Product typeLoudspeaker ChassisTypePANominal Diameter12 ", 304.8 mmVoice Coil2.5 ", 63.5 mmOverall diameter305.5 mmPitch Circle Diameter294.3 mmCut- out Measurement278.1 mmDiameter of fixing holes6.4 mmDepth136 mmNominal Impedance8 Ohm(s)Nominal Load Capacity500 Wmaximum rated load1000 WSensitivity (1 W / 1 m)94.6 dBFrequency response44 - 3000 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap9.53 mmThiele & Small ParameterFs (Resonance Frequency)51 HzRe (DC resistance)6.06 Ohm(s)Qms (mechanical quality)7.28Le (inductance of the voice coil)1.45 mHQes (electrical quality)0.51Qts (overall quality)0.47Vas (equivalent volume)67.9Mms (moving mass)51 gBL (power factor)14.1 T/mXmax (maximum displacement)4.8 mmCms (elasticity of the suspension)0.19 mm/NSd (membrane area)506.7 cm2Weight5,81 kg