neiru37I have the Soundlink Mini, which is about the same size (7 inch long). The SLM has 2 speakers which appear to be 1 to 1.5 inches in diameter - smaller than this speaker's drivers, But the SLM has some passive radiators that produce genuine bass. I found that I needed to cut the upper bass a little with the SLM since otherwise it would be too boomy. It will be interesting to find what this Grain Audio sounds like.