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Meiko41 wrote:

Dear Romy, You said that PS Audio never acknowledged any sound problem with old PP. Did you ever identify something "technically wrong" in the sinewave that a PPP outputs that peoples from PS could work on ? May be I miss your report on that point but the only comment I can remember is that although the signal is very good (at least much better than a Purepower), it does not sound as you would like it to be.

Oh no, absolutely not. There was absolutely nothing "technically wrong" with the sinewave that a PS Audio Power Plant outputted. In fact the sine wave was exemplary, regardless the load I tried. The problem was with sound, with the fact that the Power Plant did not sound as good as “good sounding” generator shall sound.  You see, we are under impressions that bad sound come ONLY from the distortion of sinewave but it is not truly the case. BTW, I did encouraged Paul McGowan 4 years back when I first heard the PurePower to go class D but he refused as he felt (I think ) that this niche market was already taken. I was trying to convince him at that time that his Power Plants sonically way more inferior to PurePower PP1050 but he decided to be where he would like to be. Well, he has his full rights to do whatever makes him happy.

I think he was fool then and his is fooling himself now.  In a way it is good and bad thing that PS Audio did not move toward to class D generators years back. Good is in the fact that somebody keep putrefying the class A/B regenerators, who knows might be they come up with something good eventually. Bad is in the fact that PurePower has no competition neither in design, nor in Sound. To the best of my knowledge PurePower s the only company the offer class D audio regenerators. If we had 5 companies like PurePower competing for the same very small market then we would have much more exiting products with very rapid development-to-shelf cycle.

I think it is about money. PurePower is a small company that most likely adopted an existing UPS devise and tweaked it up to the point to make it suitable for audio needs. It is not designed from ground up for audio needs in my view and in view of some people with whom I consulted. Those UPS devised are design for cheap assembly and extremely confusing layout where all elements of the circuit sit atop of each other. When showed the PurePower layout to my engineers who deal with switching devises then they informed me that PurePower shall be 4 times smaller, must be completely differently arranged internally and shall out as stable sinewave as PPP goes. 

I very much not criticizing PurePower I just say that with absence of competition they can do whatever they want. If tomorrow APC , HP, Fluke or Tektronix with their billions dollars revenue and thousands good engineers on payroll who trains to deal with mission-critical systems would heir new CO who happen to be audio guy then those companies would come up with instrumental regenerator against which Paul McGowan would calibrate his distortion analyzer.

Again, we still do not know if we need all of it as we do not know who one power devise sound good and why another sound bad. We do know why in some cased the electricity is very bad for audio. We can predict what it will be bad. The problem that I am not sure that we can predict what electricity will be good for Sound. Something that PurePower does make it good. As I told before – I do not think that PurePower people know what it is…

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