Leave it on?

Think the answer for tube equipment is to turn off I have two Pass Lab amps I leave on almost all the time. Also heats the room in the winter.

My cello preamp has no switch, it’s just on if it’s plugged in.

@au_lait ”My cello preamp has no switch”

In the UK we have switches on our 13amp sockets as a British Electrical Standard, so it’s not a problem isolating your preamp if over here. I know the US has 110v with normally no switches at the plug for on and off. It sounds a little bit crazy to us Brits if we buy equipment with no on/off switch to not be able to isolate the unit without pulling a plug from the wall.

l know it’s completely safe to just push in and pull out a 110v plug and that is not part of the discussion. I am talking about pure convenience and the options for gear with no on/off. I think that gear made for the American market should logically, and for ease of use, be manufactured with on/off switches.

I have a Butler TDB2250 power amp. When I sent it in for some repairs I talked to B.K. Butler the owner and designer. He told me that leaving the power on was just fine. My amp doesn't have a standby mode. If it did I would use it. 

@russwill “My amplifier does not have a standby mode. If it did l would use it”

Obviously my last post is irrelevant if equipment is plugged in and left on forever, but as you say, having more user options are plus points.