XS-65 - Image Dynamics 6.5" 2-Way Component Speaker System Composite multi layer ceramic fiber and Rohacell cones structure Voice coil (Single or dual): Single | Voice coil impedance (ohms): 4 | Voice coil Diameter (inches/mm): 1.4/35.56 | Recommended Power Range (watts): 15 to 125 Mounting Diameter Tweeter(inches): 1.97 | Mounting Depth Tweeter(inches): 0.8 Mounting Diameter Midbass(inches): 5.57 | Mounting Depth Midbass(inches): 3.6 Power: 25-250 Watts | Impedance: 4 Ohms | Sensitivity: 92dB | Frequency Response: 45Hz-25Khz