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In Reply to: RE: Found the missing Ferrite bead: I can replicate your listening experience ! posted by hfavandepas on May 30, 2011 at 11:21:43
I tried a rather large ferrite core around the entire bundle of p24 and hardly noticed a difference. I did put other cores around power cords of my crossover/dac and juli@ 3.3 volt feeds and got a small bit of a sq change. Biggest change is still the p4 core. Don't understand why.
Edits: 05/31/11Follow Ups:
Went to an Electrical Parts store (RS Electronics in the US) and got some real huge ferite cores put 2 of them around p24 and another around p4 and that is more like it. Sounds less bright but yet more detailed and more space around all instruments.
Very smooth.
Hi Theo
I can’t wait until mine will be delivered.
According the track & trace service they will be delivered tomorrow
So I can start clamping.
Good too hear that you now have obtained better results on the P24.
The effect of clamping a ferrite bead on the linear (!) 12 V DC P4 line in my setup was rather big.
It was a real significant improvement.
I could hear the improvement immediately.
No long listening sessions needed for that.
As you also already wrote: I have no explanation either for the significant SQ improvement.
I know that ferrite beads ‘filter’(present high resistance for) high frequency’s.
And I also expected that lowering HF noise levels would increase SQ
But what is exactly happening here, I don’t know.
Is the ferrite bead blocking HF noise coming from the MoBo onto the P4 line?
Or vice versa? Is my linear psu producing HF noise which is blocked by the ferrite?
What is exactly happing here that is causing the SQ improvement?
Anyway, it works very well !!
Untill now at least.
The total DC current in the P24 is high. Around 3.5 – 3.8 amps
Reading the ‘Steward’ article, that is much current to apply ferrites on.
Steward proudly presents in that article, that some of there ferrites can handle 4500 mili amps (4.5 amps) and still keep functioning without saturation or so.
So I will follow Bibo’s advice and remove them after 3 weeks, too check if the ferrites are still effective.
Can you provide a link or name or partnumber or model of which type of the ferrite beads that you are using?
Mark
fully optimized cMP2 PC -> ESI Juli@ -> Van den Hul Optocoupler MkII-> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
No part number. The ferrite is about an inch long and a half inch square at the end (this includes the white clamp). It all but fits the p24 bundle so I taped it it to be secure. Place from which I bought it only offers this one brand/style so I'll go back and buy the rest and find out their source.
Hope that helps.
Its 28A2029-0A0 2 pc ferrite bead w/nylon case mfg by Stewart.
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