STS 800 OPTIMUS TOWER SPEAKER (400-4068) Features Faxback Doc. # 32933 200-Watts maximum power - ideal as a main speaker in your home audio system 8" polypropylene woofer 5" polypropylene midrange 3/4" mylar cone tweeter 45-20,000 Hz response 88 dB sensitivity 8 ohm impedance handsome ebony-ash wood finish (BR/EB 5/7/96)