Speaker Power Handling RMS (Watts) (One Speaker, Using Appropriate Crossover) 400 Continuous RMS Power (Watts) (One Speaker, Using Appropriate Crossover & 0%THD) 300 Overall Diameter (mm) 260 Magnet Diameter (mm) (Including Magnet Protector Where Applicable) 156 Installation Cut-Out Diameter (mm) 234 Overall Depth (mm) 114 Mounting Depth (mm) 104 Front Protrusion From Mounting Plane (mm) 10 System Frequency Response (Hz) (Indicative Of Usable Range But Not Suitability) 80-6500 Impedance (Ohm) (Nominal) 4 Sensitivity (db/1Wm) 98.1 Total Magnet Weight (Oz) 53.8 Magnet Size (mm) 156*20*1pc Magnet Type Y35 Magnet Qty 1 Top Plate thickness (mm) 8 Back Plate Thickness (mm) 8 Voice Coil Former Spec Kapton Voice Coil Type CCA Round Wire Voice Coil External Diameter (mm) 60 Voice Coil Winding (Layers) 2 Cone Type Non Pressed Paper Spider Compliance Medium Spider Type Linear Spider Diameter (mm) 130 Spider Design Single Surround Triple Roll Surround Material Cloth Tinsel Wire Single Terminal Push