THe best way to do it is to use The Richard Grays Substation stepdown 240/120 V.
You could achieve isolation and at the same time not restricting dynamics.{the Isolation transformer should be able to handle the peak power of the amp ,which is typically 10-15x the rated power]
Alternatively,you could send to the Bryston factory to get them to convert permenantly
You could achieve isolation and at the same time not restricting dynamics.{the Isolation transformer should be able to handle the peak power of the amp ,which is typically 10-15x the rated power]
Alternatively,you could send to the Bryston factory to get them to convert permenantly