Drop a weighted string through the hole.
Cost to run speaker wire through ceiling attic.
Joysts seem to run with air vents transversing the space but if they are open then figure on 3 4 good size holes and 3 days added to the original work to float texture and paint.
Install 1 2 furring strips on the wall around the perimeter of the room.
Is it unsafe to use non shielded speaker wire in the attic.
Poke a reference wire through the ceiling then in the attic find the wire and measure over to find the center of the wall.
I recently bought 200ft of 16 gauge speaker wire.
Attach the cables and pull them up into the attic.
Running surround sound wires using crown moulding.
Just found through a friend of mine that the speaker wires need to be shielded if i plan to run them through attic and also i need a permit.
And use semi rigid.
Fish cables through existing walls with fish tape or a fish stick.
Hole down through the top plate.
Depending on what the wiring is for this may be go through the drywall to the ceiling for instance for new lighting or be farther down on a wall.
Again plan how you want to run your cable.
Running audio video cables behind walls is similar to running electrical cables but a v cables should be at least a foot away from electrical cables to prevent interference.
Pull the wires through the walls.
Terminate the cables in low voltage electrical boxes.
Cut the holes that the wire will pass through to enter and exit the attic.
Depending on what direction your joysts run and whether there is open web trussing when you stick a stud finder on the ceiling i would do anywhere from 500 1200.
If you will need to fish wiring through a wall drill a hole through the wood plate in the attic only.