@hide45 Regarding the ceiling, I agree one could leave it open. Might consider incorporating bass traps where ceiling meets walls. Maybe insulate some sections and cover with fabric as per MCs suggestion. Also spray a thin layer of closed cell foam insulation to round out edges where joists meet subfloor above. Basically having diffusion and some absorption installed into ceiling. Allowing for the 9' ratio reference.
I would mount TV flush to wall behind speakers. Maybe elevate it above speaker height. Cover with absorption products when not in use. Might frame it in for this purpose.
If video electronics are not in use when music system is used then one dedicated line could be used for both. In your case the position of the dedicated outlets will need to be well thought out regarding topology of A/V systems.
Just some thoughts, I am enjoying thinking on your project.
I would mount TV flush to wall behind speakers. Maybe elevate it above speaker height. Cover with absorption products when not in use. Might frame it in for this purpose.
If video electronics are not in use when music system is used then one dedicated line could be used for both. In your case the position of the dedicated outlets will need to be well thought out regarding topology of A/V systems.
Just some thoughts, I am enjoying thinking on your project.