Ethernet - Analog/Digital Signal Clean Up

I thought the Mojo dac usb inputs didn't require usb power, if usb board within dac not self powered could make difference. If that case, I'd try another input on Mojo dac, means not optimized for usb.

@sns - I hadn't thought about that but you may be right.  I will try disconnecting the power leg of the USB cable to check it out.  I seem to remember being able to do that with my Pavane DAC. 

Surprisingly, removing both the Gigafoilv4 and the eno, and connecting the Ethernet cable directly into my streamer/server may have resulted in my favorite configuration.

Further listening, and connecting/disconnecting stuff has led me to the same conclusion as before, which I have quoted above.  My system and environment must not suffer any particular noise problems since these accessories that are intended to mitigate noise seem to have almost no sonic effect on my system.  If anything, the ENO adds the extremely subtle effects of smoothness and darkness, with no noticeable improvements in noise reduction as noise in my system is already vanishing low.   

As before, the Gigafoil seems to move things a tiny bit in the other direction, also  with no noticeable reduction in noise.  Maybe this is why my second choice set-up was to include both the Gigafoil and the ENO, since they sort of cancel each other out wrt sonic contribution.  

Therefore, my only conclusion is that these add-on accessories (ENO, Gigafoil, Bonn N8, and fiber with converters) seem to be unnecessary in my system, so I can save my money.  Also, there may be something to the thought that having better components reduces the need for accessories as I cannot envision these things making the substantial levels of sonic improvements reported by some here.  YMMV

@mitch2 not surprised at all by your findings. As the quality of your components goes up the need to have all these filtering and regenerating devices goes away. More is not always better. Like I said earlier, in my system the NA Eno streaming system alone was all I needed. That was with Lumin U1 Mini and Benchmark DAC 3 HGC. 
I’ve since upgraded to Bricasti M3 with Network player (no longer need dedicated streamer) and haven’t yet retested / re-evaluated the sound without the NA Eno. Planning on doing that soon. 

“As the quality of your components goes up the need to have all these filtering and regenerating devices goes away. ”
@audphile1 

That’s been my findings as well. And Congratulations on embracing the future of streaming, today.  The network attached high quality DAC is the way to go.