Is it a general rule to burn them in for a few hundred hours? I have found that the handful of CD players (or DAC/Transport combos) I've owned seem to get better, especially in the frequency extremes (more control, less boom or sizzle).
Mark Gurvey of TEAC & Esoteric told me that the DACs take about 400 hours to fully settle in. I've also heard that figure bandied about on other forums and posts. I have no reason to doubt it.
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