Lingo on or off?

Does anyone have opinions on whether the Lingo power supply should be left switched on or off? My dealer told me to turn it on about half an hour before listening but I leave all my other components powered up so why not the Lingo.
It will sound better if it is left on, certainly better after 24 hours. You should also compare yourself, a fun and easy thing to do
I never turn mine off. Been on for years.