One of my favorite GIK products is the soffit traps. In particular, for corner traps, really wide coverage in small footprint, and for an apartment dweller, easy to stack a pair in each corner.
If you are attempting deep bass, or have 2 way speakers you want to make sound bigger, highly recommend them.
If you are attempting deep bass, or have 2 way speakers you want to make sound bigger, highly recommend them.