Weight 3.1 lb (1.41kg); Included Accessories Includes an extreme climate round zero-bezel magnetic grille; Nominal Impedance 8 ohms Mounting depth 2.72" (69.1mm) deep; Recommended Amplifier Power 10 - 100 Watts RMS (per channel); Sensitivity (2.83V/1m) 85dB; Frequency Range -3dB from 50-15kHz; -10dB from 3618kHz; Dimensions (H x W x D) Round grille finished dimension (dia.); Dimensions Round grille finished dimension (dia.); Shipping weight 4.6 lb (2.1kg)