The BMS10A from Yamaha is an adapter that allows you to mount loudspeakers weighing up to 11 pounds to a standard microphone stand. The mount conforms to the 5/8″ threading standard and comes with a 3/8″-16 European threading adapter. In addition to loudspeakers, the adapter can also support MG10/2, MG8/2FX, and STAGEPAS 300 or 500 mixers.