MLGrado
500+ Head-Fier
USB is generally a pretty terrible means of transporting audio data. S/PDIF and TOSLINK are designed specifically for it. USB is capable of being just as good, but it is an extremely costly proposition.
I never felt USB audio equalled SPDIF until I finally got true Galvanic isolation between my PC and DAC. Yes, my DAC has galvanic isolation inside the DAC, but, it Galvanically isolates the I2S line. So, the USB receiver itself is not isolated, and furthermore the receiver requires the USB 5v bus to operate!
But the Intona USB isolator is a god send. Now the biggest weakness is the 5v USB bus. I am using a LPS plugged into an isolation transformer, and the results are outstanding. If you put your headphones on, turned to volume on amp all the way up WITHOUT the above inserted in the chain, all the hash and noise and other nasties is loud and proud. After all the above, dead silent.
So to your point, yes, it takes a lot, but it can be done. Now, I will un-hijack the thread....
Trying to decide if I want the Atticus or Eikon. My current reference headphone in the Audeze LCD-X. Which one of the two, Atticus or Eikon, has the most similar presentation? Thanks, if someone can answer that, it will help me get a better mental gauge on what these are all about...