Hi, i have been reading this really helpful forum since a while now, but this is my first post here I am (was) a proud owner of a new Audio GD R2R-2 DAC, bought in February 2018. It has played music flawlessly for 2 months when it decides to stop producing sound, no matter the inputs used (usb, toslink, etc) or cables. Power was well going through the unit, but no sound coming out. I was really disappointed to have my unit broken because the sound was lovely to my taste, a perfect DAC paired with my HE-560 headphones and MZ2 Linear Tube Audio amp. After writing to Kingwa, he told me to sent back to unit to him. Shipping took 3 weeks, and Audio GD has received it a few days ago. I wrote to him but still have no news. Does any of you had to return a product to Audio GD in China ? How long it took before you had your unit repaired and sent back to you ? I'm asking because not having my dac prevents me of enjoying nice listening sessions i used to have, and i can't wait to have those back. Thanks for you help.