaximum rated load2400 WSensitivity (1 W / 1 m)94.5 dBFrequency response36 - 820 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap12.7 mmThiele & Small ParameterFs (Resonance Frequency)31.48 HzRe (DC resistance)3.13 Ohm(s)Qms (mechanical quality)10.13Le (inductance of the voice coil)1.09 mHQes (electrical quality)0.35Qts (overall quality)0.34Vas (equivalent volume)317.02Mms (moving mass)147.56 gBL (power factor)16.1 T/mXmax (maximum displacement)8.13 mmCms (elasticity of the suspension)0.17 mm/NSd (membrane area)1159 cm2Weight13,97 kg
