SSL F246 FORCE 200-watt 2 way auto 4" x 6" Coaxial Speaker 4" x 6" 2-Way Speaker, 200 Watts, Poly injection Conepeak power handling 200Wmagnet structure 20 Oz. efficiency 1W/1M 90dBimpedance 4 ohm frequency response 100Hz-18kHzmounting depth: 1-7/8 Poly Injection Cone peak power handling 200W magnet structure 20 Oz. frequency response 100Hz-18kHz mounting depth 1-7/8"