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More than one issue, here.

198.164.200.214

It does seem to me that the alleged phenomenon would not be the same with the different sorts of equipment. So, instead of one issue, there are really a number of separate issues. In other words, taking a position on one does not entail taking the same position on others.

I can see that speakers may show a measureable difference, especially the woofers, with some break-in time, which might be audible under some circumstances. My dealer believes in this, but I have not noticed any difference in his broken in and unbroken in speakers.

When it gets to interconnects and cables, well it is an alternating current signal, after all. I haven't seen anyone come up with a reliable, repeatable test to show that cable burn-in is real and audible.

CDPs and amplifiers? Well, I can assure you that my CDP and amplifier sound the same warm or cold, and so did their predecessors. So did virtually every other SS amplifier I have ever heard.

I did meet one SS amplifier that needed warm up for a few minutes, an old used Mission 60 watt power amplifier with 'Mission' sculptured on the cover in front--don't know the model no. This on consignment amplifier happened to be the most robust one in store during the slow season, and I wanted to listen to the Mirage 3si. This thing did not even have a stable stereo image until it has warmed up for a few minutes: wierd! My dealer remarked that this is a peculiarity of that particular model. It worked fine after after a few minutes.

I don't do tubes, but I understand they take a little warm up. Another good reason for me not to bother with tubes.

As just about everyone knows, their systems sound different to them at different times. There have been a couple of threads on this within living memory, and that was the constant theme of the replies. Yet, few seem to think this has any implications for auditioning equipment, and making judgments about alleged effects like burn-in.

So, without more objective proof, the most probable explanation is that most of it is in the mind. So, yes, burn-in exists, but mostly in the mind.
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