Has anyone tried the new Synergistic Research UEF Performance Enhancer - Ethernet Filter?

Why would you want that ? We have tried that in our audio get together  ,the Sonore Deluxe is by far the best 

way ,converting Ethernet to Fiber optic which noise cannot  travel over light .

Small Green Computer I went to , myself started with their $40 converter then a Sonore deluxe  to fiber optic ,then Ethernet to your server,or streamer .

i took it one step further bought the latest Motorola 8702 modem wifi router  ,which has the latest fastest 3.1 vs the older 3.0 Docsis ,it is 3-4 x faster much bigger buffer and bigger newer processor was $300 now $224 , if you get a Amazon credit card you get a $125 credit ,$99 for a $300 modem,router with excellent wifi boost ,I bought that  then added a 12v ,8 amp LPS which makes a noticeably clearer  detailed performance ,I am adding a second Sonore deluxe ,plus 2 more LPS to round off the front end ,I already have AQ Diamond Ethernet cables which are very good the Top Jcat cables  are also very good in the $1k  price point .

getting back to the original question  A Sonore Deluxe Ethernet to fiber optic is much better isolating noise even better then uptone better isolation ,and sonics using top Femto clock and linear regulators,plus a bunch of other items to eliminate noise. Just buy a Sonore ,and they have a $399 package  to get started ,

the new Motorola 8702 a no brainer for $99 , but even at $224 still $76 off save $$ while it’s on sale, 

I will state this for I have heard most everythung via our north est get together-club 

the synergistic Ethernet hub does everything ,comes with a $500 power cord $200purple fuse with discounts around $1700 when you think about it I spent $1100 for my Linear tube audio LPS ,then the fuse and a Pangea powercord 

uptone $630 almost the same and the Synergistic is the 👑 king at in the$under $2k mark and your streaming sounds much more realistic and detailed ,even lesser recordings , just save and buy one . All these other hubs you need a Good LPS 

not these crappy $299 specials the Linear tube I have was as good if not better then the $1300 Paul Hines , which was excellent sadly went out of business. 
I may be selling my LPS  to fund $$ digital like the T+A 200 dac I have my 👁️ 👁️ S on and is galvanically isolsted but $7k  is a investment but great dac .

My brother has the T+A200 dac and innuos streamer 

I had the Denafrips terminator 2 , I hav3 had the T+A ,Innuos in my setup 

it’s on another level ,we have done head to head with the chord Dave 

Mola Mola, and $ 18k DCS  the T+A 200 just is more dynamic and natural sounding , and it has many adjustments and HQ player built into the design with 4 dither settings , giving you tons of extra versatility , I am just starting to under stand .HQ player takes up some compression processing power , if you have enough extra HD, Preferred SS and 16 megs of memory preferred you can literally 

tune your dac to your personal taste,Thst being said just on its own it’s there is No peer at its $7k price point, at 2x then it may be more personal taste .The chord Dave a bit more leading edge detail for example but less engaging ,with the Dave upsampler then that's another story and a lot of $$ !!