ctzzzz.......I have two digital cables connected between my Aurender N10 and the Esoteric K-01X DAC, a Wireworld Platinum USB cable and a Wireworld Platinum Starlight coaxial cable. In this manner I can switch between the digital outputs on the N10 at will to accommodate PCM and DSD source material. My preference is to use the digital coaxial output that takes full advantage of the Aurender N10's oven controlled crystal oscillator (OCXO), and its extremely accurate and stable 12.8MHz clock with an accuracy of 0.02 parts per million (ppm).
The Accuphase DC37 DAC uses two ESS ES9018 eight channel DAC's, one for each left and right channel, that incorporate a 27 MHz crystal oscillator on the DAC chips. I was unable to find any published information with respect to the accuracy of these onboard oscillators. In all cases the chip based clock times all digital inputs to the DC37 DAC.
I would suggest you use the highest quality digital cables you can afford. It has been my experience that the Wireworld Platinum level cables have outperformed all the other digital cables I have used previously. I also suggest you spend plenty of time listening to both the Aurender N10's coaxial output and USB output to determine for yourself which connection offers you the most satisfaction.
If you haven't already, you may enjoy reading my
Aurender N10 Caching Music Server review