Hi, there!

Recently, I purchased a pair of tube monoblock, a tube pre-amp, and a
cd-player. I am going to set them in my bedroom and would like to apply
some acoustic foams around the components.

Here is the dimension of the "area":

It is kind of like a "U" shape inside my bedroom, with two sides (45"
width and 96" tall), and the back wall (92" width and 96" tall), the
component rack will be placed about 12" in front of the backwall, with
two monitor speakers (on 24" tall speaker stands) right beside the rack.

Please suggest a good acoustic foam placement. Should I cover all three
sides by acoustic foam or just to a certain height?

Oh, the wall is just normal sheet-rock dry-wall, and the floor is
heavily carpeted.

Let me know if I make the picture clear?

Thanks in advance!

Panzzi