Product typeLoudspeaker ChassisTypePANominal Diameter15 ", 381 mmVoice Coil4 ", 101.6 mmOverall diameter388 mmPitch Circle Diameter371 mmCut- out Measurement358 mmMounting holes8Diameter of fixing holes7 x 8 mmDepth184 mmNominal Impedance8 Ohm(s)Nominal Load Capacity900 Wmaximum rated load1800 WSensitivity (1 W / 1 m)98 dBFrequency response40 - 2500 HzVoice Coil MaterialcopperMagnetNeodymiumDepth of the magnetic gap10 mmThiele & Small ParameterFs (Resonance Frequency)39.7 HzRe (DC resistance)5.9 Ohm(s)Qms (mechanical quality)5.34Le (inductance of the voice coil)1.5 mHQes (electrical quality)0.24Qts (overall quality)0.23Vas (equivalent volume)152Mms (moving mass)11.4 gBL (power factor)26.4 T/mXmax (maximum displacement)± 5 mmCms (elasticity of the suspension)0.14 mm/NSd (membrane area)880 cm2Weight5,7 kg