In building, one of the factors that will influence your enjoyment of the room is the sound isolation you build into it -- assuming there is noise in adjacent areas. That was mentioned by others, with possible solutions. I’ll add a +1 to that. People talk about "noise floor" dropping after adding some gizmo that others can’t hear, but every dB of HVAC or traffic noise you keep out of the room is a REAL improvement.
I used solid-core wood doors with weatherstripping, then added seals from this company: https://www.soundproofingcompany.com/
The other side of the coin is that a room that is soundproofed will retain bass, so have strong peaks and nodes. Be prepared to add plenty of bass trapping and spend time positioning speakers and subs. Consider using multiple subwoofers and/or DSP in the deep bass.
Yes, install many outlets, with acoustic putty pads around the boxes so they don’t let noise through. As few wall penetrations as possible. I’d recommend skipping ceiling lighting, and use floor lamps.
Consider what to do about the HVAC. Can you run an oversized vent to minimize whooshing noise? If your system is noisy, would you be better with a "dead vent" not connected to the main system?
If you have a choice, face away from the windows. It is more relaxing. If not, and there is glare, you can have them tinted.
If you live in a damp climate, make sure you are taking adequate care about water vapor (and possibly water) that might seep through the concrete. Basement floors are a specialty. After some trouble, I wound up using needle-punched (synthetic felt) pad with synthetic carpet over it, which lets water vapor pass from the slab into the room air. In wet months, I run a dehumidifier.
Have the door to the room open OUT, in case the best listening position happens to be near the door. Shouldn’t happen with 27 ft length, but still....
I hope you wind up with a great room!
I used solid-core wood doors with weatherstripping, then added seals from this company: https://www.soundproofingcompany.com/
The other side of the coin is that a room that is soundproofed will retain bass, so have strong peaks and nodes. Be prepared to add plenty of bass trapping and spend time positioning speakers and subs. Consider using multiple subwoofers and/or DSP in the deep bass.
Yes, install many outlets, with acoustic putty pads around the boxes so they don’t let noise through. As few wall penetrations as possible. I’d recommend skipping ceiling lighting, and use floor lamps.
Consider what to do about the HVAC. Can you run an oversized vent to minimize whooshing noise? If your system is noisy, would you be better with a "dead vent" not connected to the main system?
If you have a choice, face away from the windows. It is more relaxing. If not, and there is glare, you can have them tinted.
If you live in a damp climate, make sure you are taking adequate care about water vapor (and possibly water) that might seep through the concrete. Basement floors are a specialty. After some trouble, I wound up using needle-punched (synthetic felt) pad with synthetic carpet over it, which lets water vapor pass from the slab into the room air. In wet months, I run a dehumidifier.
Have the door to the room open OUT, in case the best listening position happens to be near the door. Shouldn’t happen with 27 ft length, but still....
I hope you wind up with a great room!