Most modern designs are going to have a standby mode where the component consumes very little power. Usually .5 watts or less. It’s pretty apparent that they are intended to be in standby mode when not in use. I noticed even holdouts like Naim have finally embraced energy conservation and have this feature in the new classic line and statement amps.
Older designs without a standby mode I can’t really say. I have owned amps that consume 20 watts or more at idle. That can add up over time so personally I turn my stuff off. But I’ve never owned a mega expensive amp, so my experience may not be applicable. In this industry there are many specious ideas that are spread around, shared and reinforced. Stay skeptical. If you’ve got a really expensive amp, and want it to last decades, try calling a service center to get opinion.
Leaving my amplifier on ok?
Would it be ok to leave my amplifier on all the time if I want to extend the reliability of the amp? Many amplifiers ar Class A, high current bias and tubes might be a problem if energy consumption is a factor. Not to mention Excessive heat from bias operation. Is it possible to extend the life of the amp with leaving it on all the time?