i just received my E50 and extremely happy with it, very very nice sounding dac. I use it at max volume (0.0) and zero additional noise it adds to the sound. One thing that was very surprising for me was when i use usb connection and my graphic card kicks in, E50 is filtering the noise perfectly and there's no audible difference between graphic card is in use and dac is turned off. My previous dacs with same pc were used to badly affected by graphic card in load..E50 is simply filtering it perfectly. Amazed. Also, built quality, touching sense etc. feels premium. This is a solid dac. Highly recommended.