I have been the last week. I have also used 9v for a longer period with good results. Could be my imagination but for music with more pace, 12v feels more dynamic. To be honest, it lasts that long I’ve just left it on 12v… unless I really need to eek it out.
You’ll have to update us as to how you get on with it. Someday I’ll probably get a pair of wave cables to see how they compare… but for now I’ve just been playing and enjoying the system as is! From your report it should be good!
Just to add. Rob Watts said the MScaler converts the power to 5v so the difference between 9&12 could all be in the mind!