Plinius said leave my Class AB integrated on all the time. Their newer ones have the power switch on the back panel. My phono stage doesn't even have a power switch (Sutherland Insight LPS) - if it's plugged in, it's on(unless your power conditioner if unplugged or off).
Leave it on?
I just listened to Paul McGowan explain that turning SS equipment on and off degrades the capacitors from the tiny power surge and that leaving SS equipment on ALL THE TIME is best. What do you do?