The right backbox protects your speaker and provides reliable support.
Ceiling speaker insulation box.
Something like mdf and gwb to make the shell in between joists and under the upper floor.
Maybe build out a soffit in the room for the speakers and maybe some recessed lighting.
These types of speakers are designed with american homes in mind.
The back of an in wall or in ceiling speaker which goes into the wall is not shielded or covered.
Your backer box should not be more than 3 inches deep for in wall speakers and 5 inches for in ceiling speakers.
These devices can be built out of many different materials including plastic and wood.
It is also the best option for keeping your home insulated while maintaining your sound quality as you can put insulation over the top of the speaker box.
A speaker box is the only option you have when it comes to blown in insulation.
The first option is to build backer boxes for your speakers.
To construct a speaker box get some plywood and a few lengths of 2 x 8 lumber this assumes your speaker is shallower than six inches.
Inwall speakers and inceiling speakers typically do not need to have boxes built or spaces constricted.
You simply cut a hole in the box to match your speaker and a small slice for the speaker wire to feed through roll the box up and shove it through the speaker hole adjust the placement of the box until it s just right shove the absorption panels through the hole and push them into place and then seal the boxes to the drywall with a thick line of caulk.
You will need to create an airtight enclosure so that you can contain the sound within the room itself.
This causes transmission of sound through the exterior wall into the other room.