Sub-Woofers how to power down

I agree with both of the above replies... leaving a self powered sub on all the time is completely fine. Both my REL Stadiums have been, [aside from a few severe storms or hurricanes when turned off for precautionary reasons only], left on for the past 10+ years and have been trouble free and perfectly performing. FWIW my entire predominantly tube based system does too... Not only does it sound better but it saves each component from those relatively gruelling turn on procedures.. that is pressing the power switch, yikes!!!! (No, I'm NOT being facetious).

I turn everything else off because it gives me the right to self righteously declare others who don't to be Destroyers of the Earth.

I know how u feel "Destroyers of the Earth" is a tough nameplate to carry so I am always compensating for my hi fi indiscretions by being especially conscientious in most other aspects of my relationship with Mother Earth...