Visit Amazon sites : br Crystal Acoustics THX? Select Certified THX-CT-BL Center Speakerbr br Awarded THX Select Certified Center speaker br Rotating tweeter on-top for clear diffraction free highs br Electronic protection at the tweeter for safe function at high levels br Controlled disperion for real-life dialogues anywhere you sit br Magnetically shielded for safe placement next to your TV and HTPC