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In Reply to: RE: Thank you for feedback. Are you sure you don't want too experiment with caps + ferrits? (last try) posted by theob on June 30, 2011 at 09:39:07
Hi Theo,
‘not recommended’ Well, I don’t dare too do any recommendations.
I’m no expert nor educated or work in digital audio electronics, I was more of thinking out loud.
But if it works, than it works.
I trust your equipment and ears.
I only wonder where that noise is coming from.
That is why I thought about fighting that noise at some other place.
Although I don’t have any clue where too look else.
For the S/Pdif specs I just googled and I found them quickly.
This was what google presented too me as first link.
http://www.epanorama.net/documents/audio/spdif.html
Mark
fully optimized cMP2 PC -> ESI Juli@ -> Van den Hul Optocoupler MkII-> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
Follow Ups:
Based on your comments I took out the spdif ferrites and listened and I prefer them in by a wide margin. Interestingly I tried listening @ 192 sample rate and with ferrites it seems dull and missing info but not @ 44 sr.
Anyway these ferrites are something special in audio pc's. What I don't understand is the original thread from AA that you referenced in your original post on ferrites. Most posters there said it was not recommended to use ferrites period. I guess not knowing any better in these eletrical pc things I just have to try everything.
Hi Theo,
That thread was about putting them on digital lines that transport usb and/or spdif signals.
So I fully agree not putting them on these digital lines unless there is a very very dirty component on either side that might throw extra additional HF dirt into the data line.
But that thread made me aware of that i also see them sometimes power lines (my dell switching loader, some wallwarts, ect) I suddenly realized that may be ferrites might possibly also work on the power lines comming from the ATX.
Mark
fully optimized cMP2 PC -> ESI Juli@ -> Van den Hul Optocoupler MkII-> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
Hey Mark,
I think that is why power cords can make a big difference depending on how they handle emi.
Some manufactures agree i think and when I was fitting my dirty supply for ferrites I noticed that there was already a big one built into the psu. Here is a link to the review and on the sixth picture down you can see the ferite. There is as much sticking out as there is inside the case. Might be why I liked this psu.
No one here remembers the bending of our minds
Hi Dawnrazor,
Thank you for this.
I already was interested for quite a while in ways too filter the output of a switching ATX PSU for my cMP setup. But using a classic filter concept containing a combination of chokes and caps is very hard too calculate. Big chance one will end up with a filter that rings/resonates.
Fortunately I red that the chance of ringing is much less when a combination of ferrites and caps is used. However there still is a chance of ringing/resonance, it is much less and much easier too control.
As ferrites are lossy components the needed calculations are also somewhat lossy. A rough approximation is enough. At least: this is what I roughly understand from articles on the net from TI, Alterra, Analog Devices, EMAC and others.
I see it is an Enermax PSU.
RME used too recommend Enermax PSU’s on there website until some years ago.
When RME changed their website these recommendations didn’t re-appear on their new website.
So I think its not a bad choice at all.
Mark
N.B. Also XP optimizations tips did not re-appear on the new RME website.
I still use one of RME’s XP registry tips too disable CD-rom ‘polling’/ autostart in registry.
fully optimized cMP2 PC -> ESI Juli@ -> Van den Hul Optocoupler MkII-> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
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