Why No Power Button on Some Phono Stages?


I am upgrading my phono stage, and several of the ones I have shortlisted do not have a power switch/on-off button.

Why is this? Is the user supposed to keep it powered up all the time, or manually unplug the power each time?

I know certain electronics are supposed to have better sound once they have reached thermal equilibrium, but that doesn't mean I want to keep it powered up 24/7.

Switching the phono stage power off from the power strip is a PIA, as it would switch all of my other components off, and I'd lose by tuner settings.

I want to choose the phono stage by sound quality, but an on/off switch is a major convenience factor for me. Why do some manufacturers leave it off?
kixo
My tube preamps are on permanently. No issues. Every now and then I turn them off for a day or 2 to discharge the power supply caps and ensure there is no behavioural memory imprinted into the power supply caps.
I turn my doorbell off when I leave the house. It doesn't seem to have any effect on the sound.
"While I do agree that it's optimal to listen to components when they are at operating temperature, I would like the option of turning off a device easily when I choose to..."

Plan on several days for optimal sound with solid state devices.
Several days? That's just silly...turn off everything when you're not around, or at least never admit that you leave things on, as these days that's simply lame. Really.