After 49 emails exchanged with Audio GD about a R1 dac, they asked me to send it back at my expense for a refund.
Idid, mentioning what I had paid for it. The Chinese customs wnated to apply import duties based on that amount.
Audio GD sais they told me to lie and put a low 100 $ value. They did not tell me that and refused to pay or clear the matter with Chinese customs, who eventually forcibly destroyed the unit. Netither DHL or Paypal assumed any responsability.
Audio GD has some nice products, but no business ethics.
The DENAFRIPS Pontus I now use is detailed and not fatiguing. Much more open than the Audio GD. R2R generally don't have this ringing that I hear on oversampling DACs.