Yamaha NS-FP4600 5.1-Channel Slim-Profile Surround Speaker System (Silver) (Discontinued by Manufacturer) Features powerful plasma-slim profile speakers Front speakers include quad four-inch woofers and 0.75-inch soft dome tweeters Surround speakers include three-inch woofers and a 0.5-inch balanced dome tweeter Powered subwoofer with advanced YST/QD bass technology and an eight-inch cone woofer driver Satellite speakers sport a removable grill cloth and magnetic shielding