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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Amir, a few things…Posted by Romy the Cat on: 8/5/2019
First of all, if you have multiple of PP3000 then be advices that them connected in parallel substantially descries sound quality for each of them. Then might be use ONLY at different phases of some measures should be taken to decuple them by other means.
 Amir wrote:
the interesting thing is Pure Power 3000+ Sensitivity to AC quality. when the AC is good then the Pure Power has very smooth sound with great transparency and when the AC is not good the Pure Power 3000+ has less transparent sound with a-little (very minor) harsh sound. 
   
How methodologically you distinct the contribution to sound the come from regenerator vs the nastiness that come from power lines? I mean when the elasticity is very bad and you have the reported “harsh sound” then I presume that this harsh sound is caused by bad electricity. You feel that “Pure Power 3000+ has less transparent sound … harsh sound”, so why do you feel that it is the PP3000 the one that has less transparent sound if the harshness comes from power lines?  Did you developed any techniques to differentiate the PP3000’s own harsh sound from power lines harsh sound?
 Amir wrote:
I have used two Pure Power 3000+ in series but the result was not good. 

You absolutely should not do it. The topology of the digital regenerators like PP make them unstable and in fact dangers to be connected in series. The PP should warn the customers against doing it and in fact drop any warranties if somebody insist to use PP in this configuration. Hypothetically it is possible to use PP in series with an insolation transformer between them but then the measures should be taken to decuple then via ground, which brings own bad of the problems. Anyhow, I do recommend if you are not familiar with topological idiosyncrasies of series connecting of switched power supplies then do not connect PP in series.

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