http://engineeringtv.com/blogs/etv/archive/2008/10/15/thx-balanced-bass-line-technology.aspxTHX partnered with BG Radia to design and develop the BGX-4850, an in-wall subwoofer system that delivers THX Ultra2 Certified performance in a design that fits completely inside a standard 2x4-inch stud-wall. The BGX-4850 system consists of four bassenCommunityServer 2007.1 (Debug Build: 20917.1142)http://engineeringtv.com/blogs/etv/archive/2008/10/15/thx-balanced-bass-line-technology.aspx#30083Wed, 15 Oct 2008 19:49:28 GMT47e16688-3829-4dd3-b275-52b24bfef241:30083corey6423<p>this is a great video!</p> <img src="http://engineeringtv.com/aggbug.aspx?PostID=30083" width="1" height="1">