"Thermal equilibrium after 48 hrs", if the ambient stays the same. And this doesn’t mean it will sound better, it could sound better after 1hr
This means night and day, winter summer will sound different unless you keep your house temp constant.
All this is to much voodoo, you’ll send yourself nutz, just listen to it and say to yourself good enough after 1/2hr of being swtiched on.
Cheers George