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Romy the Cat wrote:

A few post above Bill mentioned that he run his PP2000 from AdeptResponse power conditioner.  I am not familiar if AdeptResponse helps to separate one PP2000 effect another. I am not also familiar with AdeptResponse itself. Looking it up it appears that AdeptResponse is nothing but peter power resepticals with shunting caps – a BS in other words. The idea to have shunting caps across AC line is multiple times was discussed by me. I am a big opponent of any shunting capacitor son AC line and transformer primary. If you remember I was experimenting running caps on the PP2000 output and reported that 1.5uF do lower noise and do destroy bass. Whatever capacitance I use in primary do improve measurement and destroy sound, so I never use it. To use the caps BEFORE the PP2000 however might be another animal. I do not remember I was trying it as there was no reason to do it, now there is. I will be experimenting with loading the supply side of PP2000 with caps. I am sure it will reduce the PP2000 crosstalk but will it impact sound negatively – this is the question.

First of all let see what we are dealing with. Below are 3 images.

1)      External power line with one PP2000 loaded at 75% plug in.

2)      The same power line with second PP2000 plugged in

3)      The same power line shunted with 100uF cap with second PP2000 plugged in.

As you see the second PP2000 does crap the power line. It itself is not a big deal and there is absolutely nothing visible on the fist of second PP2000 output. Still, it is visible objective change, and you can see that 100uF cap does cure all problems. I use file Ansar cap 100uP 630V. The cap is silent what I plug in power line with one PP2000 running but as soon I play other one then it begin to have a lot of HF noise, I mean the cap has HF mechanical noise in it. I need to say that I run everything from the single power receptacle with second PP2000 connected to the same power receptacle of to a dedicated power line that run from my main 200A panel on the same “phase”. The result of the nose penetration from one PP2000 to another was identical. I did not run my two PP2000 from different sided of 240V and I have reason to feel that it is not right application.

I need to note that in electricity whatever we see on the scope has mostly very little relation to the actual sound and I invert very little in measurements in electricity as I do not know what to measure.

Now. How it all Sounds.

1)      On the first picture - single New Production PP2000 was use and all system was plagued into it, not all was on however. “On” were juts 2 DACs, PS, transport, preamps, 2 Milqs and bass amp – 75% of full load. The PP2000 was as I said “new production” or the one that was send to me last November and then was fixed. Sorry, in case of Pure Power I do divide the products by vintages as they apparently to sound different. My init has 100.000mF caps added to shunt the internal buttery, there is nothing else is doe to this unit. The sound from this PP2000 is nothing short of spectacular.  I can; not stress enough how good it is, in fact, if it worth anything to you – electricity-wise, I am having the best sound I had. It is not sound as great as during the “super electricity days” but I have a very stable be and very predictable base sound of my electricity. Very very good. If I have the same sound from the rest of my PP2000 unit then I’ll hit the jackpot.

2)      On the second picture the second PP2000 begin to crap to the first one. It sound exactly as I described: too aggressive HF, some upper MF compression and zippy sound. I find it unusable. I do admit that it will be many people out there who will find this zippiness as some kind definition of “quality”. Thos people would be idiots in my book. 

3)      I did not make any listening in the setting as presented at the third picture. I however did very careful listening with second PP2000 off and first PP2000 running with and without 100uf cap BEFORE the unit. To my great displeasure the presence of the caps BEFORE the regenerator was very clearly auditable – I was instantly has much more dry bass and amusical bass with the cap. So, the use of extra cap BEFORE PP2000 I found is very bad idea and not useable to decuple one PP2000 from another.

Saying all of it I have to presume that change brand and quality of the capacitor before PP2000 input might make a difference. I did NOT experiment with this. I personally thought to remove the PP2000 original input filters, to keep no caps AC line. It also might be that the 100uF is too much and something like 10uF would do the decuple duty and will not fuck up Sound. For me it was important to see if conceptually the problem with sound deriving from capacitance on AC side would be transparent through the entire PP2000. It does and this set a lot of restrictions.

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