Do I NEVER shut it off…?

IME SS amps sound best when left on continuously. I listen to my system at least a few hours daily (usually more) so leave the amp on unless I'm out of town for a few days or we're having thunderstorms in the area.   

I would not leave a big power amp on continuously. 1) They are powerful enough that if something goes wrong it could burn down your house. Unless you put in a tiny fuse, which would defeat the purpose of having a big amp. 2) In today's world there is no excuse for burning up the planet just for a bit of euphoria. If your amp needs to be on all the time it's time to change it, good excuse to go shopping!

@ asiaaudiosoc7 - 

1) Could you please cite examples of amps burning down residential houses.  Provide links for articles specifically noting the cause of the residential fire that destroyed a home was a high end audio amplifier.  

2) There's no need for excuses for leaving the amp on if it improves sound quality.  That's the entire point of having better equipment.    

My Herron M1 amps have been on for years.  I only turn them off if I'm going on holiday for more than a week or if we're having electrical work performed on our home.

&terry9  Obviously, you've not heard of Kart Koozies.....

Easy on, easy off; 2 versions, battery and USB powered....

...quite the rage...if you can't stand the idea of a cold stylus.....;)

Yes and yes. People have the perception that heat is the enemy of electronics. They are only partially correct. The enemy of electronics is the heating and cooling cycles. This creates the expansion snd contraction of electronic components that will creat micro cracks and eventually lead to failure. Quality manufactures use components that are made for their heat ratings. I am running an old sansui 7070 in my wife's business. Other than power outings it has not been shut off for 26 years. I run class A mono blocks and yes they get very warm. When I am done listening I put a box fan on them. Don’t feed into the so called “green” crowd. Each on of my amps running all year costs less than their idle Prius charger hanging on the wall costs them for one month.