Coaxial speaker with 50 watts RMS and 200 watts peak powerImpedance of 4 ohmsSound pressure level of 90 dB at 1 W/1 mFrequency range from 45 Hz to 20 kHzMounting diameter of 126 x 182 mmInstallation depth of 56 mmMaterial: steel frames, polypropylene cones, PEI tweeter