Speaker Size : 5-1/4" Design : 2-Way Sensitivity : 90 dB Frequency Response : 45 Hz - 20 kHz Peak Power Handling : 70 watts RMS Power Handling : 35 watts Impedance : 4 ohms Curvilinear Injection-Molded Polypropylene (CIMP) woofer cone High-Temp Polyimide Film Voice Coil Former Optimized Polyfoam Ribbed Surround Radius 1/2" PEN semi-dome tweeter Neodymium tweeter magnet New Enhanced BAM (Basket and Motor) Assembly High-Power Tinsel Lead Wires Ferro-fluid cooled tweeter voice coil Top Mount Depth : 1-7/8" Bottom-mount depth : 2-1/8" Cutout Dimensions : 4-1/2