Best material for control room wall

[GIK Acoustics]

The cheapest way to add some mass to the wall is by using multiple layers of drywall. Green Glue can be used to provide a little extra isolation via constrained layer dampening. Make sure the partition is insulated also. Regular fluffy insulation works great. Make sure all cavities are sealed well.

[avare]

Where on earth are you? In different parts of the world different suitable materials are cheaper. Concrete block and drywall are popular depending on local price.

Andre