I’ve just got one of the MINIRIG Minis and it sounds great on the iPod. Yet to be tested with Norns or the Plumbutter.
My friend, the amazing and beautiful Sean Julian, uses one with his Easel:
He picked his up after noting that Anthony Childs also used on his record Electronic Recordings from Maui Jungle Vol. 1, which AC confirmed himself on Muffwiggler (‘ I used a minirig speaker, though not the bluetooth version that they now sell. Amazing how much bass it produces when resonation with the hut too.’)