3-way, 3-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, 100 W Maximum Input Power