Affordable ethernet filters

[highstream]

I have tried multiple LAN isolators
Ifi v1 and new ifi , acoustic revive ,

At the end I liked this one the most , it’s under 300USD ,
https://www.sellarz.com/goods/view?no=107

I got it from EBay , this is final filter before entering Grimm MU2 .

Money aside, what led you to like the Sellarz?

Follow up: In looking at the eBay Sellarz site, there are two LAN isolators -- both passive it appears -- so I asked about the differences. Below are the replies:
LNF-10G: 10Gbps LAN Noise Filter for Music Server, Eliminate Transmission Noise ($198)
LNF-10GuM: 10Gbps LAN Noise Filter for Audio(10Gbps Isolator, Mu Metal Shield) ($253)
(https://www.ebay.com/str/sellarzelectronics?_trksid=p4429486.m3561.l170197)

"The LNF-10G's enclosure is made of ABS plastic, making it less susceptible to external physical impact than the LNF-10GuM, which is made of aluminum. However, the voltage characteristics of the material become the external insulation withstand voltage characteristics of the LAN filter.

LNF-10GuM is insulated with two layers (1 mil x 2) of Kapton Tape and has a theoretical insulation voltage of about 15kV (7.5kV x 2), but the enclosure of LNF-10G is made of 2 mm thick ABS material and has an external insulation voltage of min. 15.7 kV/mm x 2 = 31.4 kV(max. 34 kV/mm x 2 = 68kV)

Therefore, it [LNF-10G] is recommended to be installed in places where high insulation voltage is required. And considering that one of the functions of LAN Filter is “Isolation,” LNF-10G has an advantage in this very important function over other LAN filters. For reference, although you can't see it in the product photos, the LNF-10G is finished on the outside with very thick clear heat-shrink tubing."

[Also about the LNF-10GuM]:
"We usually call it electromagnetism, but this is actually a concept that combines electric and magnetic fields, and they should actually be distinguished. The metals with high conductivity, such as silver and copper, shield electric fields but not magnetic fields. Such metals are very transparent to magnetic fields. For shielding magnetic fields, ferromagnetic metals such as nickel or iron, especially high-permeability metals such as Mu-metals, are excellent for shielding magnetic fields.

Therefore, LNF-10GuM is used to prevent signals from being distorted by magnetic fields when there are devices or components that generate strong magnetic fields very close by."

 

[Datka]

Money aside, what led you to like the Sellarz?

Follow up: In looking at the eBay Sellarz site, there are two LAN isolators -- both passive it appears -- so I asked about the differences. Below are the replies:
LNF-10G: 10Gbps LAN Noise Filter for Music Server, Eliminate Transmission Noise ($198)
LNF-10GuM: 10Gbps LAN Noise Filter for Audio(10Gbps Isolator, Mu Metal Shield) ($253)
(https://www.ebay.com/str/sellarzelectronics?_trksid=p4429486.m3561.l170197)

"The LNF-10G's enclosure is made of ABS plastic, making it less susceptible to external physical impact than the LNF-10GuM, which is made of aluminum. However, the voltage characteristics of the material become the external insulation withstand voltage characteristics of the LAN filter.

LNF-10GuM is insulated with two layers (1 mil x 2) of Kapton Tape and has a theoretical insulation voltage of about 15kV (7.5kV x 2), but the enclosure of LNF-10G is made of 2 mm thick ABS material and has an external insulation voltage of min. 15.7 kV/mm x 2 = 31.4 kV(max. 34 kV/mm x 2 = 68kV)

Therefore, it [LNF-10G] is recommended to be installed in places where high insulation voltage is required. And considering that one of the functions of LAN Filter is “Isolation,” LNF-10G has an advantage in this very important function over other LAN filters. For reference, although you can't see it in the product photos, the LNF-10G is finished on the outside with very thick clear heat-shrink tubing."

[Also about the LNF-10GuM]:
"We usually call it electromagnetism, but this is actually a concept that combines electric and magnetic fields, and they should actually be distinguished. The metals with high conductivity, such as silver and copper, shield electric fields but not magnetic fields. Such metals are very transparent to magnetic fields. For shielding magnetic fields, ferromagnetic metals such as nickel or iron, especially high-permeability metals such as Mu-metals, are excellent for shielding magnetic fields.

Therefore, LNF-10GuM is used to prevent signals from being distorted by magnetic fields when there are devices or components that generate strong magnetic fields very close by."

What I liked about this guys was.
Website listed a lot of technical information, measurements and such , price and build quality.
They also produce what appears to be high-quality audio equipment components similar to Ian Canada…
This is the model I received and I quite like it.

 

[highstream]

What I liked about this guys was.
Website listed a lot of technical information, measurements and such , price and build quality.
They also produce what appears to be high-quality audio equipment components similar to Ian Canada…
This is the model I received and I quite like it.

What it is about it you like, specs aside, i.e., sonically, since you compared it with others. That kind of information is helpful for the rest of us.

 

[Datka]

purpose of the filter is removed noise in network and at the same time, maintain dynamics and excitement in music .
with Grimm MU2 I’m able to listen to digital streaming with network cable fully disconnected , so I know how MU2 sounds without any network influence.
goal was to find filter that would make sound as close to the one with no network cable ,
I’m also using LHY Fiber FMC with LHY SW 6 switch , and after SW6 final filtering is done with Sellarz filter before entering to MU2 …
Next year I might get Muon Neo2 or Pro to compare.

 

[DHT4ME]

I am not sure if it has been discussed but the m12 based switches are really tuned industrial switches. The industrial units are made to withstand severe environments from temperature, vibration, moisture and power fluctuations. I went down the switch rabbit hole a while back and bought most of the switches everyone was talking about from Cisco to Pang modded , Ether Regen, and Jcat m12. I even did new clocks and ultra low noise power supplies in some. While I still use the Ether regen I discovered industrial switches and now use 2 M12 style switches from Korenix before my Ether regen. 1 has an OCXO clock that I installed and the other is stock. Unlike consumer units these typically take 12 to 24vdc and have internal regulators for the sections. They are built like tanks and are ridiculously inexpensive compared to the boutique models.

 

[agisthos]

@DHT4ME

You have Korenix Jetnet 3006-M12 ? These are under $100. Was the clock upgrade custom ?

The only issue with M12 switches is needing to find cables to work with it. Most do not have ethernet cables with M12 connection lying around.

 

[Elberoth]

@DHT4ME

You have Korenix Jetnet 3006-M12 ? These are under $100.

More like $27:

New Korenix Jetnet 3006-M12 Industrial 6 Port Unmanaged M12/IP68 Ethernet Switch | eBay

THIS IS NEW. Please look at the pictures for exact cosmetic condition or call us at 111 111 1111. We offer no-questions-asked 30 day returns.

www.ebay.com

 

[Elberoth]

@DHT4ME

The only issue with M12 switches is needing to find cables to work with it. Most do not have ethernet cables with M12 connection lying around.

You can get this adapter:

 

[Republicoftexas69]

@DHT4ME

You have Korenix Jetnet 3006-M12 ? These are under $100. Was the clock upgrade custom ?

The only issue with M12 switches is needing to find cables to work with it. Most do not have ethernet cables with M12 connection lying around.

Amazon.com

 

[NaimYourTubes]

View attachment 141358I am not sure if it has been discussed but the m12 based switches are really tuned industrial switches. The industrial units are made to withstand severe environments from temperature, vibration, moisture and power fluctuations. I went down the switch rabbit hole a while back and bought most of the switches everyone was talking about from Cisco to Pang modded , Ether Regen, and Jcat m12. I even did new clocks and ultra low noise power supplies in some. While I still use the Ether regen I discovered industrial switches and now use 2 M12 style switches from Korenix before my Ether regen. 1 has an OCXO clock that I installed and the other is stock. Unlike consumer units these typically take 12 to 24vdc and have internal regulators for the sections. They are built like tanks and are ridiculously inexpensive compared to the boutique models.

Fascinating. How are you powering them?

 

[Republicoftexas69]

Fascinating. How are you powering them?

QADA-90-24-1442 | DigiKey Electronics

Order today, ships today. QADA-90-24-1442 – 24V 90 W AC/DC External Desktop (Class I) Adapter Cord (Sold Separately) Input from Qualtek. Pricing and Availability on millions of electronic components from Digi-Key Electronics.

www.digikey.com

 

[DHT4ME]

I was able to get the m12 adapter cables from Amazon which was simpler than I expected. I power one from a Jung regulator with the AD797 option and the other is a supercap supply that you can see in the back of the cabinet. I also run the Uptone Ether Regen from the supercap supply.

I did the clock upgrade myself. They have 2 parallel boards inside and the clock was fairly easy for me to fit but I am a very experienced tech. It is absolutely ridiculous that something built like these could be selling at the discount price that they are. I think it is because they are only gigabit vs 10G. You could stop a grizzly bear with a blow to the head with one of these and it probably will still work perfectly. My friend who loaned me the Jcat passed away in August so I no longer have access to it but it looked to me like a fairly standard industrial unit like these with a clock upgrade.

 

[Maryland]

I was able to get the m12 adapter cables from Amazon which was simpler than I expected. I power one from a Jung regulator with the AD797 option and the other is a supercap supply that you can see in the back of the cabinet. I also run the Uptone Ether Regen from the supercap supply.

I did the clock upgrade myself. They have 2 parallel boards inside and the clock was fairly easy for me to fit but I am a very experienced tech. It is absolutely ridiculous that something built like these could be selling at the discount price that they are. I think it is because they are only gigabit vs 10G. You could stop a grizzly bear with a blow to the head with one of these and it probably will still work perfectly. My friend who loaned me the Jcat passed away in August so I no longer have access to it but it looked to me like a fairly standard industrial unit like these with a clock upgrade.

Would you consider showing pics/a diagram of how you fit the clock?

 

[DHT4ME]

Would you consider showing pics/a diagram of how you fit the clock?

I have a spare in a my storage. If I can't find it I will open the one in my system. There are a few clocks in there if I remember correctly however only 1 does the master clock for the controller chip. If I were to do it again I would fit a Super cap in on the clock regulator.

I am surprised that someone has not offered upgraded models being that the industry certainly supports the cost.

 

[Paul1960]

View attachment 141358I am not sure if it has been discussed but the m12 based switches are really tuned industrial switches. The industrial units are made to withstand severe environments from temperature, vibration, moisture and power fluctuations. I went down the switch rabbit hole a while back and bought most of the switches everyone was talking about from Cisco to Pang modded , Ether Regen, and Jcat m12. I even did new clocks and ultra low noise power supplies in some. While I still use the Ether regen I discovered industrial switches and now use 2 M12 style switches from Korenix before my Ether regen. 1 has an OCXO clock that I installed and the other is stock. Unlike consumer units these typically take 12 to 24vdc and have internal regulators for the sections. They are built like tanks and are ridiculously inexpensive compared to the boutique models.

It is amazing that those Korenix switches are so cheap for what they are. But I'm a little confused about why they would make any positive difference. There isn't anything I saw on the company's website or manual that makes any kind of claims about the signal quality or lack of noise or interference in the signal. I guess that when you compared them to other switches you simply liked them better? Also, what is the point of having two of them? Thanks.

 

[agisthos]

It is amazing that those Korenix switches are so cheap for what they are. But I'm a little confused about why they would make any positive difference. There isn't anything I saw on the company's website or manual that makes any kind of claims about the signal quality or lack of noise or interference in the signal. I guess that when you compared them to other switches you simply liked them better? Also, what is the point of having two of them? Thanks.

Exactly what I was wondering.

@DHT4ME you say you compared these to others, including the J-Cat (Telegartner) M12. Well by listening ? or by noticing its an industrial switch design and then rolling your own?

That J-Cat switch is highly regarded by many on the switch roundabout, so if the Korenix with a few internal mods can get close to it that would be something great, as the Telegartner gold is 5k euro.

 

[DHT4ME]

Exactly what I was wondering.

@DHT4ME you say you compared these to others, including the J-Cat (Telegartner) M12. Well by listening ? or by noticing its an industrial switch design and then rolling your own?

That J-Cat switch is highly regarded by many on the switch roundabout, so if the Korenix with a few internal mods can get close to it that would be something great, as the Telegartner gold is 5k euro.

I compared it directly to the J-Cat that a local audio nut has. I didn’t buy one as it was clearly better than the Ether Regen but really not another 4k worth. The stock Korenix has its own sound as well that I would say is similar to the “clean” side of the Ether Regen. The clock upgrade gave much more precision, detail and seems more dynamic than the stock clock which is really not special however the case is watertight and milled from a solid block so the clock environment is quite stable. To me none of these switches we use is what we would call neutral as every one seems to be different and using them in series yields different results even with the order that they are in the chain. I have had the Korenix since just before Covid and really have no desire to change. I have bought several and upgraded for a few audiophiles In the local audiophile group of which I am president of here in Las Vegas.

As a retired engineer it is no surprise that manufacturers chose these platform to make a really great switch. They are hardened and designed for harsh environments with temps from -40 to 176 degrees, high vibrations, water tight, and vide variations in operating voltage. It’s really not unique for high end audio.

I also have one of their DIN rail mount switches that uses standard RJ connectors. Even though it’s Swiss made it is not made like the M12 switch and I have that one right after the modem at my service entrance. I did not do any clock upgrade on that one.

I do have another new M12 unit and I believe I still have 2 or 3 clocks. If I get time after the holiday I will carve out some time and mod it while taking pics. I can make it a loaner but I really don’t have much spare time to do any upgrades. Speaking of clocks, the different ones all have their own sound which is related to their phase noise profile which to me is really what people are noticing.

 

[NaimYourTubes]

I compared it directly to the J-Cat that a local audio nut has. I didn’t buy one as it was clearly better than the Ether Regen but really not another 4k worth. The stock Korenix has its own sound as well that I would say is similar to the “clean” side of the Ether Regen. The clock upgrade gave much more precision, detail and seems more dynamic than the stock clock which is really not special however the case is watertight and milled from a solid block so the clock environment is quite stable. To me none of these switches we use is what we would call neutral as every one seems to be different and using them in series yields different results even with the order that they are in the chain. I have had the Korenix since just before Covid and really have no desire to change. I have bought several and upgraded for a few audiophiles In the local audiophile group of which I am president of here in Las Vegas.

As a retired engineer it is no surprise that manufacturers chose these platform to make a really great switch. They are hardened and designed for harsh environments with temps from -40 to 176 degrees, high vibrations, water tight, and vide variations in operating voltage. It’s really not unique for high end audio.

I also have one of their DIN rail mount switches that uses standard RJ connectors. Even though it’s Swiss made it is not made like the M12 switch and I have that one right after the modem at my service entrance. I did not do any clock upgrade on that one.

I do have another new M12 unit and I believe I still have 2 or 3 clocks. If I get time after the holiday I will carve out some time and mod it while taking pics. I can make it a loaner but I really don’t have much spare time to do any upgrades. Speaking of clocks, the different ones all have their own sound which is related to their phase noise profile which to me is really what people are noticing.

Thank you for sharing this info. I just bought two of that exact Korenix M12 switch and would really appreciate any additional info you would like to share about them. Clock mods, anything. TIA.

 

[DHT4ME]

switches

Thank you for sharing this info. I just bought two of that exact Korenix M12 switch and would really appreciate any additional info you would like to share about them. Clock mods, anything. TIA.

You will need either Ethernet cables with male m12 to RJ45 or two of these: https://a.co/d/7Z8o8jf

You will also need a DC supply. The unit can take a wide range as it has internal linear regulators. I use an 18v Jung Super Regulator.
It came with the m12 power plug for terminating your DC supply wire.

The clock to upgrade is 25mhz. The unit has 2 stacked boards that have about an inch space in between. I went to my storage and found the spare I have and will use it for pics.

 

[Republicoftexas69]

It is amazing that those Korenix switches are so cheap for what they are. But I'm a little confused about why they would make any positive difference. There isn't anything I saw on the company's website or manual that makes any kind of claims about the signal quality or lack of noise or interference in the signal. I guess that when you compared them to other switches you simply liked them better? Also, what is the point of having two of them? Thanks.

Isolation as they are industrial switches.