Cytuję z linku Gustawa:
>>No evidence in support of the existence of the break-in effect was found in this test. The changes observed were either too small to be audible, or very large and not repeatable, which suggests fluctuations in system performance or environmental noise. Also, no pattern was observed in any of the changes over time, ruling out a cumulative or long term effect due to burn-in. The music clips recorded as part of the test also sounded nearly identical in a subjective listening evaluation. It is therefore concluded that breaking-in headphones for consumers is not necessary, and won't result in any noticeable change in their sound.<<