There is what’s right practical and then there is what’s right to keep the the itsie bitsie brain worms from eating away at your pleasure center. My advice based on you OP is leave it on. Excessive heat is what kills electronics soooo. add cooling fans as needed to the hot parts as needed. Usb powered lap top coolers work great! Get a "Watt Power Meter Plug Home Electrical Usage Monitor" to see how much juice your amp uses over night (Less that $15 on amazon). This will kill that brain worm. Benefit will be you now will have an on/off switch that will last forever (a whole other topic of conjecture) .
Enjoy the music and as Van the Man says - "turn it up, little bit higher radio
Turn it up, that’s enough, so you know it’s got soul
Radio, radio turn it up, hmm La, la, la, la, la, la, la ...........
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My Pass Labs XA-60.8 mono blocks are class A and leaving them on would bankrupt me :). But they have a standby mode. They warm up fully after about 30 minutes. Like others have stated, it’s amp specific. If you change to another amp, consider one with a standby mode.
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I have been leaving my refurbished Audible Illusions preamp on to eliminate constant cycling on and off supposedly to extend tube life. The pre stays barely warm to the touch. Sounds great. Solid state amp on and off per use.
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SS Always on.
Tubes off. I don’t mind waiting for them to warm up.
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Considering that the most common mode of failure in an electronic component is thermal fatigue from power cycles, I leave my system on most of the time. I turn it off for thunderstorms and if I will be away from home for an extended period of more than a couple of days.
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