Four Hour Tube Amp Warm-Up

@bigtwin Heed Audio, Simaudio, Pass Labs, SPL, AVA, just to name a few. 

bigtwin wrote: "I'm not aware any any manufacturer that suggests leaving equipment powered up 24/7?  I would think you are only shortening the eventual life span of things doing this?  Just asking."

@jerryg123 Thanks.  I stand corrected.  My manufacturers, Hegel, Esoteric, Triode Audio Japan, PrimaLuna, all recomend turning equipment off when not in use.  Oh well, whatever works for you is all that counts.  Merry Christmas.  

@bigtwin I cannot think of a single Tube Amplifier manufacturer that would say leave it powered on. Nor a Hybrid tube SS manufacturer.  

It’s difficult to really know for sure because I’ve not listened to the same music at 30 minutes, 1 hour, 2 hours etc. It’s also difficult to remember & accurately compare w/ that time lapse in between. I don’t think our sonic memory is that good over time, even relatively short amounts. 
 

“Warm up” time could also be be within in our brains & it takes me time to relax, unwind & really get into the music & really enjoy it.

That all said, I have noticed w my Rogers EFH 200 Mark II ( 2- KT 150’s per side & a seriously large power transformer) that the sound definitely sounds more full body & fleshed out after about 1 hour. Beyond that , I can’t say much. 

My 300B SET amplifier also sounds it best after 3-4 warm-up hours. After 1.5-2 hours it sounds not bad but not as magical smooth and clear as after 3-4 hours. 

When I had transistor amplifier Plinius 8200 integrated it was always on. Without couple of days warm-up the sound was hard to listen to.