Warm Up Time Tube Phono Preamplifiers


New to tubes, wondering about warm up time for new Project Phono DS Box and after listening is it wise to turn off? I leave all solid state gear, amplifiers, sources on or at least in standby.

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Don't forget that tubes also have a break-in period before they sound their best.

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Also pretty new to having some tubes and now have a tube preamp.  I agree that it sounds its best after about 20-30 minutes.
Really enjoying, definitely noticing a difference from straight solid stste. Last night enjoyed some Lee Morgan and Bill Evans. Am interested in the variety of tubes available and the differences that other members mention. Curious and look forward to picking some up and checking out.