If you can "mute" the preamp when it's not in use you can extend the tube life even more. The tubes in my preamps have lasted at least 2 years( an average)
How long do tubes in preamp last.......
I am thinking about a tubed preamp. Unfortunately my wife will have access to the system. She has never turned off a light and opens the windows in the winter instead of turning down the furnace. I cannot expect her to turn off the sound system. I know a pre's tubes last longer than an amps, but what are the ups and downs of leaving the pre on for long periods of time? thanks......