The underfloor heating pipes are installed: approx. 420 metres of 16mm PEX-Al-PEX pipe in 6 loops and 3 zones (theatre, bar, bathroom). The steel grid over them is not for suspended floor, the channels will be embedded in the floor screed to take LED strips (with diffuser strips over).
The ceiling and walls have this construction as well; there will be 8.1 kW of installed LED lighting in total. Of course, I would expect it to be dimmed down most of the time.
Power needs are met by a dedicated supply of 415 volt, 3 phase, 300 amps. Because 120v or even 240v just doesn't cut it.
There are industrial surge protectors at the main panel before the isolation transformer, power filtering will be after the isolation transformer and sub-distribution.
The Magnepan (magnetoplanar flat pannels) surround and ceiling speakers are installed: 4 x 1.7i in the walls and 4 x MMGi in the ceiling. The ceiling build up is 4mm fibre cement board, 50mm rigid foam insulation, 6mm fibre cement board, 100mm 'quiet' mineral wool, 100mm air gap. The side walls are 12mm fibre cement board, 50mm convoluted acoustic foam, 150mm plenum, 50mm convoluted foam, steel clad R/C outer wall. Floor is 250mm reinforced concrete slab, about 40mm liquid screed, 75mm rigid foam insulation, 70mm dry cement screed. All surfaces will get 3mm black rubber tiles later.
The shallow depth of the air spaces behind the Magnepans is definitely not ideal, but I didn't have any more room available, should be ok for surround channels. Sounds a bit weird ATM due to all the reflectors, but pretty cool with all channels on (the usual Magnepan super wide soundfield x 4). I've also built the shelves to hold the LR electrostatic speakers: concrete blocks and reinforced concrete shelves (small gauge rebar).