I have a similar concern. I use my Aesthetix pre-amp standby function when I am not listen to music. In fact, I hardly turn off the unit completely. I leave it "Standby" day and night; unless I am out of town for days. I have used the tubes (6922 and 12AX7W) in this manner for over 3 years; they sound fine (I think?).
Now, what's your recommendation for the proper use if the unit has the "standby" function? And what's the life expectancy on those tubes with proper use?
Now, what's your recommendation for the proper use if the unit has the "standby" function? And what's the life expectancy on those tubes with proper use?