Thank you very much.
I will take a deep dive into the topic before making a purchase.
P.S. Iām already using an Elfcam LC/UPC to LC/UPC OS2 duplex fiber optic cable (5m). 
P.S.
I also used, at first, Elfcam Armored Steel Fiber Optic Cable LC/UPC to LC/UPC OS2 Blackā¦ 
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I need your advice. Can Mutec REF 10 only have 2 50 ohm output, rest is 75 ohm. But, I have multiple gear need an about 4 50 ohm outputs , can I use an adapter or transformer to convert the 75 ohm to 50 ohm output?
I may be wrong. Isnāt your Esoteric clock has 4 x 50 ohm?
As far as I know, 50 ohm and 75 ohm clock cables are using different types of connectors.
Also, it doesnāt make sense to convert 75 ohm to 50 ohm or vice versa, does it?
The LHY OCK-2S I had before has 2 output groups, totalling 6 connectors (3 sine wave; 3 square wave) ā each group 1 x 75 ohm and 2 x 50 ohm by default.
They could be custom-made if ordered from LHY directly. Not sure if LHYās distributors provide similar options.
Or you will save a lot of money if you document a little about industrial, pro audio or audiophile switches. Thus, you will find out that most audiophile switches come from industrial ones put in another shiny case and possibly changed the power source.
For example, Silent Angel, NuPrime Omnia, English Electric 8Switch have the same board from ThunderData. [Uptone Ether Regen - English Electric 8Switch Comparison - Networking, Networked Audio, and Streaming - Audiophile Style] [Uptone Ether Regen - English Electric 8Switch Comparison - Networking, Networked Audio, and Streaming - Audiophile Style]
Melco (Dela) is a modified Buffalo BS-GS2016.And the examples can go on endlessly.
You can also read the discussion about audiophile switches here: Value of audiophile network switches - Audio Gear Talk - Roon Labs Community
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Itās not just the connector characteristic impedance difference. The coaxial cables used for 50 and 75 Ohm interfaces are also different.
Yes, you are correct.
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I also bought a mutec ref10 to compare. It only has 2 50 ohm , so I need an impedance matcher to use 75 ohm output to connect any additional 50 ohm audio devices.
Iām hoping someone can recommend me one !!
One of my clock cables is Gustard C-2, it states the following: * The adaptive design concept makes it compatible with 50 Ohm or 75 Ohm characteristic impedance, so there is no need to worry about impedance issues.
I have tried it on my LHY OCK-2 both 50 ohm and 75 ohm, both worked and I could not detect any differences.
Excellent !! That sounds great. My dac and network adapter are Gustard too, x30 and n18 pro.
Where to buy Gustard c2 cable ? Never mind I found it and bought it. Great advice, thanks so much. Iām really enjoying my x30, with internal streamer and Roon, performance is spectacular.
Iām sorry, but thatās BS. There is no such thing as a passive RF cable being properly impedance matched for both 50 Ohm and 75 Ohm transmission lines. Theyāre fooling audiophiles who donāt know any better. If using it is pleasing then it doesnāt matter, I suppose, but I suspect they wonāt be able to show you identical (or even ideal) VSWR measurements at 10MHz into both loads, let alone there almost certainly being signal degradation from a properly characterized 50 or 75 Ohm source into the source connector side of that cable - whatever itās true impedance may be. For less than the cost of thatā¦ made up bit of magic, get either a Fairview Microwave or a Mini-Circuits or an L-com impedance matching transformer.
Yes, I used to do RF design once upon a time in my career as an electrical engineer.
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Hey cyclist (with training wheels)
if your daddy gives you too much pocket money and you waste it senselessly, here is my account number for you (ESEL)ā¦
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You have really lost all sense of proportion when it comes to cables.
What are you trying to connect to the Ref10, and do you already have a cable? If so, is it 50 Ohm or 75 Ohm?
Ah, I see. You want to connect the 75 Ohm Ref10 outputs to the other two 50 Ohm ports on the Esoteric. If Iām right, then yes you would use these Fairview devices on the 75 Ohm outputs on the Ref10.
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Yes thatās what Iām doing. Thanks for the advice. Much appreciated. I suspect Gustards electronics accept both 50 and 75 ohm, hence their claims about the passive cable. I guess weāll find out soon enough.
Could the Gustard accept both 50 and 75 ohm from the same port ?
Itās possible to do manually with the implementation of a digital switch with a set of source followers that can be switched in depending on the desired impedance, but doing that, and doing it automatically, is probably not something Gustard (or frankly any audio manufacturer) would spend their design budget doing.
Is it possible that given the short distance of travel the signal loss between the impedance mismatch is negligible to the extent the manufacturer recommend using either output?