Product typeLoudspeaker ChassisTypePANominal Diameter12 ", 304.8 mmVoice Coil4 ", 101.6 mmOverall diameter314.3 mmPitch Circle Diameter294.3 mmCut- out Measurement281 mmDiameter of fixing holes7 mmDepth135 mmNominal Impedance8 Ohm(s)Nominal Load Capacity600 Wmaximum rated load1200 WSensitivity (1 W / 1 m)94 dBFrequency response49 - 2500 HzVoice Coil MaterialcopperMagnetFerriteDepth of the magnetic gap9.53 mmThiele & Small ParameterFs (Resonance Frequency)46 HzRe (DC resistance)5.85 Ohm(s)Qms (mechanical quality)5.74Le (inductance of the voice coil)1.17 mHQes (electrical quality)0.38Qts (overall quality)0.35Vas (equivalent volume)59.4Mms (moving mass)86 gBL (power factor)19.6 T/mXmax (maximum displacement)6.2 mmCms (elasticity of the suspension)0.14 mm/NSd (membrane area)552 cm2Weight11,25 kg