Yamaha NS-225F 2-Way Bass-Reflex Tower Speaker (Single, Black Finish) (Discontinued by Manufacturer) High-quality 2-way bass-reflex floor-standing tower speaker, sold individually Dual 3.12-inch polymer-injected mica diaphragm cone woofers and 1.12-inch dome tweeter per speaker 60 Hz to 50 kHz frequency response; magnetically shielded to prevent video interference Slim profile matches flat-panel and plasma TVs; gold-plated binding posts 120 watts max input power (40 watts nominal); 9.3 by 41.3 by 9.3 inches (W x H x D)