Product typeLoudspeaker ChassisNominal Diameter12 ", 304.8 mmVoice Coil2 ", 50.8 mmOverall diameter305.5 mmPitch Circle Diameter294.3 mmCut- out Measurement278.1 mmDiameter of fixing holes6.4 mmDepth114 mmNominal Impedance8 Ohm(s)Nominal Load Capacity225 Wmaximum rated load450 WSensitivity (1 W / 1 m)97.7 dBFrequency response48 - 8000 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap7.92 mmThiele & Small ParameterFs (Resonance Frequency)45 HzRe (DC resistance)7.37 Ohm(s)Qms (mechanical quality)6.44Le (inductance of the voice coil)0.83 mHQes (electrical quality)0.55Qts (overall quality)0.51Vas (equivalent volume)136.3Mms (moving mass)36 gBL (power factor)11.7 T/mXmax (maximum displacement)3.2 mmCms (elasticity of the suspension)0.34 mm/NSd (membrane area)532.4 cm2Weight4,05 kg