Hi Gerard,
Caelin has been very busy with work and design, but I'd be pleased to help. We own Constellation electronics and use them along with a few other brands for testing, so we know your system well. I would try an Alpha HC on your DAC initially, then pre-amp. Both applications should bring a noticeable improvement. Break-in requires 4-5 days of patience and yes, the sound does change for the worse in different ways on days 2,3 and 4, improving and stabilizing usually on day 5.
I hope this is of some help.
Regards,
Grant
Shunyata Research
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