Is it the beer or do speakers/electronics really need some extended warm-up period?

no need to recall a sound quality for days or weeks

simple to test with 2 identical units - one can be 'burned in' and the other not

have a friend swap them a few times and don't peek

If they need such a warm up, they are a truly bad design.

Wow, I did not know that. 😳

Thanks Doug, I can't believe I wasted time and money via my electric bill, because I delusionally imagined my Bryston amp sounded better after being on for 24 hours or so. Over and over I imagined this. If only this thread had appeared years ago. I could have saved a few bucks. My new Class A Luxman seems to take only about 30 minutes to come fully into song. 

Hey, my amp just caught fire and exploded! Gosh, it must have been thermally unstable. Rats! 🐀 🐀 🐀