Had a few moments to do an update...
Slim backer boxes being made with an 18mm ply frame with a 12.5mm fireline plasterboard back and sides, with a couple of strips of Tecsound just to try and dampen it a little. A couple of strips of RW3 will be laid across the back of it too. The clearance isn't great, though the whole room will sag a couple of mm once the board goes on
These are only 47mm deep internal which with the ceiling makeup will be >just< enough to take the DT ceiling speakers. Internal dims 400x390x47mm.
Locations put up for up to 4x Ceiling speakers, but we're initially going with 2. Also an 18mm ply plate to give something for the projector mount to attach to.
Plasterboard ready to start going up on the walls tomorrow. This isn't all of it. 2x15mm to side walls with TS50 in between layers, 2x12.5mm to the ceiling with TS50 between layers, plus an additional layer at the back of the room for a lighting channel. The front of the room will have a fabric panel above the screen.
Lighting wise,
@MultiroomMedia has come up with something really neat, a plastered-in lighting channel which takes a strip of RGB LED tape. We're having a strip of this down each side of the room in the ceiling, pointing at the wall. It has a reflector that directs some light down and some to the walls, which should give a nice diffuse light in the room without any glaring spotlights (or holes to try and fix in the ceiling).
Some piccies of the light channel jury-rigged up with just some black cloth hanging down. The purple square in one of the pics is the actual colour we're going for at the back 2/3 of the room, with the front 1/3 going black.
In other news Building Control came out for the first time and were quite happy it seems. Only two things they raised were:
- fire alarm - they want some way for people in the room to know there is a fire, given the soundproofing etc
- fresh air - which they were quite happy to be in the form of a background ventilator setup (ie passive with no fan).
Neither of these seem too onerous and are both sensible suggestions.