Fiber or Eithenet

I don’t think it makes an audible difference... but...

at 30’ or more the chances of inductively picking up a surge voltage from a nearby lightning strike is non zero. Given the chance to run either fiber or Ethernet I would 100% run fiber for that reason alone.

If you are like me you have expensive gear at both ends of a run like that. PC’s on one and HT equipment on the other. Fiber is best, but as I wrote elsewhere, your risk from nearby lightning strikes may be a lot lower than mine.

Otherwise, if you already have or must run a long Ethernet, use an isolator which is certified to UL60601. 

Fiber moats drop the noise floor, but some reported takes the “life” away from the music. 

If your streamer/dac can accept fiber directly (as my Lumin X1 does) it was a BIG improvement!

ozzy

@hollandw I’m curious about the iFi pro. Will probably give it a shot. My streamer only accepts Ethernet  

As to Ethernet cables, I periodically replace my Purist Audio CAT7 with Linkup with same result every time. I guess I’m still hoping to not hear the difference but the Linkup, which is a nice cable, doesn’t hold a candle to Purist. 

@audphile1 I say go for it, I was really surprised at how things improved in my system. There's a toggle button at the back of the Lan Pro which turns off the tacky lights which I can't stand. Also, you'll be needing a separate iFi Power Supply, I'm using my Lan Pro with an iFi Ipower X. The stock one is no good.