Leaving my amplifier on ok?

There isn’t a electronic component that has its life extended by being on all of the time.  Amps, in particular, have a shorter life from being left on because of hear.  Tube gear should not be left on because there is a limited life to all tubes and that life is primarily determine by how long the cathode of the tube has to emit electrons.  The only reason to leave something on is to reduce warmup time.

I run Hegel amps and wondered the same thing after reading so many different opinions.  Questioned Hegel directly and was told to turn the amps off when not in use.  They said leaving them on only shortens the life of electrical equipment.  I listen to music every evening and turn the system on about two hours in advance.  

Use "search discussions" above, where topic has been discussed, at length.

For solid state amps: best to leave "on", all the time, if you listen frequently. This reduces "thermal cycling" of the circuit board. 

@pmm +1! If Class AB they can run 24/7. Power supply caps will stay warm and nicely formed. Class A amps that run hot should be turned off when unused.

Heat kills.  No for class A amps.