Phoenix Gold RSDC124 12-Inch 4-Ohm Competition Subwoofer Power Handling (RMS/Peak): 600W/1200W Sensitivity: 92dB @ 2.83/1M Frequency Response: 27Hz - 250Hz Impedance: 4/4 Ohms High Excursion Butyl Rubber Surround with Expanded Polypropylene Cone