Yorkville C170 Coliseum Speaker 2 Way Passive 8 Inch Woofer 1 inch Tweeter 100 Watts 8 Ohms 100 Watt Mini Series Speaker. 90 x 90 degree HF Driver. 8-inch Woofer with 1-inch Mylar Dome Tweeter. Integrated 70-Volt Matching Transformer. 60 to 20,000 Hz Frequency Response.