The way I'm building my HT is that all my cabling are going to be run int the soffit and I was thinking what is your thought process on this. Do you run one pipe in all of the soffit? I'm just trying to be ready when it comes to wiring.
Here is the sketch. I would be building the room first only wiring the wiring for the sconce lights and outlet boxes and switch. The rest I will be in the soffit that I'm will be building after I do the room. Thanks
If I was building for myself. Put a LARGE straight conduit down the right side inside the soffit from the equipment rack to somewhere behind the screen wall. All your speaker and sub signal wires can go in that and you can add and subtract in the future. Run a conduit to the projector location. Run the speaker wire for the surrounds inside the soffit tacked to something or in the walls poking through small holes in the drywall which you seal around the wire. If you go the soffit route make sure you will have columns for the speakers to bring the wires down inside.
What kind of conduit? Since the column on the left will be hidding a pole, I don't think I will be putting my speaker in the column. I'm still thinking about the column because I'm just building one column on the left and right. Don't know if I would be able to install my inside the wall speaker in the columns.
There is no rule on the width of columns, design something that is wide enough for the pole and the speaker.
On conduit you can use the gray 2 inch PVC conduit they sell at HD/L if you have turns use the sweeping curves not plumbing curves.
Or you can buy some of the Carlon Resiguard smurf tube conduit, It comes in larges sizes but you need to go to an electrical supplier and it will be more expensive. There are pictures of both conduits in my build threads.
If it was my theater I would return all the plates and just have the conduit dump out into the space behind the rack, either down from the ceiling or out from the wall. Take all the cords and wires directly to the gear and eliminate the connection points for the plates which can corrode over time and degrade the signals.