Apparatus according to what I expected, a connection possibilities perspective. From an audio standpoint, the converter of this DAC makes improvements on some devices, less on others. On a SONY drive or Technics, the result is somewhat mitigated compared to the result obtained through the DAC internal drives. Finally, the most convincing result was achieved on a Marantz CD67SE where its analog output drive seemed effete. Curious, because we could expect an improvement on the SONY Technics and less posh upmarket. This DAC would have it his heads? Or so he likes you the "transport" mechanically efficient enough to make his signal processing optimization work properly. Moreover, I had to spar with me a random equipment failure. After two hours of listening, he began to select entries for itself, sweeping optical inputs, coaxial and USB without my touch anything. Crash problem of micro proc? I got through it that unplugging the sector overnight. The next day everything is back to ordre.Je have not yet rounded up the service, I test the beast a little longer. I have not used the USB connection, my PC home player is being mounted by me. Regarding the construction of the device, it's serious. The interface is nice. 4 correction curves programmed not convinced me at all. Maybe the PC home player. I listen to FLAC and still quite skeptical about the subject. Good camera, connectivity to the interesting but whose reliability can seem improved.