I am looking for a sub woofer to go along with the 80 sharp led tv. Its a pritty big room with 3 couchs and a chair. Hard Floor no rug. I cant decide from these 3 sub woofers. 15" Home Theater Sub Powered Surround Sound Down Firing Subwoofer 600W SUB15D | eBay 15" Home Theater Sub Powered Surround Sound Subwoofer 600W New SUB15F | eBay http://www.amazon.com/Polk-Audio-12-Inch-Powered-Subwoofer/dp/B000092TT0/ref=pd_cp_e_1