USB versus Ethernet - a study reveals the winner

[toetapaudio]

It is a Japanese Telegaertner M12 Gold Switch.
"Gigabit Ethernet compatible switching hub for network / audio
Improve signal quality by adopting fully shielded circle connector (M12 X code) to shut out extraneous noise ?
Cut the influence of heavy bass vibration from the speaker"
https://translate.google.co.id/tran....phileweb.com/news/audio/201701/30/18293.html

Better than Aqvox switch, I presume? At ¥320,000 it should be, it’s 4x the price.

 

[Empirical Audio]

Ok Steve.
I have a multimeter with which measured the bias of my previous AR Ref 150. Could you explain how to know if that negative pole is connected to earth?

Plug in the AC to the linear power supply.

Set your multimeter to ohms setting, minimum setting.

Touch the AC outlet ground hole with one lead of the multimeter and the outer barrel of the DC connector with the other lead. Multimeter should read ~0 ohms.

Steve N.
Empirical Audio

 

[nonesup]

Ok, thanks for your explanation.
Unfortunately, the negative pole is not connected to ground.

 

[Empirical Audio]

Ok, thanks for your explanation.
Unfortunately, the negative pole is not connected to ground.

You could connect the ground of the DC connector using this:

https://www.ebay.com/itm/DC-Power-Splitter-Cable-Cord-Adapter-1-Female-to-2-Male-CCTV-Security-Camera-DVR/141609260517?epid=1460784488&hash=item20f891d5e5:g:nnAAAOSwehVakXt5

or

https://www.ebay.com/itm/12v-DC-1-to-2-Power-Splitter-Adapter-Cable-for-CCTV-Camera-5-5x2-1mm-female-male/162601585346?hash=item25dbcf4ac2:g:qkoAAOSwh3NZiM0a

Just put this inline with the connector to make an extension. One of the DC plugs will hang loose.

Then get a piece of stranded wire from Home depot and put a banana plug or just fold back the wires and push it into the outlet ground hole. Then take the other end of the wire and wrap it around the loose connector barrel.

Steve N.

 

[nonesup]

Thanks, I will do it

 

[Empirical Audio]

Thanks, I will do it

The easy way to connect to the barrel of the DC connector is using a:

Power Distribution Block, 1 pole. Just put the barrel into the large hole and tighten the screw and put your wire into one of the smaller holes and tighten the screw.

https://www.ebay.com/itm/Marathon-1431553-Power-Distribution-Block-1-Pole-335-Amp-1-In-6-Out/222272171596?epid=1311889215&hash=item33c0742e4c:g:1k4AAOSwPCVX9Vkk

https://www.ebay.com/itm/Ilsco-PDB-16-2-0-1-Power-Distribution-Block-1-Pole-175A-175-Amps-600-Volts/122978417734?epid=1500090120&hash=item1ca215bc46:g:uy0AAOSwQiFaZJ8R

https://www.ebay.com/itm/FERRAZ-SHAWMUT-POWER-DISTRIBUTION-BLOCK-63161-1-POLE-600V/301774184941?epid=1511860749&hash=item464324a1ed:g:nLwAAOSwhcJWJ6HG

Good luck!
Steve N.
Empirical Audio

 

[nonesup]

Well, I had thought of a female connector of this type

 

[Empirical Audio]

Well, I had thought of a female connector of this type
View attachment 38879

You would have to connect the two adapters with two wires and then a third wire to the grounded outlet. Small wires too. I recommend 12 gauge stranded for the wire. The block is a better solution.

Steve N.

 

[nonesup]

Well, I was referring to using only the female connector on the left, which would be connected to one of the two male connectors on the splitter. This female connector, would only have the twisted pair cable, which at the other end, would connect to the ground connector of the wall

 

[Jeffy]

Nonesup the easiest way to do this is to take a screw out of your local switch, which I asume is a metal case. Take a small ring spade that has a place to solder a wire too. Screw your screw back with the ring spade to the case. The end of the wire can now have the soldered bananna plug that goes right to the outlet ground. I lucked out because one of my power cords has a cheater plug on it. I shaved the metal down on the cheater plug so I could reverse the phase of the plug. I can now easily plug the banana to the wall outlet without any problems.

 

[Marcin_gps]

Better than Aqvox switch, I presume? At ¥320,000 it should be, it’s 4x the price.

It's more than a tweak.

 

[Kingsrule]

It's more than a tweak.

Marcin

U should sell these and I'll guess your price will be a lot less ....

 

[Marcin_gps]

Marcin

U should sell these and I'll guess your price will be a lot less ....

I will very shortly, but at even a higher price unfortunately. Japanese equipment is always cheaper in Japan compared to the rest of the world.

BR,
Marcin

 

[Empirical Audio]

Well, I was referring to using only the female connector on the left, which would be connected to one of the two male connectors on the splitter. This female connector, would only have the twisted pair cable, which at the other end, would connect to the ground connector of the wall

That will work, as long as the hole for the wire is big enough. I have regulators that use these same green blocks. The holes are fairly small.

Steve N.
Empirical Audio

 

[Empirical Audio]

Nonesup the easiest way to do this is to take a screw out of your local switch, which I asume is a metal case. Take a small ring spade that has a place to solder a wire too. Screw your screw back with the ring spade to the case. The end of the wire can now have the soldered bananna plug that goes right to the outlet ground. I lucked out because one of my power cords has a cheater plug on it. I shaved the metal down on the cheater plug so I could reverse the phase of the plug. I can now easily plug the banana to the wall outlet without any problems.

This assumes that DC common is already tied to earth ground. It may not be. best to check with an ohmmeter.

Steve N.
Empirical Audio

 

[marty]

Anything get's old & boring when it becomes a never ending series of trials even dating beautiful women; at some point we need achievements!

david

Hmmm, isn't that basically what Trump said in his Access Hollywood tape?

 

[nonesup]

Well I have already received by mail the necessary to put the negative connector that enters the switch with ground.
To test it, I removed the Entreq cable with RJ45 connector from the switch, so that the swtich remained without any type of ground connection.
I heard in these conditions the first movement of the quartet of string MWV R18 of Mendelssohn in the performance of Melos Quartett and recorded by DG. It is a recording with a brilliant sound, which can become annoying.
When I connected the ground wire to the negative pole of the connector, I noticed a larger body in the music and decreased brightness.
I withdrew this connection and went back to listening without connection to ground.
After a while I connected the Entreq cable with RJ45 connector to the Switch and its Entreq Silver Minimus box (in a few days the connection will be to a Poseidon) and it happened again the same as when I connected the first cable described above. This means that the Entreq box was already doing a good job.
Then I also connected the wire that gives ground to the negative connector that is introduced in the switch and then there was an additional improvement in musicality and reduction of the digital stress.
This is how I like my system and how it has finally been.

 

[jkeny]

No, the OR6 uses XMOS and the design is galvanically isolated, with the Master Clock on the isolated side. Driver only needed for PC.

Unfortunately, this type of isolation is just not optimal. The optimal stage for galvanic isolation is on the incoming USB signal, not after the USB receiver. And this means the D+/D- USB signal lines, not the ground in my devices, anyway. Exactly why, I'm not fully sure but my experiments with both types of isolation firmly established the sound quality improvements in this USB isolation - see the TNT audio review & a further upcoming April review.

Currently an ISO-DAC (which is the first DAC to contain this optimal USB isolation internally) is on tour in the UK via Pinkfishmedia forum

 

[Empirical Audio]

Well I have already received by mail the necessary to put the negative connector that enters the switch with ground.
To test it, I removed the Entreq cable with RJ45 connector from the switch, so that the swtich remained without any type of ground connection.
I heard in these conditions the first movement of the quartet of string MWV R18 of Mendelssohn in the performance of Melos Quartett and recorded by DG. It is a recording with a brilliant sound, which can become annoying.
When I connected the ground wire to the negative pole of the connector, I noticed a larger body in the music and decreased brightness.
I withdrew this connection and went back to listening without connection to ground.
After a while I connected the Entreq cable with RJ45 connector to the Switch and its Entreq Silver Minimus box (in a few days the connection will be to a Poseidon) and it happened again the same as when I connected the first cable described above. This means that the Entreq box was already doing a good job.
Then I also connected the wire that gives ground to the negative connector that is introduced in the switch and then there was an additional improvement in musicality and reduction of the digital stress.
This is how I like my system and how it has finally been.
View attachment 39141

Do you also have an isolator in the Ethernet cable from switch to your DAC? I prefer the EMO EN-70e. Very inexpensive at $130. This makes a big difference in addition to earth grounding the negative of the DC power to the switch.

BTW, try using Minimserver with Linn Kinsky for playback on a PC or Mac if your Ethernet renderer is UPnP compatible. I have found this combo to be the most live compared to Jriver or Twonky. The combination of Minimserver, grounded switch/router and the EMO isolator is magic. Take any of them out and you lose the magic.

Steve N.
Empirical Audio

 

[Al M.]

And the complications and convoluted drama of computer audio just go on and on.

At least all this is an entertaining read as long as I don't have to get into the weeds myself. I'll continue to happily spin my CDs, free of worries.