Product highlights: component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers 6"x9" Plus One+ glass-fiber woofer cone with hi-roll rubber surround 3/4" edge-driven aluminum dome tweeter 3-ohm impedance tweeter level adjustment: 0 or -3 dB handles up to 145 watts RMS (435 watts peak power) frequency response: 35-40,000 Hz sensitivity: 94 dB at 2.83 volts top-mount depth: 3-3/16 grilles not included