What Would Be the Reasoning Behind Leaving Class D Amps On?

mrskeptic what is that suppose to imply? That you're tough to please or everyone on AG has a lack of some type of higher education. A higher education doesn't always equate to wisdom about a subject. Nor do fact that others have obtained in their class rooms always stand the test of time. Science is malleable these days. Just depends where you look and what you chose to educate yourself with.

Me I'll try anything at the neighbors house. I have 2 2" fire hoses I can hook to the hydrant in 2 minutes, FIRES OUT.

Science at work, hydraulics 101.

And be nice, your a newbie. Sure you are.. :-)

A stiff back would be a reason to leave them on.
To replace a yoga class would be a reason to bend over to turn them on.

I'm super curious about this stuff.

Ok then,,, just try it both ways for a month. You’ll get people that swear upon stacks of holy books that it makes a difference. And others that don’t.

(Personally - I doubt it matters)

And they use such little energy that if you left them on all weekend I would not feel guilty about things like the climate… so you could power them off M-Th and leave them on Friday through Sunday… there are no hard-n-fast rules.

The associated components stay fully charged and ready to rumble, just like any other solid state device.  Every solid state piece in my rack stays on unless I am leaving for an extended period of time.

I has a similar question, but for a reason other that audio quality. It is specific to McIntosh: since the front panel is illuminated (even when there is no VU), will keeping it always on risk of burning the front green lights?

@mrskeptic , good point, but there are many here who know a good bit about amp topology, engineering and so on.  

Maybe this site is too subjective for you?  Have you tried AudioScienceReview?  That's a special place over there. $500 Topping amps that measure better than D'Agostino are gospel because of their objective stats. 😏