Leaving tube amps on.

This isn’t exactly applicable to your question, and what I do might not fit into the structure of your life, but I generally know, on any given day, when I will be listening, and it usually after I eat dinner. So a couple or three hours before I am going to start preparing my food I turn on my CDP and the power supply section of my pre. about an hour later I turn on the rest of my pre (which lights the tubes up) and then after a few minutes or so I turn on the big power caps of my amp and then when I start making dinner I turn on the rest of the amp which lights up the tubes and when I start eating I put on some background music at a real low level.

By the time I have finished eating and cleaned up my mess my amp is pretty hot and I tell myself that sound degradation is going to be minimal. (I don’t know if it is minimal, but I tell myself so anyway.)

I definitely wouldn’t leave my tube amp on all day or overnight on purpose. Not that it has never happened before. But if you can get it on an hour or so before you start listening, that may make it sound better when you do start listening.

Leave ARC 750’s on 24 hours a day? 36 power tubes total? I find it inexplicable that anyone would even consider such a foolish thing! No offense intended.

ARC power amps are well known to self destruct when even a single power tube blows (ARC doesn't "believe" in fusing tubes). 36 of them? That’s living dangerously.

@bdp24  Who said anything about leaving ARC 750s on 24/7 ? If u are referring to my OP please reread it. 

@immatthewj  I generally warm up my equipment about 15 - 20 min. Then I will listen at about 15db for about 15 min before going up to my usual 28db listening level. But to tell ya the truth the amps sound dam good even from a cold start for listening. 

Ah, okay @tattooedtrackman, I see the difference. Not 24hrs/day, but all day in anticipation of listening that night.

Still, I would not want to leave the 750’s on without someone in the room they are in. That is generally true of all tube amps, none moreso than those of ARC. And with the short life expectancy of tubes in ARC amps I would not want to put non-listening hours on them. The cost of maintaining ARC amps employing 36 power tubes is a daunting proposition!

I never had problems with my ARC power amps, but my dealer (Brooks Berdan) had shelves full of used ARC power amps, many with scorched circuit boards.