vehicle-specific component speaker system includes two woofers and two tweeters 6x 9 polypropylene woofer cone 1 silk dome tweeter with inline crossover Designed to fit in select Ford / Lincoln 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: 65-20,000 Hz impedance: 4 ohms sensitivity: 89 dB woofer mounting depth: 1-13/16