On Feb 15, 12:15*pm, Bill wrote:

What ever you put in WILL be wrong!

True. Especially if you don't have the equipment planned before you
start.

Some people hang the TV off a false wall, built ~15cm in front of the
real one. You can hide anything behind it then, and get behind it
fairly easily (depending on how you build it). Much easier than
channelling into stone walls.

Cheers,
David.