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"\nClass ceiling \n\nBose's Virtually Invisible 791 speakers  promise evenly distributed stereo sound over a wide area.  For straightforward installation, four clamps are used to secure each speaker to the ceiling. A simple twist of  the grille snaps them into place. Each speaker combines a seven-inch woofer and two tweeters  to eliminate so-called 'hot  spots', harsh high frequencies. The 791 speakers sell for HK$5,200 a pair at Bose retail stores and authorised dealers.\n\nAttention to detail \n\nSimilar in de..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.scmp.com/article/703241/gadget-corner>