My husband got a nice set of used 4' tall floor speakers a month ago. They are set up on either side of his desk, and his betta is on it's own shelf on his desk, only a foot from 1 speaker. He likes music like guns'n'roses, techno, rock and such He puts it on kind of loud and his betta seems to love it. He's much more energetic than mine and seems more social when the music is playing. I listen to mostly country music, but my radio is at my mother's rental house that I've been fixing up to change tenants, and I keep forgetting to bring it home. I'll see if there's any difference in how he acts when I put it on.