I have been enjoying my Eitr for a few weeks now but based on info from Puma Cat I decided to try upgrading cables. First the USB, then the S/PDIF then finally a high grade LPS. USB cables do make a difference and it can be significant. I have been using an AudioQuest Diamond for the past two days and it was well worth the cost! The Diamond made a huge difference in size of soundstage. Also imaging was improved with more air around voices and instruments. My chain is PC > Diamond USB > Eitr > Brooklyn DAC+ > Kenzie amp > HD800S phones. The Diamond probably is overkill on a mid-fi system that is less revealing but if you have a high end system it is worth considering.