Features Made to offer exceptional sound quality; Clear sound at high frequencies; 1 in. high-temperature Kapton voice coil; Diamond chrome cutting finish; Ferro fluid enhanced voice coil; Specifications Frequency Response: 2000 - 25000Hz; Impedance: 4 Ohms; Magnet: 6 oz; Power (PMPO): 350W; Power (RMS): 175W; Sensitivity: 99 dB; Weight: 3 lbs;.