Product typeLoudspeaker ChassisTypePANominal Diameter12 ", 305 mmVoice Coil4 ", 101.6 mmOverall diameter318 mmPitch Circle Diameter300 mmCut- out Measurement283 mmMounting holes8Diameter of fixing holes7 x 8 mmDepth151 mmNominal Impedance8 Ohm(s)Nominal Load Capacity1100 Wmaximum rated load2200 WSensitivity (1 W / 1 m)95 dBFrequency response40 - 1700 HzVoice Coil MaterialcopperMagnetNeodymiumDepth of the magnetic gap10 mmThiele & Small ParameterFs (Resonance Frequency)39 HzRe (DC resistance)5.7 Ohm(s)Qms (mechanical quality)4.6Le (inductance of the voice coil)0.66 mHQes (electrical quality)0.31Qts (overall quality)0.29Vas (equivalent volume)71Mms (moving mass)9.2 gBL (power factor)20.4 T/mXmax (maximum displacement)± 8 mmCms (elasticity of the suspension)0.18 mm/NSd (membrane area)531 cm2Weight4,7 kg