He aqui una cita de Internet:

"I would imagine the effects of heat and time would be well documented in respect of the electronic components used in let us say an amplifier - and the designer is aware of this at the design stage, and thus the piece of equipment is made to perform best at a certain temperature and after a certain amount of heat cycles. That is most likely the reason for IMPROVEMENT after burn/break in.


Well, since you seem to be someone who accepts the word of those who are professionally involved with a given industry, as you are with your gaskets, let me tell you something that I've picked up from my ~20 years in the electronics business.

Yes, the effects of heat and time are well documented in the case of electronic components - and basically, there isn't a damned thing out there that gets better with age. No one designs circuits such that they'll "perform best...after a certain amount of heat cycles". There's simply no way to DO this. Component values DO change somewhat with temperature, but you do NOT design consumer electronics gear such that everything has to be expected to come together at a given temperature or age. You design circuits so they'll work within spec over the entire range of expected component behaviors; circuits are designed to be tolerant of variations, including variations with temperature, age, or (sometimes most importantly) just from one part to another within a production run. (It's pretty easy to find resistors matched within 1%, but, just f'rinstance, it's damned
near impossible to find tubes or transistors that have such tight tolerances on THEIR specs.)

There's not an electrical engineer worth his salt ANYWHERE who would consciously TRY to make a design somehow "fix itself" N hours into its lifetime. You design it such that it behaves properly no matter WHAT the components do, within their expected variations. The only exceptions to this are very specialized applications, and for those you normally have to have an engineer along to babysit the product every step of the way.

Now, does this mean that nothing audibly changes with warm-up? Of course not; we DO design things, or more typically ADJUST them, such that they're working correctly after thermal stabilization. That IS, after all, where your product is going to spend most of its life. But it doesn't take THAT long to warm up (to reach thermal equilibrium), and that doesn't have ANYTHING to do with the notion of "break in".

Oh, and is it common for manufacturers to "burn in" products? Yes, but THAT is to improve RELIABILITY, not performance. Grab a copy of any decent quality assurance handbook, and look up the terms "infant mortality" and "bathtub curve". All a burn-in is trying to do is to keep too many of those products from being shipped back to you; it's cheaper to catch the early failures in the factory. Seems to annoy the customers less, for that matter...:-) "

A la vista de esto, ¿el rodaje es de los aparatos o de nuestros oidos respecto de los aparatos, o ambos?

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