Sony SSCS3 3-Way Floor-Standing Speaker (Single) 3-way, 4-speaker bass-reflex system, 5-1/4" Foamed-Mica Cellular Reinforced Woofer, 1" Polyester Main Tweeter 3/4" Sony Super Tweeter for immersive sound staging, Sound Reproduction to 50kHz (for High Resolution Audio), 6 ohm Speaker Impedance Optimized Crossover componentry for a clear audio path, 145 W Maximum Input Power, One Speaker per Carton