HS84W 10"Power Woofer/15" AOSV VC Impedance: 4ohm Power:100 Watts Freq.: 25?Hz-200Hz HS84C 1" Silk Dome Tweeter 4-4" Paper Cone Impedance: 4ohm Power: 100Watts Freq.: 80Hz-19KHz Sensitivity: 84dB HS84S 1" Silk Dome Tweeter 2-4" Paper Cone Impedance: 4ohm Power: 80Watts Freq.: 80Hz-19KHz Sensitivity: 86dB HS84 1" Silk Dome Tweeter 2-4" Paper Cone Midrange 8"Power Woofer/1.5" AL VC Impedance: 4ohm Power: 150Watts Freq.: 40Hz-20KHz Sensitivity: 85dB