30 watts RMS per speaker; 200 watts max Designed to replace car's 6.5 in. factory speakers with woofer and tweeter components Frequency response: 71 Hz to 19.5 kHz for faithful sound reproduction Impedance: 4 ohms Sensitivity: 90 dB at 1 watt/1 meter ( /-3 dB) .5 in. PEI tweeters with sound lens are lightweight, heat-resistant, and retain their shape even after prolonged use, allowing accurate sound Treated foam surrounds for greater efficiency Composite polypropylene cones for smooth and well-damped mid-bass sound Mounting depth: 2.2 in. Includes open-design grilles for woofers, screws, and installation manual System with 2 each of cone woofers and PEI tweeters