6″ x 9″ A Series 4-way Coaxial Car Speakers Power Handling: Peak: 900 watts per pair / 450 watts each RMS: 180 watts per pair / 90 watts each CEA-2031 compliant Carbon Mica cone material Elastic Polymer speaker surround 0.71″ PET Hard Dome Tweeters Copper Voice coil Glass Imide voice coil bobbin Iron Plate Press basket material 11.39 oz. Ferrite magnet motor structure Includes multi-fit installation adaptors Top-mount Depth: 2.83″ Cutout Dimensions: 6.02″ x 8.74″ Impedance: 4 ohms Frequency Response: 29 – 28000 Hz Sensitivity: 92 dB Speaker grilles included