TypeSubwooferNominal Diameter18 ", 457.2 mmVoice Coil4 ", 101.6 mmOverall diameter457.2 mmPitch Circle Diameter438.2 mmCut- out Measurement420.6 mmDiameter of fixing holes7 mmDepth207 mmNominal Impedance8 Ohm(s)Nominal Load Capacity1250 Wmaximum rated load2500 WSensitivity (1 W / 1 m)95.8 dBFrequency response33 - 300 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap9.53 mmThiele & Small ParameterFs (Resonance Frequency)32 HzRe (DC resistance)5.07 Ohm(s)Qms (mechanical quality)10.15Le (inductance of the voice coil)1.59 mHQes (electrical quality)0.49Qts (overall quality)0.47Vas (equivalent volume)331.5Mms (moving mass)143.17 gBL (power factor)17.2 T/mXmax (maximum displacement)10 mmCms (elasticity of the suspension)0.18 mm/NSd (membrane area)1159 cm2Weight13,028 kg
