RMS Power Handling: 40 Watts Maxx Power: 250 Watts Speaker Impedance: 4 Ohms Frequency Response +/- 3dB: 55Hz-19kHz Sensitivity (1 watt/1 meter): 88 db Crossover Point: 6 khz Crossover Slope: 12dB Rubber Surrounds Alpha-Cellulose Poly Woofer Cones Mylar Dome Tweeters Anti-Resonant Stamped Steel Basket Pure Copper Voice Coils Mounting Depth/Chassis Depth: 3"e; Grills NOT Included