I did try the ferrite clamp idea, but it was not as significant as the PC treatment by a long way - but potentially beneficial. With the purple XLO I found there was no meaningful advantage to the clamps.
I have a pair of NBS cables that I ran for years on my Soundlabs and just recently replaced them with an upgraded NBS. They were substantialy better than the stock power cords, fuller sound, lowered noise floor, better dynamics and more resolution. E mail me and I'll make you a good deal on the older NBS.
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