Metrum Dac owners

I am using a DIY power cable and silver interconnects (VH Audio recipe) that I made a while back and a generic USB cable. Honestly not much of a cable believer, a generic 20 feet $15 cable from the phono stage to the tube integrated sounds fantastic so I am not sure about cables at all.

But I am planning to buy a Uptone ISO-gen to link from the PC to the DAC, I can see value in that, being an EE myself. Audible, may be not, but it's solid engineering.

Bringing this back up...

Were you ever able to compare the usb vs coax inputs in your onyx? I recently purchased an amethyst and am contemplating an eitr. I get occasional pops from the usb input that I attribute to my laptop.

It is worth noting that the ubs input ( 44.1 -192 kHz ) supports a higher resolution file than the coax ( 44.1 kHz -384 kHz ), however I'm not sure how much that matters in a NOS DAC with current content resolution.

@ajnackman  

I have the Onyx, and I used to use it via USB and my MacBook Pro laptop.  It sounded ok, with no pops or other distortions.  I did go thru all sorts of USB correction devices, decrapifiers, Ultrarendu, etc. but not much really improved.

I then got a Matrix X-SPDIF2 ddc, which converts USB from the MacBook to either SPDIF (coax), and AES (xlr), and while I can only upsample to 192k, the music is soooooooooooooo much better than via USB. 

Highly recommended to go this route, though I am not sure if it's my MacBook or the USB that was lacking in the orig setup. I imagine that the EITR would be a positive move too, though I haven't tried it.

I don't have a Metrum DAC (although I'm interested).  However, with my Hegel HD25, about a year ago I replaced my Curious USB / W4S Recovery combination (which I previously thought was great) with an Eitr.  It was a major improvement - probably the most satisfying upgrade I've made to my system. I was literally laughing before I sat down on my listening chair, the difference was so obvious.

So I just got a schiit eitr and all I can say is wow. I was previously using usb out from my laptop into the amethyst, which initially I thought sounded really nice. After throwing the eitr into the chain, the sound is so much more natural. Its hard to explain but isolating the laptop power supply really has helped. I would say that it has reduced some glare I was getting from my system on digital playback. I’m just using a cheap blue jeans SPDIF cable. It took about half a song to realize that this was probably the best 150 (I bought a b-stock unit) bucks I’ve spent on my system. Of course your system has to be revealing enough to notice, I haven’t tried it on my desktop system.