Ethernet Clocking


i had previously reported that adding an Antelope 10m rubidium clock to the Etherregen results in major tightening of soundstage and location of individual instruments. To my great surprise adding filtering on the BNC 75 Ohms connection between clock and Etherregen results in substantial additional benefits. The filter used is a Mini-Circuits BLP-10.7-75+ DCto11MHZ model.

We are only beginning to understand how to maintain clean clocking on digital connections, it is of paramount importance to SQ.

antigrunge2

Showing 3 responses by cindyment

@lmcmalo ,

I expect you would have achieved better results with a $70 USB isolator, a $100 secondary supply, and $50 cable, than the $400 cable, but that is just a guess.

It seems obvious to me that you understand Ethernet at an implementation level, and your comment about the $10 clock shows you have a good grasp of what it takes to make a DAC work.

Unfortunately, there is a lot of inertia in this hobby and I would expect most you will run into on this and similar forums, certainly the heavy posters, are 50+ if not 60+. They grew up with CD players and TOSLINK, back when jitter could be 3-5nsec, and there was no way to properly address it. Ditto for low tap upsampling, poorer on chip analog, synchronous USB, etc.  It's 2021, but the mindset is still from 1990ish. The problems that used to exist and have been long solved, are still being brought up like they exist and are just as substantial ... though some implementation appear to be recreating the problems of 1990. There is a whole portion of the industry that survives on keeping that mind set alive, hence you are fighting memory, inertia, and a motivated crowd working to discredit you, or at least people like you.

@antigrunge2 ,

Schitt is trying to sell you stuff. They didn't even have proper measurement tools till quite late. I have no hesitation based on that guessing I know more about clocking and what it does. Did you mean DCS?  Once they understood who I was they would say much different things to me than you.

Do you have any tube gear?

Your comment on DSP unfortunately makes your ability to participate effectively in this conversation difficult. Tubes, your speakers, reflections, sound absorbing, and any number of things create far more uncontrolled non linear "processing" than an ADC/DSP/DAC of some quality ever will.

One of the reasons I like and respect Nelson Pass is he makes no excuses or false explanations for purposely using non linearity (distortion}. Don't believe everything you are told. 

If you are working to achieve your goals using faith you may stumble on the target but it will be by luck. The results of our hobby are purely subjective preference but the underlying tenets are not and rejecting them because you don't believe them does not change that.

If I placed an ADC/DSP/DAC in your signal chain and you could not tell if it was there or not would you accept that you are currently wrong.