Join Date: May 2002
Location: Toronto, Rogers, 9865 & 8300-eHDD, Sharp LC75N8000U, Denon AVR4310Ci; Sony KDL40W3000, 9865
With a 60" TV, you should be able to cut a hole (about a 6 x 6") behind the TV to get into the cavity above the fireplace and run a speaker wire to the right of the fireplace.
You can either fix the "hole" or leave it since it's behind the TV. The "channel" I was talking about was not through the fireplace, but rather only 1/4" deep by 1/4" wide into the drywall. You then lay the cable into the drywall and patch the drywall. Obviously, it would then require repainting.
You didn't say what kind of speaker the RF is and if it's on a stand, floor standing, etc.
We see this sort of layout a lot, but frankly, a TV over a fireplace is usually a terrible idea from a viewing standpoint and the TV is often too high and a literal pain in the neck for anyone seated, unless you're in a recliner. Speaker placement also becomes an issue since the front speakers can rarely be "in line" (at the same height). There are lots of previous threads on that topic if you search this forum for "fireplace neck".