Model number: GS-M1000
System: 4" Mid-range car speakersWoofer: Injection-molded polypropylene coneMagnet: Y30 Ferrite 6.5 Oz Voice coil:25 mm KSV Surround edge: RubberFre.Res.:80-22K HzSensitivity:90dB/W/mImpedance: 4 ohmsRMS power:30 W