It depends on preamp design as stated above but Audible Illusion tube preamps have their tubes lit even after the power button is off. According to Audible Illusions this lenghthens the life of the tubes.
Is it a OK to leave tube pre-amps powede up 24/7
I’m relatively new to tubes in my hifi setup. Recently went from SS pre to tube ARC pre-amp and a Croft phono stage.
I have always kept all of my SS gear powered up 24/7(and still do), but I shut down my pre-amp and phono stage now after I am done listening for the day. I power them up at least a half of an hour before I put anything into play.
I would prefer to leave my tube gear on all the time, but am concerned about premature tube wear.
What would the tube folk here think about 24/7?