Size: 6″ x 9″ Tweeter Design: 2″ Cone midrange and 3/8″ Dome tweeter Woofer Composition: Injected Molded Polypropylene™ (IMPP) with MICA Woofer Magnet Composition: Ferrite Design: Coaxial 3-Way Tweeter Composition: Polyethylene Terephthalate (PET) Woofer Surround: Rubber Coated Cloth Max. Music Power (Nominal): 400W (45W) Sensitivity (1W/1 m): 90 dB Frequency Response: 32 Hz to 32 kHz Impedance: 4 Ohms