The Metrum Octave is superior to Ack Dac2 or Promitheus (not tube). I tried these also with an Audiophilleo2, but they are no match. Sound constricted and muddy in comparision. I would strongly recommend the addition of a reclocking device, such as Audiophilleo (needs an USB input however). Maybe rather choose the Metrum Quatrum to stay under 1k.
No, I do not know Promitheus tubed. With the same topology of the digital circuitry, I doubt it can match a Metrum. The state of the Promitheus company is not clear. People have been bitterly complaining about lack of response.
have you heard the minimax ? based on the reviews, I don't think that It will be that great for me. The ess9018 Is said to be bright in the treble. as I mostly listen through headphones I wonder if that brightness could lead to harshness...
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