Unfortunately, it has big problems with the working current through the USB port.
On a Macbook Pro Retina or a Thunderbolt display the DAC was not usable.
Every few hours, the sound is totally distorted and also can be found frequently crack in playback.
Only one switching on and off has commanded for a short time relief.
The DAC is removed and the powered speakers connected directly and you were gone all noise.
The product is advertised with high quality and shielding. Only precisely these points are not met.
