OK. I am from Thailand. I have experienced problems with the AQVOX MIC 2 A/D for two occasions around two years ago. First, the defect came from its power supply. The AQVOX company from Germany sent me a new power supply one for replacement then it worked fine for another one or two months. The second flaw due to internal component failure. I asked replacement of the power supply again but it didn't work. I had to sent all back to the company for fixing that took around two monthes before it came back now and still works fine without problem. I have a DAC USB MK2 which I bought before the A/D around 6 months. The DAC works fine unitil now without any flaws. Contact a service guy there in Germany at www.aqvox.de, he could help fixing the problem.