I separated my two of my PP2000 in my rack with 3 feet space and run everything from one PP2000 and both Milq power amps from another PP2000. I also routed the incoming power cords that that are far from each other and far from outcoming power cords. Each of incoming power cord is loaded with 3 large ferrite chokes. It looks like in this setting the things work. Whatever sound I have I do not feel tempered to roll of my tweeter for a 2-3dB and my MF for 1dB.  The Sound is pretty much as feel it has to be.

It looks like the problem of multiple PP2000 is resolved, BTW, both PP2000 are plugged in the very same wall outlet. The PP2000 that a drives Milqs is load with 50% and the PP2000 that runs front end with 40%. Another day when I have mood I will measure PP2000’s outputs in this configuration and will sniff with EMI sensor, trying to find out where and how  stray noise is coming out of PP2000 box. It looks like I have no use for my third PP2000 as I have no room to put it far from the rest PP2000 and in functional proximity to what it needs to drive. Perhaps I will find a configuration with three PP2000 units but I need to answer the main question of this experiment.

The main question of this experiment is following: does multiple PP2000 unit provide any sonic improvement over one single unit (considering that I can driver the whole system from one unit) . I do not have the answer to this question.  I do not have feeling to do the critical listening today. I will of cause as time come by. As today my sentiment is that two PP2000 sound a bit more dynamic then one, perhaps no dynamic but louder during load passages. This is very premature and I am sure my opinion will change 2509852 times during next few days/weeks… I will do more or final evaluations when I have my ULF amp with passive line-level filters back into duty.

A few words in the end of this little saga (do not worry more saga will come).The folk who follow this thread are witnesses all my ups and downs with PP2000, including the major fuck up that PurePower had in the end last year with new revision of PP2000. The question that a few folks asked at this site was why I demonstrate so much perseverance trying again and again to use PP2000 and trying to get the best out of it. The answer is ridiculously simple –Sound. When PP2000 properly operates and playback is organized with respect to sonic advantages that PP2000 offers than Sound is spectacular, truly is.  If I insist that I do not see my playback without using PP2000 then I do it not because I am trying to sell you PP2000 as some simpletons might feel.  In my view PP2000, although is does help with electricity (not completely)m but in reality it is not just a power treating devise  but rather a power sourer that makes audio to sound better. I very much like and in a way am addicted to the sonic contribution that PP2000 has. I consider it the sonic contribution in very proper direction.   I still do not attribute sonic benefits that PP2000 offers to PurePower as a company.   I do feel that sound of PurePower generators is an accident, happy accident and I am glad to be a part of it.

I made first set of test with one PP2000 vs. two PP2000 driving my enter playback. All grounds were lifted on the load side. The presence of second PP2000 did not made sound bright as before, the second PP2000 sits sufficiently far from the first one.

Starting from the convulsion: I like when my playback is driven from one single PP2000. I will make more experiment of course but as now is what I’m witnessing. This configuration with single PP2000 has a number of Sonic advantages. Let me I explain them.

Two PP2000 sound louder at louder passages, they truly do. However this loudness comes with a toll – it introduces generic, nonspecific volume intensity instead of the loudness of my sound. My playback has very subtle and delicate texture, something that I value tremendously. This texture is not “resolution” but rather ability to react to very fine tonal and contrast fluctuations while holding other sonic characteristics unaffected. I hardly ever seen this texture at other playbacks, it is in a way my invention and the way how my playback manages this texture is imperative for me. With one PP2000 the scale of my texture rises proportionally to the volume of Sound. In fact I feel that in my playback it is possible only while PP2000 is being used.  With two PP2000 the volume rises but my texture lagging behind. To a degree it feels like at loaders passages there is not enough color discrimination and subtleties dynamic contrasts got substituted with just high dynamic pressure. It does feel loader but it does not feel right to me.

There are some other sonic moments that I like with single PP2000, but in context of my multi-amp/multi-channel sisals I feel that I can mitigate them as they are static. The above-described problem with de-texturing and de-colorization of tine at high dynamic levels is not something that I can moderate with static setting neither with Macondo nor with Melquiades.

I return my playback powering everything from a single PP2000 and this problem does not manifest itself.

What does it mean? I do not know. Perhaps I need to play with grounds or with something else and find a way to make two PP2000 to sound like one. I do not know what kind tools are available for me to do so. I generally can stick with one unit but my single PP2000 does not drive my entire playback. Having my entire playback on without Pacific I have 99% load at my PP2000 and if I would like to turn Pacific on then I need ether shut down ether Schwartz or Phonostage.  Certainty it is not a big deal but I would rather to have two PP2000 loaded at 50% then one PP2000 load at 100%. Do not forget that I have amp that drives ULF is operating in class A/B. I do not want the PP2000 dive into sort bypass each time when orchestra goes fortissimo.

Let see how it goes. It would help if I knew what in electricity of two PP2000 might be responsible for what I describe?  I wonder: are my multiple PP2000 in phase?  Do they need to be in phase? I have no idea. If you read from me about the time-aliment of power regenerators and a need to synchronize the multiple  PP2000’s internal clocks then  at least you will understand how I end up to think about this silliness….

I do not participate in most forums, but I do follow conversations for information on equipment, configurations and the experience of ordinary buyers with the companies that make and sell our equipment.  Magazine reviewers always seem to have the company CEO toe-in their speakers!

I came to GoodSound when I was looking at power products, and followed many of the discussions about PurePower.  When I thought about moving to Europe from the US I contacted PurePower and had an exchange of emails about US and European compatibility etc.  I went with a different US solution at that time.  I came to Europe about 10 months ago and, despite the vastly superior power situation here than in Los Angeles, I looked again at different solutions.  I tried to buy a different product here, but I was never able to complete the deal - it seems that European distribution of US products is just awful when combined with the general absence of any notion of client-service in Europe.

I then tried to purchase a PurePower 1050i.  The European distributor had two available at a discount (I gathered later that they were flushing old stock) and I ordered one.  It took three weeks to do just that - the man was a terrible communicator.  

The unit arrived, eventually, after a month.  On plugging it in, the display immediately went to FAULT!!!.  The unit passed a current to my equipment (at that point just a lamp as a precaution), but the display was clear, even when restarted.  I asked if there was anything I should do before returning it.  After one week of fruitless back and forth I stated that I wanted to return the unit as I no longer had confidence in the product or the company.  No reply for five days until I sent another email demanding a response with a read receipt.

At that point the US Sales Director got involved who immediately relayed to me the wonderful accolades that a recent customer in Scotland had sent.  He ended with:  PurePower is the real deal, worth a little bit of hassle for what it does.  I guess that is why he is head of sales!  He won, I wanted the unit after all, so I tried to work with a technical guy in Canada.  The result was Fault!!!

It took ten days before I got a response from the USA that he would get the European to arrange for a return.  It is now 16 weeks later.  The unit was returned only five weeks ago, and I heard nothing back from Europe or the US.  I sent an ultimatum last week that I would put the matter in the hands of an attorney if I did not receive a confirmation of payment by the end of today.  The Head of Sales read it, but never responded.  The European distributor responded with a promise to make the payment.  Today I notified them that they had missed the deadline and immediately received a response that the payment was sent and they could fax me the slip.  That was followed by an email saying that the payment failed, despite them having my international payment instructions since December.

A long story.  I am contributing this because I would have wanted to read it when I was looking into PurePower.  I cannot say anything about the product, because I never got there - the company failed.  Easy to say that it is tricky dealing with distributors in Europe etc etc.  This involved the Head of Sales and the European distributor with Purelink.de as the web address, not some small part-time country rep.  At no point has the company or its people come though and cleaned up a small problem.  The company has failed to be the "real deal" or even a workable deal.  I am currently out one power system, the German Sales Tax plus Swiss Import Tax plus the purchase of the unit.

I would recommend to everyone that they think long and hard before buying from PurePower, no matter what the product is like or how much attention the company favorites receive.  I have no financial interest, professional or personal relationship with PurePower, its competitors or any other party in the audio industry or media.  I am just a guy who loves music and tries to take care of his gear.  I intend to post the same message on any other forum that I read about PurePower.

• 2 - JL Audio F113 subwoofers
• 2 - Wyred4Sound SX-1000 Mono amps (class D)
• 1 - Wyred4Sound SX-500 Mono amp (class D)
• 1 - Wyred4Sound MMC-5 five channel amp (class D)
• 1 - Denon AVP-A1 processor
• 1 - Prima Lunda Dialoge 3 Tube Preamp
• 1 - Apple Mac Mini
• 1 - Sony PS3
• 1 - DirecTV DVR HR-24
• 1 - Samsung Blu Ray Player
• 1 - Wyred4Sound DAC-2
• miscellaneous - ethernet switch, hard drive, Harmony RF extender

thrang wrote:

the capability of a PurePower 2000 for the components I have? I'm thinking of purchasing one...  Given the peak output performance of the 2000, I'm thinking I can connected all of the following  2 - JL Audio F113 subwoofers 2 - Wyred4Sound SX-1000 Mono amps (class D) 1 - Wyred4Sound SX-500 Mono amp (class D) 1 - Wyred4Sound MMC-5 five channel amp (class D) 1 - Denon AVP-A1 processor 1 - Prima Lunda Dialoge 3 Tube Preamp 1 - Apple Mac Mini 1 - Sony PS3 1 - DirecTV DVR HR-24 1 - Samsung Blu Ray Player 1 - Wyred4Sound DAC-2 miscellaneous - ethernet switch, hard drive, Harmony RF extender Wyred4Sound said the only thing to ask from their perspective is if the 2000 handles high capacitance loads well, which I guess their amps present - I don't know what that means, as my knowledge of electricity culminates with not putting your finger in a socket.

I do not know if you will be able to get any prediction of the PP2000 benefits in respect to your playback. To “handles high capacitance loads” is not the problem for PP2000 as far as I saw. The thing that you need consider, aside from normal sonic considerations, is the fact that your Wyred4Sound switching amps have most likely switching power supplies. When a switching power sources drives another switching power supplies then it leads to very dramatic dropping of power. It might be not a big deal for you but it might important. Anyhow, take those questions to Wyred4Sound and to PurePower.

thrang wrote:

I will take what you've posted back to Purepower/Wyred. Excure my ignorance, but are you saying the manner in which the Wyred's draw power might, in higher volume listening scenarios, exceed the capacity of the 2000? Or by dropping of power, what exactly are you referring to? The amps inabilty to produce it's rated power?

joaco wrote:

... this last time ive been doing some "ear" experiments and trying different setups of filtering . Just a question regarding a phenomena that im having , ive tried some ups/on-line regenerators and I think they tend to "smooth" all music but they do not tend to have a positive effect on dynamics , im recently trying a galvanic isolator transformer wired resembling "balanced" . This has no major effect on smoothing the music , but it tends to give "brutal" dynamics and lots of detail . Well my question is , Romy or other , do you feel pp2000 or other solution tend to increase dynamic in that way and also add the "smoothing"  ?

Romy the Cat wrote:

joaco wrote: ... this last time ive been doing some "ear" experiments and trying different setups of filtering . Just a question regarding a phenomena that im having , ive tried some ups/on-line regenerators and I think they tend to "smooth" all music but they do not tend to have a positive effect on dynamics , im recently trying a galvanic isolator transformer wired resembling "balanced" . This has no major effect on smoothing the music , but it tends to give "brutal" dynamics and lots of detail . Well my question is , Romy or other , do you feel pp2000 or other solution tend to increase dynamic in that way and also add the "smoothing"  ?  Joaco, can you elaborate of this "brutal" dynamics.  Do not know what you mean and I do not know if you recognize it as positive or negative effect. Also it would help me to understand what you are talking about if you describe in context of what specific recording you feel the dynamics turns to be brutal. The Cat

• 2-channel: PrimaLuna ProLogue Classic integrated tube amp (Class A/B, 2×40W max.), Thorens TD-350 turntable (12W), Audio-GD Reference 7.1 DAC (Class A, 38W), Oppo 83SE universal player (35W), Squeezebox Touch net streamer (3W)
  
• Multi-channel: Pioneer SC-LX82 7.1-ch. AVR (Class D, 190W max.), Monitor Audio RSW12 powered sub (Class D, 500W avg.), Oppo 83SE, Panasonic Viera TX-P46GT30 TV (165W avg.)

Byzantine Empire  and PurePower.

spytsi wrote:

Everybody here remembers that Romy's initial acquaintance with PP products was through model 1050; at some later point he upgraded to model 2000. Since then quite a few user opinions appeared on this thread to discuss how did the PP1050 develop over the years. Where there any PP1050 users to also experience buzzing or humming of any kind? Did the —seemingly problematic— revision/upgrade for PP2000 during late 2010 also affect the sonic behavior of revised/upgraded PP1050 units in a similar manner? Were there any PP1050 users that at some point experienced similar sound from their newly purchased units, performing significantly better when running on battery than on AC regeneration mode? Any feedback on model PP3000, introduced during late 2010? It would be interesting to know, especially from thread readers that might have not yet posted their experience with PP1050 or PP3000.

spytsi wrote:

On a side note: what does the labeling of PP models (following their 4-digit number code) stand for? Maybe "i" for international (120V), "hv" for high voltage (230V)?

spytsi wrote:

Romy, since you are the person who discussed extensively with the manufacturers the imperative need to deal with the problems encountered on their revised PP2000 units (Nov-Dec 2010), did they recognize the need to apply this (hardware?) treatment for this bug on their entire product line (1050, 3000, both i & hv), or just on the 2000i/hv devices? Apart from implementing this treatment on their product line prospectively, did they also happen to do so retrospectively = did they fix all already stocked late-2010 PP units before being sold to customers?

spytsi wrote:

Do you think PP1050 will suffice for my needs (especially during multi-channel playback at nearly-max load), or should I opt for PP2000? I'd like to note that both systems are almost completed and no major upgrades are planned for at least the next 5 years.

spytsi wrote:

PP1050hv has 4 schuko receptacles; 3 of them will be occupied by the 2 amps and power sub; all the other devices can be hooked on the 4th receptacle through a BlackNoise audio-grade power strip, or alternatively hook them on PP1050 through a power filtering device (Belkin Power Console PureAV PF50). Which solution of the two appears as more solid? Can PF50 be fed by PP1050 without any electrical or sonic "side-effects" to either device? On a theoretical basis, is it a good or a bad idea to insert a filter between PP1050 and my source/DAC/TT? I mean, could PF50 filtering cancel all the benefits of running my source/DAC/TT on regenerated power? Alternatively, what about chaining the two devices the opposite way: use the PF50 filter to power PP1050? I guess that's similar to feeding PP2000 through the AdeptResponse units recently discussed here. Or would it be preferable to use a Kemp balanced isolator source to feed PP? BTW, can regenerators run on balanced AC?

I do not know, spytsi. On a theoretical basis it might be a good idea to put some kind of filtration to an isolated load that runs from PurePower but in practice I was not able to find anything that can run after my PP2000 that did not ruin Sound. Your mileage might wary but I kind of abandoned any other devised with I discover PP, so I do not know what is nowadays out there.

spytsi wrote:

Although I'm convinced in finding the optimal answers to these questions by personal trying-and-listening, still I'd greatly appreciate your experienced approach to this, like I would for the comments of other forum members.

Be careful with “comments of other forum members” or with my own comments at this matter. When you build your playback you shall not be caring about compliance with some kind of knowledge out there but only with the actual results you get and with compliance to your own reference point. It is not to mention that you live in own country where electricity has absolutely different problems from other countries.  I would not even mention that 220V units might be very different by sound and design then 120V units. So, make your own mind with your own result and pay little attention to what people say out there.

Ok, looking at the flawless performance of my PP2000 I decided to get the PP3000, which was ordered today:

http://www.purepoweraps.com/pdf/USprices.pdf

As I turn my entire playback on (phonostage and Pacific) I suck 96% from PP2000. The PP2000 still operate very fine but if I add anything else with input choke then it begin to bypass when choke has initial inrush current.  With PP3000 it will be I guess around 70%...

I consulted with my tech folks and they told me that by use more powerful output stag and by beefing up coils and caps it is perfectly possible to get more power without affecting anything else. I do a bit nervous as it is not the SAME unit as the tested PP2000 is. It has larger buttery with higher voltage and I am sure many other things that are different. PurePower assure me that the PP3000 in the fields for a while and that they never had any complains of problems. Well, let see how it goes, I am cautiously optimistic….