I always turn the unit off after using it, so the switch gets used.

Standby power consumption is less than 0.5W, and it is not necessary to turn off the Azur 851A through the rocker switch on the back.

The unit stays pretty warm (almost hot) if the rocker switch isn’t turned off.  Is that normal?

Sometimes the unit sits for several days, up to and including a week not being used.  

I have a 651A integrated and it remains cold when not powered and the rear panel switch is on.  So, I think you have a problem.

@cs9314 

You can plug the 851A to a kill-a-watt and see if the standby consumption is less than 0.5 watt.