Leaving my amplifier on ok?

@dweller , that story rings a bell. I have read that too. But it was just that this dealer or reviewer was helping out a widow whose husband had died and was buying the amp from her. The best part was that the amp sounded fine even with the tubes being ON for that long. I believe it was in Stereophile somewhere?

I have  five amps I use every day. There are 4 d amps that I leave on 24/7. Also in use is a single-ended 812 amp, that is in use most of the time (cuz it's so good!)  There is an SET 300B that is used rarely (it makes a good back up when necessary).

Regards,

Dan

@highend64 seems to have already answered his own question.

Anywho, here’s my take. Give the ones that generate heat room to breathe. Chances are all will be well.

Also, I never leave the house with a tube amp on.

@bigtwin 

When we think we are turning off our Hegel’s we are actually turning them to standby and that keeps the Caps charged up. It’s also the reason we don’t have to wait but a few minutes to hear the best sound from our rigs. 
Now something I tried to get an answer from Hegel is, how many watts of Class A does the H390 put out before the class B kicks in. I never got a straight answer.