... . Impedance: 4 ohms 5. Low price Specification: Size(Type) :5.25" component car audio speakers RMS: 50WFrequency Response: 50-20kHzNominal impedance ... : 4 ohmsMidbass: 1, 5.25" midbass with paper cone 2, 88dB SPL 3, Rubber Edge ... , 2, High-end Germany Silk diaphragm 3, Plastic housing 4, 25/28/30mm are all available. 5 ...