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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: How to deal with PP2000 crosstalk.Posted by Romy the Cat on: 3/9/2011

Bill, when you were at my place I use two PP2000 running together as at that time I did not discover the effect. I was running my MF at -2dB and my tweeter at -1.5dB. As now I use one unit and I return back my MF and HF channels to the level as they has to be. The result is profound with substantial improvement of clarity and elegancy at upper range; in fact it is not how it uses to be in my Boston room. Properly reproduced HF need to be done by the efforts of signal, drivers and amps not but efforts of electricity. If you stop by again you recognize much more refine upper frequencies now with more discriminative colors.

I would not use cheater plug on PP2000. I did consulted with right people and I was explained that topologically those type of regenerators are a radioactive mess and if they do not have path to ground to damp this mess then all mess will be sitting at the regenerator’s chassis and it is very bad. It is not to mention that the input common mode filters much be grounded in order to be effective. Also, if one unit affects another unit then it is not over ground path but over the hot wire – it is very much visible on a scope.

I need to note that the fact the PP2000 returns a lot of noise back to the wall is not a problem at all – this is how a switching PS have to work. The problem I see is that another PP2000 looks like affected by this noise. I was a bit surprised that the influence of paralleled PP2000 is observable only at HF and it looks like it not affects bass. That is very strange as usually the lower bass must be affected. This lead me to think that it might be, juts might be, that the influence of one PP2000 to another takes place over air, as my PP2000 juts too close proximity to each other.

Tonight I will try to move PP2000 physically further from each and will see if it was the case. also, it might be possible that if I plug my second PP2000 further down the line (like other side of house on the in the same half “phase”) then it might be effective. For sure I need to research if ruining two units on opposite side of the 240V would be plausible.

The whole story is kind of poisoning the notion of use multiple PP2000 and I need to find some kind of resolution of this situation. Bill, you plug PP2000 into some kind of power conditioners, do those power conditioners effect sound themselves? I might eventually find some kind of filtration devise that will minimize the PP2000 crosstalk but will the negative contribution from such a devise offset the benefit of using multiple PP2000. I do not know at this point.

The Cat

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