I think a lot depends on your unit. Some take longer to warm up than others, also some are a little more "blunt" with how they power up. If Telefunken 12ax7s last 10,000 hours, you do the math....
I tend to leave my system on all weekend if I'm listening a lot. But, if I'm not going to listen for a day or two, it gets turned off.
I tend to leave my system on all weekend if I'm listening a lot. But, if I'm not going to listen for a day or two, it gets turned off.