FOUR Audio 4-KF100

4″ coaxial speaker 2-way RMS Power handling: 40W Peak Power handling: 80W Frequency response: 90Hz - 25kHz Sensitivity: 89dB/W/m Impedance: 4Ω Mounting depth: 42mm Resonance free IMPP cone Wide range 20mm PEI tweeter Universal Flat Design basket.