A review was just published in France:
Maestro 4 - Vinyle&Audio (note: this is a really raw, basic translation of the original French review).
"The Maestro 4 seems to us to combine all the qualities that we have been able to celebrate in other DACs. It's simple, it will be from now on our reference DAC to carry out our tests. It's an absolute favorite, this Maestro has never been so well named."
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