Ethernet Switch UEF MKII
Switch to Digital Like No Other

The Synergistic Research Ethernet Switch Mk II represents a significant leap forward in network audio technology and digital audio reproduction, incorporating advanced innovations first developed for our flagship Voodoo server and $65,000 PowerCell SRX line conditioner. Inside, we now house our most current Electromagnetic Cells for signal filtration, our Ultra-Low Frequency (ULF) biasing system, and our latest linear power supply technology, building upon the success of our first-generation UEF Ethernet Switch in such a way that dramatically improves every aspect of its performance to achieve unprecedented levels of digital signal purity. Audibly, these advancements translate to a noticeably expanded soundstage, enhanced resolution, and improved tonal accuracy across the frequency spectrum compared to the original UEF Ethernet Switch. Bass notes gain authority and articulation, while treble extends with airy precision, unveiling musical details that were previously obscured. With the Synergistic Research Ethernet Switch Mk II, we set another new standard for networked audio.
Hear the Difference
Now with Improved EM Filtration
Digital Signal, Purified

At the heart of the Mk II are our next-generation Electromagnetic Cells (EM Cells), the first reengineering of their technology since we sought our original patent. Initially developed for our PowerCell SRX to address both power and signal clarity in the digital domain, they selectively filter high-frequency noise from incoming AC power and the digital signal path, eliminating electromagnetic interference (EMI) and switching noise that can degrade audio quality. This results in a significantly lower noise floor compared to our original UEF Ethernet Switch.
Ultra Low Frequency Biasing
Shape the Stage
A critical advancement in the Mk II is introducing our ULF (Ultra Low Frequency) Biasing system, a feature absent in the first-generation model. This groundbreaking technology replaces high-frequency noise with harmonics of the Earth’s Schumann Resonance, which pass through the EM Cells unaltered. Unlike our previous switch, which focused solely on first order noise reduction, the Mk II enhances system musicality through this ULF Biasing.
Linear Power Supply
Strong and Silent

The Mk II also incorporates our latest linear power supply (LPS) technology, refined during the development of the Voodoo server. This advanced LPS optimizes the DC bias for the EM Cells and the switch itself, unlocking performance levels unattainable from the first-gen UEF Switch. The result is cleaner power delivery and more stable, jitter-free data transmission, even under peak network loads.
SR Ground Block
This goes to 11.

We’ve even included a direct connection port so you can star ground your new Ethernet Switch UEF to an SR Ground Block for an even lower noise floor. Subjectively in our reference system with an Ethernet Switch UEF we hear a more natural presentation of space and harmonic texture that rivals the best LP and tape playback. We also hear a Jet Black noise floor and dynamics analog rigs cannot match. Perhaps we have finally achieved “Perfect Sound Forever.” The only question is, have we surpassed analog playback? Only you can answer this question with a no-risk money-back guarantee. Find out now by calling your authorized Synergistic Research dealer to arrange your in home audition today.
SR Pink Fuse installed
Beauty is in the Eye of the Fuse Holder


Ethernet Switch UEF Specifications:
MSRP
$2895 110V
$3195 230V
with included 5ft Foundation 12awg AC cable ($599 Value)
and SR Pink Fuse ($249.95 Value)
Dimensions - 2.6″h x 10″w x 6″d
Weight - 6.2 lbs.
Ethernet Switch UEF Packages
Bundle and Save

Shown (above) with Atmosphere SX Excite AC and Atmosphere SX Reference Ethernet
Ethernet Cable Bundles
Foundation SX Ethernet +$299 (MSRP $449.00) - 1 meter
Atmosphere SX Ethernet +$550 (MSRP $795.00) - 1 meter
Atmosphere SX Reference Ethernet +$800 (MSRP $1195) - 1 meter
Galileo Discovery Ethernet +$2295 (MSRP $3395) - 1 meter
(One ethernet cable discount per purchased Ethernet Switch UEF)
Power Cable Bundles
(5ft Foundation SX 12awg included standard)
Foundation SX 10awg +$100 (MSRP $699) - 5 ft
Foundation SX XL 12awg +$349 (MSRP $999) - 5 ft
Foundation SX XL 10awg +$499 (MSRP $1,199) - 5 ft
Atmosphere SX Alive +$895 (MSRP $1,495) - 5 ft
Atmosphere SX Excite +$1495 (MSRP $2,495) - 5 ft
Atmosphere SX Euphoria +$2295 (MSRP $3,495) - 5 ft
Galileo Discovery +$5500 (MSRP $6,995) - 5 ft
(One power cable upgrade discount per purchased Ethernet Switch UEF)

Digital Audio Component Reviews


Robert Taylor goes 3-for-1 in this review of the Synergistic Research Voodoo Streamer, SR Network Switch, and SR Router. Is there something more than magic going on in the sleek, stylish, Synergistic boxes, listen in to hear Robert’s thoughts.
Robert Taylor, The Absolute Sound, February 2025

From the opening seconds, I could feel the atmosphere in the venue. The music had a clarity, presence, and natural feel that, for the first time, made me think there was something worthwhile to streaming music. The sibilance was finally controlled. The soloists were so realistic I could feel something like their personalities in their voices. Musicians were solidly placed in realistic, identifiable positions on the soundstage. Jackson Browne sounded like I had heard him on my reference CD & LP rig. And the applause came from real people in the audience.
Rick Becker - Enjoy The Music - November 2021

"There are products that can be considered just the icing on the cake. This is not that. The Ethernet Switch UEF provides a dramatic step forward for streaming and digital performance. It is an important component and without question a real game changer. Congrats to Synergistic Research for another outstanding design and for the superb product execution."
Robert Youman - Positive Feedback - December 2021
User Reviews
After just the first minute of listening to one of my test tracks I’ve got a smile on my face and a very rare feeling that I seem to have caught a Big Fish today! During my 20 years of audiophile life with each new component or tweak you can more or less predict what to expect and usually it works out the way you thought it would. That’s not the case today. The changes I hear seem to have added another dimension to music! It seems to be some kind of Higgs boson in my house which caught me completely off guard. The music flows in a continuous stream so effortlessly, coherently and naturally that I find myself not breathing in my favorite parts. New timbre nuances, tonal textures… dynamic decays and bursts become frighteningly realistic! Surprisingly, with the increased amount of information, realism and accordingly emotional involvement I feel more at ease listening to music .
As if before that all musical elements on the canvas were tangled by some kind of invisible web that hindered them somehow, interfered with their natural freedom. SR Router was a real discovery when it comes to which component is the most important in a system. It is N1 device out of all components/tweaks/enhancements for streaming audio I’ve auditioned to date and an absolute must-have.
Alex G. - June 2023
I was guided by the amazing Andy Wiederspahn, who suggested that the most immediate changes to the system could be had by a combination of the Galileo Discovery ethernet cable and their UEF Ethernet Switch. They arranged a demo for both. I was excited to hear what was to come.
But, was absolutely NOT prepared for the RESULT. Inserting both into the system transformed it incredibly. The greatest transformation for the least cost I have enjoyed. The imaging became wholly transparent – not more so, wholly. Invisible. Seamless. Positioning of every element was as if in-the-room. Tight. Precise. MAGIC! The relaxed, organic decay of voice and instrumentation became next level, resulting in an ability to hear even the subtlest nuance in a natural, open, un-hyped manner. From classical to rock, EDM, electronic, Pop, Rap, R+B, Soul, etc. = transformative. Everything is meaningfully more so cohesive in ways I have not heard in my very many years of listening. The spectrum of sound reads empirically true and aligned. Which is exactly what I have been working to create for so many years.
It’s moments like these where one must then make the hard decision as to what next to play, discovering the song anew, and then having people keep asking, “Why are you smiling so much?”.
It’s an experience I can’t recommend more. Make you and your ears fulfilled.”
Mark Beaven – Founder and Co-CEO Advanced Alternative Media, Inc -
The most identifiable global brand for Producer and Songwriter management
"I have been so fortunate to have worked very closely with many of the legendary artists, producers, songwriters and mixers of our time for over 40 years.
I love music and, particularly music when it sounds great. To that end, I have continually updated and evolved my system of playback. As a rule, one never wants to listen to someone’s work with them and have it sound terrible. It’s a good way to lose major credibility and respect. Far better it sound the best they have heard it. I have been lucky to regularly have that be the case. Studio listening versus audiophile listening is extremely different.
I have a highly evolved and considered playback system working in a great room. I have continued to upgrade it at the highest levels of gear and playback results. Always seeking that next level of audio nirvana….
I had spotted mention of various tweaks online and so queried my audio guru about updating elements of the system with various linear power supplies. He noted a number that would bring a great deal and suggested that a filter in the ethernet path would help meaningfully.
I began researching what would be the best solutions, I immediately ran across Synergistic Research, their incredible line of products, and the tremendous respect they enjoyed for their work.
In further proof one can always learn something, my belief of digital cable being basically equal due to the 0 and 1 nature of transmission and that I could work from the source of audio downward in the audio path, was found to be greatly misconstrued. Recognizing the issues of electrical transmission within cable and the potential for noise, I was ready to learn.
I was guided by the amazing Andy Wiederspahn, who suggested that the most immediate changes to the system could be had by a combination of the Galileo Discovery ethernet cable and their UEF Ethernet Switch. They arranged a demo for both. I was excited to hear what was to come.
But, was absolutely NOT prepared for the RESULT. Inserting both into the system transformed it incredibly. The greatest transformation for the least cost I have enjoyed. The imaging became wholly transparent – not more so, wholly. Invisible. Seamless. Positioning of every element was as if in-the-room. Tight. Precise. MAGIC! The relaxed, organic decay of voice and instrumentation became next level, resulting in an ability to hear even the subtlest nuance in a natural, open, un-hyped manner. From classical to rock, EDM, electronic, Pop, Rap, R+B, Soul, etc. = transformative. Everything is meaningfully more so cohesive in ways I have not heard in my very many years of listening. The spectrum of sound reads empirically true and aligned. Which is exactly what I have been working to create for so many years.
It’s moments like these where one must then make the hard decision as to what next to play, discovering the song anew, and then having people keep asking, “Why are you smiling so much?”.
It’s an experience I can’t recommend more. Make you and your ears fulfilled."
Mark Beaven – Founder and Co-CEO Advanced Alternative Media, Inc -
The most identifiable global brand for Producer and Songwriter management