You want to strike a balance between an appropriate place to put your speaker for your home theater sound and a location where there are no wires plumbing or joists behind the drywall.
In ceiling speakers and insulation.
You can use window screen mesh or use a piece of batting style insulation as a way to hold the insulation back without inhibiting the proper air flow.
We recommend using the same amount of insulation for every speaker location.
If one location is packed full and a second location in the same room has very little insulation then the difference in bass response will be.
2 are about 4 feet in front the screen and the other 2 are right behind the main sitting area.
I have 4 ceiling speakers.
In wall and in ceiling speakers are the ideal solution for this by which you can have speakers and wiring hidden inside the walls.
Ways to keep insulation and in ceiling speakers from touching before beginning any of these methods you will need to place your speaker.
The width of the insulation is usually pre cut so you only need to cut it to length and insert it in the opening behind the speakers.
They will fit a much larger speaker than my 9 speakers so they are rather universal.
These worked well enough to protect the in ceiling speakers that we installed in our media room.
However in wall and in ceiling speakers have certain inherent disadvantages the first being the loss of sound quality.
Consider installing some insulation r 13 in the wall cavity behind the speakers to improve sound quality.
Connect speaker wires to amplifier or receiver and test for sound.