Calyx M was reviewed in german Audio magazine for July 2014. Scored 107 points, same as A&K AK120 II. For reference, AK240 got 110 points on March 2014 issue, AK 120 got 105 points on June 2013 issue.
Pros: unique and crystal clear playable sound as player and USB DAC, over headphones and line out. Logic, foolproof operation.
Cons: relatively power hungry (4-5h battery life).
Got an award for "dynamic sound".
Outstading measurements shows linear and extended frequency response. Distortion and noise are in Reference levels: SNR of 116dB. Output voltage is 1.25V. Thanks to an output impedance of 1.8 ohm it is perfect for mobile phones. Jitter of 150ps is very thin.
Is there a link to this online please? (German language is no problem; I have friends...)