I don’t bother with the generic (black) PC’s that come in the box cause they often are bottlenecks. Instead, I am using Zavfino Majestic MK1, which I consider a sensible upgrade that brings subtle yet clearly noticeable refinements in my system.
Matrix Audio SI-1 Network Isolator
A recent discussion on the value of network switches by @fire_water rekindled my curiosity about revisiting optical isolation. As someone who leans toward minimalism, a single-box optical isolator was the prime draw and to see if newer devices offering further improvements over my existing optical isolator.
For context, my front end is built around 3 chassis Merging Technologies +PLAYER / Merging Technologies +CLOCK / Merging Technologies +POWER which is already extremely low noise, highly resolving, and very “studio honest,” reflecting its roots in professional high-resolution recording and editing. It doesn’t gloss over upstream shortcomings—if anything, it exposes them. As a result, any change ahead of it is easy to evaluate.
To be fair, my existing Telegärtner OPTO BRIDGE 1000M already performs very well—delivering a cleaner background, lower noise, and solid isolation. No complaints there except it is powered by an external LHY linear power supply…extra cables plus more real estate :-)
So how does the SI-1 compare?
In my system, the SI-1 builds on Opto Bridge foundation with:
- A further reduction in noise floor
- Greater image density and depth
- Improved microdynamics and sense of flow
- A more natural tonal presentation without sacrificing resolution
The biggest difference?
With the Telegärtner, the presentation was clean and relaxed.
With the SI-1, it becomes more organic, fluid, and musically coherent.
My take:
Telegärtner = excellent isolation
SI-1 = isolation plus signal refinement (regeneration) by breaking ground noise and eliminating EMI/RFI riding on Ethernet.
In a highly resolving system, that extra layer makes a meaningful difference.
Here’s the rub guys, not every system truly benefits from an audiophile Ethernet switch or an overbuilt router. That’s been my experience after introducing optical isolation into the chain. Once I did, even a high-quality switch like the Telegärtner M12 Gold Switch became redundant.
IMHO, optical isolation is essential for any serious streaming setup. The SI-1 doesn’t feel like a tweak, it comes across as a final-stage refinement, allowing your streamer to perform at its full potential and reveal what it’s genuinely capable of.
Here is my signal chain,
Apple Router → SI-1 → Streamer (Merging stack) using a pair of FTA Métis LAN cables.
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@lalitk Thank you for the prompt reply. I never use the OE power cords, either. All of my electronics are connected to an Audioquest Niagara 5000 via Audioquest Hurricane power cords. But for this small device I was wondering if you tried the included power cord and compared it to a high-quality power cord. Just curious. I do have an extra Audioquest Tornado power cord, so I'll use that. I do appreciate your reply. Thank you very much. |
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@lalitk -- Thanks for the mini review. Have been circling the Matrix Audio SI-1 for some time lately, and finally placed my order today after checking the stock situation at a dealer here in the EU. It should ship on Monday, and so I’ll be able to implement the unit in my setup this next weekend. Please share your thoughts on the NT-1, should you pull the trigger on that one. It has my interest as well.. |
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