Romazicon, it is true that the magnetic permeation from the previous magnetic power cord should shorten that aspect of break in. I think it will start out sounding better than if a no magnetic pc was used before.
However, I believe that there are other factors of break-in that will take some time to arrive the most refined sound. You should enjoy the new power cord very soon and also get more as time goes by.
As far as what Pro piece has the greatest effect. I cannot say at this point as my speaker cables have under 100 hours on them and I do not think they are totally dialed in for 600 hours. Both PRO pieces improve the sound greatly in different areas of the process, so while they improve things is differently, the effects are simular . I'm impressed with the musical changes brought on by power improvements and the pro has like 6 times the magnets of the URH pc. It seems to me that each improvement in any magnetic part brings better highs and lows, quieter background, more "real" and involving, more refined sound. As one would expect, the PRO series is a much bigger increase than previous levels. It appears that The PRO's have more that four times the magnets
which is a much bigger jump in magnet size than previous upgrades.
I think the PRO's started out as a "what If". What if we put an absurd amount of magnets in a power cord? speaker cable?
I think even HFC is surprised at the amount of sales on these unobtainables.
I went with a Pro PC first because it was less money than the Speaker cables and I though, at the time, that power cords made a bigger improvement than speaker cables. I think this is true with models before the PRO but the Pro's are a different animal. I'm still deciding which is best but enjoying music more than ever.
My new speaker cables are refining nicely!
