As many others have experienced, I have observed clear improvements as equipment has broken in. Loudspeakers, turntables & CD transports that actually move obviously can change how they sound but electronics have “movement” too, just at a much higher rate of speed. of course tube amps sound noticeably better after they’re warmed up too.
What I’m curious about is this change measurable w/ the right equipment? Will a new amp or other electronics measure differently than one that has 500 hours on it? Of course measurements can only tell part of the story & some things that measure well don’t sound so great as well as the inverse of this too. It seems that with the incredible detail & I guess accuracy that John Atkinson reports on the electronics he tests, there could be a noticeable difference. Does anyone have any experience w/ this??