Size: 5-1/4' Design: Coaxial 2-Way Tweeter Design: 1-3/16' Balanced Dome Tweeter Composition: Polyethylene Terephthalate (PET) Woofer Composition: Injected Molded Polypropylene & trade; (IMPP) with MICA Woofer Surround: Rubber Coated Cloth Woofer Magnet Composition: Ferrite Max. Music Power (Nominal): 250W (35W) Frequency Response: 33Hz to 24k Hz Sensitivity (1W/1 m): 88 d B Impedance: 4 Ohms Mounting Depth: 1-3/4' Cut-Out Dimensions: 4-3/4'