I have always turned my system off after every listening session. It seemed that the sound would improve after 20 to 30 minutes. I was told it was not my imagination. In a smaller forum, there was a two person concensus that you should leave your electronics on 24/7. My vandersteen subs dont have on off switch so they are always on. Front end: Carver pre, Hca-2 and a Music Hall 25 mod.
I turn everything off for some of the reasons Nsgarch states plus my system warms up in about 30 minutes to the point where I can no longer hear a difference.
My last solid state equipment lasted 20 years before I grew tired of it and needed to upgrade. I turned it off after every listening session and it never failed once because of thermal cycling.
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