A:AnswerYes they should but they need to be mounted securely in the wall depending on what you're putting the screws in big screws for the wood and extra big plastics in the plaster walls
A:AnswerI used them on a philips home theatre system and it worked just fine, just as long as there are holes in the rear of the speakers you should be okay.
A:AnswerWires cannot be hidden. That would have been a nice feature for sure, but it would also lose some of the strength. IMO. You could strap the wire on the backside in black to hide. Mine are not and they really don't stick out too much.
