mirage Omni 150 Bookshelf Speakers (Pair), Black One pair of OMNI150 (Black) Video-shieldedFrequency response 55-20,000 Hz (a3dB)Omnipolar technology creates a larger, more realistic soundstage1" aluminum dome tweeter5-1/2" fiberglass composite woofer8-ohm impedanceSensitivity 87 dBHandles up to 100 wattsBinding posts 5-1/2&quot; Fiberglass Composite Woofer Omnipolar Technology creates a larger, more realistic soundstage