Description: Evolution® C5 5.0 x 7.0 in. / 125 x 180 mm 2-Way Component Systems: 5.0 x 7.0 in. / 125 x 180 mm Woofers; 0.75 in. / 19 mm Silk Soft Dome Tweeters Grilles Not Included Also fits 6x8-inch factory locations. Woofers: Cast Alloy Frame, Patented Elevated Frame Cooling (U.S. Patent #6,219,431 & #6,229,902), DMA-Optimized Motor System, Mineral-Filled Polypropylene Cone, Butyl Rubber Surround, 1-in. / 25 mm Voice Coil, Kapton® Former, Low-Profile, Symmetrical Roll Spider, Ferrite Magnet Tweeters: 0.75 in. / 19 mm Silk Soft Dome, RSR Variable-Angle Flush-Mount System, Ferrofluid Cooling and Damping, Neodymium Magnet Crossover Networks: 2-way network with 1st order low-pass and 2nd order high-pass circuit, premium Mylar® capacitors, air-core inductors, 4-position adjustable tweeter output level, 3-position midrange presence control, Polyswitch tweeter protection Continuous Power Handling: 75 Watts Peak Music Power: 225 Watts Rec. Power Range (per channel): 25 - 150 Watts System Efficiency: 90.5 dB @ 1W/1m System Nominal Impedance: 4 ohms System Frequency Response: 48 Hz - 25 KHz (± 3 dB)