My VAC gear sounds decent after 5 minutes, but incrementally improves over the next 2 hours. I warm everything up at once and play LP's that I don't totally engage me or are a new purchase at lower levels for several sides. The other question is: once warmed up, does it take the same amount of warm up time after it's turned off and restarted to sound superb, or is there residual heat that remains. Thinking of the scenario of going out to dinner (I never leave my gear on when I'm not home) and then once home again firing the system up again. I would think that one would "get credit" for earlier play time.