Insignia - 5-1/4 2-Way Bookshelf Speakers Pair 5-1/4" woofer Delivers crystal-clear audio. 3/4" silk-dome tweeter Offers crisp high frequencies. 2-way speaker system Sounds like 1 source rather than several separate sources. 80Hz - 20kHz frequency response For faithful sound reproduction. 8 ohms nominal impedance Ensures efficient conduction of power through the speaker.