Product Name: Car AudioModel Number: T-2-60Place of Origin: ChinaPower Handling RMS/Max: 250/500Magnet Weight: 60 OZMounting template diameter: 315mmMounting Depth: 95mmMounting Coil Diameter: 2.5Nominal Impedance (ohms):4 ohmsFS (HZ):21.99Qms: 3.34Qes: 0.68Qts: 0.56Vas (liters):103C ms (micro Newton):280.6X max (mm):11Sensitivity (dB):84M ms (grams):186.6Voice Coil Diameter: 2.5Voice Coil Length: 2.6Voice Coil Layers: 4