FOUR Audio 4-KF130

5.25″ coaxial speaker 2-way RMS Power handling: 50W Peak Power handling: 100W Frequency response: 70Hz - 25kHz Sensitivity: 90dB/W/m Impedance: 4Ω Mounting depth: 38mm Resonance free IMPP cone Wide range 20mm PEI tweeter Universal Flat Design basket.