SSL F365 FORCE 300-watt 3 way auto 6.5" Coaxial Speaker (Discontinued by Manufacturer) 6.5" 3-Way Speaker, 300 Watts, Poly injection Cone peak power handling 300Wmagnet structure 40 Oz. Efficiency 1W/1M	90dBImpedance 	4 ohm frequency response 100Hz-18kHz Mounting depth: 2-1/8"Mounting Hole: 5-1/2" Diameter Poly Injection Cone peak power handling 300W magnet structure 40 Oz. frequency response 100Hz-18kHz mounting depth 2-1/8"