Product highlights: component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers 6-1/2" Plus One+ glass-fiber woofer cone with hi-roll rubber surround edge-driven aluminum dome tweeter 3-ohm impedance tweeter level adjustment: 0 or -3 dB handles up to 110 watts RMS (330 watts peak power) frequency response: 45-40,000 Hz sensitivity: 93 dB at 2.83 volts grilles not included