OK so I finally succumbed to Ferrite frenzy and popped off to Mouser to buy 10 Wurth 74271633S Ferrites. Duly got home and attached them to the dual coax leads, 5 on each, and thought What.
Soundstage collapsed dramatically and so much grain it was like listening through sand or an MP3 file, take your pick but sound was not good at all.
Not sure why this went so pear shaped, after reading all the posts about RFI and how we can't possibly be hearing what M Scaler can do without the little beasts attached to every piece of equipment, well I was at least expecting a small positive.
So off came said little beasts and restored was my music to its original and enjoyable form. To be fair I have not played around with placement or numbers, but as a first trial, well I have no idea what all the fuss is about and cannot for life of me work out how I could be doing this wrong, have cable, have ferrite, will clip, job done.
If anyone can shed any light or have any suggestions.
I would try either optical into your DAC directly, or optical in to M-Scaler and Optical in to DAC. While this won't give you the full benefit of the M-Scaler experience, it will at least provide you with a tone that has removed the vast amount of RFI.
If it sounds closer to this from a tonal standpoint, you are doing it right. If not, the ferrites are having some type of negative effect on sound quality.
In my experience, the removal of distortions (either intermodulation or other distortions) can sometimes MASK grain. Sometimes the sound can be initially appealing, but it almost always leads to fatigue with me (or sonic congestion). That's why I suggest you compare it to an optically isolated signal path. You'll be able to determine if you are objectively removing RFI or adding to it. Then you can decide what you want to try in terms of the aftermarket options available.