Model no.: GS-6596System: 6.5" 4-way Coaxial car speakersWoofer: Injection-molded polypropylene coneMagnet: Ferrite 12 Oz Voice coil:25 mm ASV Surround edge: RubberFre.Res.:50-20K HzSensitivity:90dB/W/mImpedance: 4 ohmsRMS power: 30 W