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rocketfish product i linked doesn't eliminate all cables, but
it does eliminate the front-to-back need. that's the only way i've seen rear wireless setups work: wired speakers and sub, wireless signal to the rear, rear speakers wired to each other. but like i said, i have no personal experience with them. <font color="purple"> </font> <font color="purple"> </font>
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For someone with a nice stand or piece of furniture running against a wall 3.1 doesn't require that many wires in plain sight. But the rears and sides for a 5.1 and or 7.1 are usually mounted higher and well apart so even with Rocketfish you have to run wires from the receiving unit to the actual speakers. That's still covers a lot of wall and is hard to hide for most people.
~ Rick