Lumin U2 or Aurender N200

Just went back and forth between fibre and cat 7- (its actually a cat 7 cable) both from the Cisco switch into the etherREGEN powered by Plixir BDC. Used Keb Mo - "I was wrong".

Really difficult to hear any difference- I had to go back and forth a dozen times:

Bass pretty much equal, if anything there is a little more bloom with fibre- I don’t find any difference with body- but treble- in this case cymbals/harmonica is a touch more prominent and forward with fibre. Gives the impression it is a little more detailed, more air, but I could see that interpreted as glare.

Doesn’t come across as hardness or glassi-ness though. I’m pretty confident I don’t think I could tell the difference if someone tested me- and this was just one track- more listening required!

edit: if someone was curious optical/transceivers are from AS 

Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m DOM Duplex LC MMF Transceiver Module #11774	2	11774	C$ 9.50	C$ 19.00
	15m (49ft) LC UPC to LC UPC Duplex OM3 Multimode PVC (OFNR) 2.0mm Fiber Optic Patch Cable

@mclinnguy that’s a great test track and a very good recording.
Out of curiosity, what Cat7 cable are you using? That’s between the etherregen and streamer correct?

Between ER and Weiss is an Audio Sensibility Supra cat 8- they modify it by cryo'ing the cable and adding Telegartners- very reasonable price 

AS Supra ethernet

That ethernet cable remained in place. I only swapped the cat 7 from the Cisco switch to the ER- it is 50' $22 one from Monoprice and goes up inside the back wall across the ceiling and down the wall in front of the gear. 

Yes, before you suggest I am now researching Muon stuff :) Pricey for sure!

Actually I recall you having an Eno before also; it didn't work for you? 

I prefer to avoid more wall warts, and more conversions. I find the possibility of introducing more AC line noise via additional active devices far outweighs any idea that the 30’ feet of Ethernet from my outside wall is going to help.

I do however use this right before my streamer’s switch both for noise and to add 4kV of isolation and surge protection:

@mclinnguy Eno was nice but mellowed everything out a bit too much. I sold it before I got the N200. Kind of wish I still had it so I could try it. oh well…

I’m familiar with Supra with Telegartner. Tried it. Decent. Wasn’t as good as the Eno system or the Purist Audio that I’m using now. 
The Muon is expensive. I can’t think of a good reason to spend that much for a filter although I’m sure it’s nice. I’ll be just using the best possible Ethernet cable.