Just to share a few years later. I totally forgot about this until I checked my history but I purchased one of these years ago and the unit I received was defective, didn't work at all. Had to dig through the dumpster for the packaging to send it back to AE. I received a second unit from them, work a week then stopped working all together again. I finally just gave up because I was tired of having to beg for a working unit and them making me feel like it was my fault. Don't buy this DAC, there is better cheaper options on the market.