Les switchs audiophiles + ponts optiques

[Janacek]

(12-05-2019, 12:14 PM)zaurux a écrit : J'ai pas tout lu sur l'EtherRegen mais ce que j'ai vu, c'est qu'il n'apporte rien mais ne dégrade rien, donc est transparent.
C'est plutôt ce que l'on demande à ce type de composant.
Laisser passer le signal sans le modifier ??
Ceux qui pensent qu'il peut changer et améliorer les choses se trompent de produit.
Mais s'il dispatche les flux sans les modifier, c'est top !

Si tu lis un peu plus loin, amirm dit que dépenser 640$ pour ce switch qui n'apporte rien et qui ne résoudre aucun problème donne l'impression que Uptone est en train d'arnquer les acheteurs....
et encore plus dit que Uptone n'est pas réglementaire au niveau d'alimentation

amirm a écrit :As I guessed, they simply copied the markings of the OEM power supply yet put their own name on it. I am not sure that is compliant with FCC regulations as UpTone is not the one that applied for it and they have erased the name of the OEM that did.

The power supply is not the concern anyway. The real concern is whether the switch itself is FCC Certified. It clearly is not as the device itself has no such marking as required by the law. And Alex just waves his hands by saying "the emissions from EtherRegen are as low and lower than most off the shelf switch." Who says? You think you can give that answer to FCC to avoid a fine and shipment stoppage?

Anyone who has ever produced products that have gone through FCC certification knows what a grief this is. Frequently you fail the first test. You make tweaks and hope that it passes a second time. Sometimes that doesn't work either and you have to turn the design one more time.

You must have your device measured by a certified lab to know if it is compliant or not. If you have never run it as is the case with UpTone products, then you could very well be leaking RF like a sieve.

When I was waiting for the prototypes of the Geshelli Labs headphone amplifier, I was told they were going through FCC certification. Here is a two-person company and they went through the trouble of getting FCC certified. And for a device that hardly generates any high frequencies. Here is what Geshelli says on their website:

amirm a écrit :EtherRegen in sharp contrast has a ton of high-frequency and high power circuits running there. It has long tentacles in the form of Ethernet patch cables and power supply run that can bleed like there is no tomorrow. And we are to take what Alex says seriously? For a $640?

Gosh these guys paint a target on their back with such comments. The day they handed common sense Alex must have been absent. I mean if you don't have FCC/CE certification, why even bring that up and highlight it? Now people can quote that in their complaint to FCC and put him in serious jeopardy that he is knowingly violating the law.

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encore

amirm a écrit :Someone asked for multitone tests. Here is one with Schiit Modi 2 connected to my PC but with the test signal streamed from my NAS using Ethernet to the Roon player and then to Schiit Modi 2 USB DAC:



You can squint all you want and there won't be a difference. Modi 2 performance is of course awful with that raised noise floor especially in low frequencies. The EtherRegen did nothing to reduce that noise.

Let's switch back to Matrix i, this time the content streamed to it from Roon:



We are digging deep to whopping -130 dB yet cannot detect any difference between using EtherRegen Port B or without it.

So one of the worst DACs ever tested doesn't show a difference. And one of the best streamer/DACs out there doesn't show the difference.

The matching is incredibly tight with and without EtherRegen. The EtherRegen simply is not able to impact the sound waves coming out of the DAC.

You breath on the circuit and these measurements will show it. They are hugely more sensitive than any ear. Yet they can't detect electrons moving with less noise, jitter or fidelity.