Type : co-axialConfiguration : 2-waySpeaker Size : 5.25″RMS Power : 70 wMinimum Input : 35 w RMSPeak Power : 210 wSensitivity : 90 dbFreq. Response : 60 Hz – 25 khzImpedance : 4 OhmsMounting Depth : 46mmMounting Diameter : 114 mmVoice Coil Diameter : 25mmMagnet material : FerriteMagnet weight : 10 OzMagnet rating : Y30Recommended Amplifiers : SLICK a0/a1