10W-200W; 125W recommended amp power; 8 polycarbonate woofer; .5 poly dome tweeter; 2 voice coils a& 2 tweeters; Freq resp: 40Hz-21kHz; Sensitivity: 90dB at 1W/1m; Impedance: 8ohm ; Gold-plated terminals; Overall speaker dim: 10.75 round x 3 deep ; Required cutout: 9.25 dia ; Each; Not suitable for single channel use;