Like many audio, video, and data cables, HDMI cords can suffer from signal degradation at longer lengths—50 feet is generally considered the maximum reliable length. And it's rare to see an HDMI cable longer than 25 feet in a store. Even online, cables more than 50 feet long can be hard to find. If your TV, set-top box, and other AV equipment are all on the same piece of furniture, this isn't much of a concern. With a collocated setup, you'll probably never need more than 6 feet of cable at a time. But HDTVs have introduced a whole new way of arranging home theater gear. Flat screens are increasingly thin and lightweight, and their picture-frame profiles make them perfect for hanging on walls. Similarly, HD home theater digital projectors are now affordable enough for non-gazillionaires to set up a basement cinema.