I used some poster-type clay to keep them away from the metal shelf and keep them positioned correctly.
You might also try damping the back wall of the bookcase with some towels or sponges temporarily to see if you have a reflection problem with your rear ports.
My little office speakers from a mini-system were very hard sounding and, after experimenting, I went with some self adhesive felt sheets.
You might also try damping the back wall of the bookcase with some towels or sponges temporarily to see if you have a reflection problem with your rear ports.
My little office speakers from a mini-system were very hard sounding and, after experimenting, I went with some self adhesive felt sheets.