Having the Sassons speakers here convinced me I need room treatment.
I found a source online for Sonex that is reasonable.
My question is this. Could I staple the foam to the wall rather than glue? I figure that way, if I ever change rooms, I won't ruin both the foam and the wall, and I can move things around to find the best spot for the panels.
I don't see why it would matter, but thought I'd ask.
BTW: my goal is to kill 'slap echo'.