Bass is hard to handle acoustically, and the depth of this absorber isnt anywhere near thick enough to dampen the deepest bass to counter act room modes at 20-40hz and above. BUT that does not mean that you shouldn't try. I have placed 4 of this in the roof in the back of my home cinema and another 4 in a niche in the room. It's actually very effective.
This is a very large absorber, make no misstake about that. Its 60cm long and 35cm on the edges, which makes the front width about 45cm.
This absorber looks very good. I whish I could put some pictures on my review.