vehicle-specific component speaker system includes two woofers and two tweeters 6x 9 molded polypropylene woofer cone 2-3/4 silk dome tweeter with inline crossover designed to fit in select GM and Chevrolet vehicles vehicle-specific installation gear and wiring adapters included works with factory radio, aftermarket stereo, or amplifier handles up to 80 watts RMS (160 watts peak) frequency response: 65-19,000 Hz impedance: 4 ohms sensitivity: 89 dB woofer mounting depth: 1-1/4