KLH HTA-9906 6-Piece 550-Watt Home Theater System 6-Piece 550 Watt Home Theater Speaker System 6.5" 50 Watt Frontfiring Powered Subwoofer Satellite/Center w/4" Polypropylene Woofer &amp; 5/8" Piezo Electric Tweeter Magnetically shielded Satellites &amp; Center Speakers