Driver Units: 8" Polypropylene Cone Woofer with Sealed Voice Coil - 1" Coaxial Polyamide Dome - Power Rating: 200 Watts - Frequency Response: 35Hz - 20kHzNominal Impedance: 8 Ohms - Sensitivity: 91d - BColor: Grey - Dimensions & Weight: H 12" x W 11 1/2" x D 14" - 30 lbs.