KS-4 specification:(Satellite) Driver built-in: 4" point source driver Frequency response: 95Hz-20KHz Impedance: 4 Ohm Rated power: 25W Max power: 40W S.P.L: 85dB Cabinets: Fiber glass with high gloss paint Dimensions: 166 x 166 x 140 (mm) (W x H x D)