Romy the Cat wrote:

...I local guy that I know did buy 2 month back a new PP2000 and it was measured horrible  - a pure faulty production and no quality control at all. The PurePower admitted that it was faulty production run and promised to fix it. Now, how many people out there are going in the extend I do and demand proper operation, how many people out there are running faulty PP2000 and do not know about it? My estimate is that the majority of PP2000 out there are just broken and are not to the own specification. They do sound good however. Still my agenda is not promote or demote PP2000 or any other power de but a consumer advocacy and my desire to have for myself a better performing product.  I am with PurePower for 2 years, had 7 of their units and my current is still has a faulty operation. I do understand that PurePower is a work in progress and they do take care about their customers but that way how they do all of it is a bit ridicules for me and insult me with amateurism. They have a great product in my view, they sell it very fast and I hope they do fine financially. I do not know how much time and money they west for support but I know a LOT of people who keep fixing their PurePower units. So, why PurePower would not heir a truly knowledgeable engineer who would chaise all bags that PurePower has and convert it in a stable product, virtually “support free”? I good engineer-contractor would cost them let say $30K-$50K, who care – that is a single rain drop in a whole ocean… The Cat

Rakesh, first of all I have expressed the same sentiments a few times before in this threw. Second, I have to admit that is other company would have the same problem with ratability and support as PurePower does then I would behave differently. However, in case of the whole PurePower saga there are a few moments that I am considering.

1)    PurePower is the only know o me de that sound good. That set all other arguments apart.

2)    PP2000 is working flawlessly in my playback for 1.5 year and now in Bill’s playback. In it faulty as it has the fizzing effect but it sound perfectly fine.

3)    The topology of the PurePower units is that no mater what you do it WILL be dependant from the characteristics of the load. Do not forget that PurePower run global feedback from output and type of the load is the factor for this topology.

As you understand I am not in the business of sealing PP2000. My motivations are way more egotistic and all that I would like to have is better performing power solution in my own home. I do not give as damn about their sales numbers. I would like to have more folks that I know who use PP2000 and who might discover a new perks how to get better sound from it but it is all interest I have.

I do not know is your decision to buy or not to buy is good or bad. I have no idea how 220V PP2000 would sound and if it worthy for you.  I think to make class D amp to swing more voltage is different amp is needed, but I am not sure.  I personally very welcome any criticism toward to PurePower that would enable us the users to end up with better sounding and better functioning generators.

Sure, there's plenty APS or any hi-fi component "manufacturer"/seller won't say, and one of the most common misunderstandings they quietly exploit is the die-hard audiophile notion of the "universal component", the old "plug-and-play" gambit.

If there is a "universal approach" to power supply, one that works equally well for inductive, capacitive and resistive loads of all stripes, then I am unaware of it.  And this is true all the way up to giant laboratory grade power systems, and the power grid, itself, for that matter.  Although some "empirical" research has been done on wave forms, load ratios and frequencies versus load types, I know of no rational, systematic, "subjective" evaluation of any of this power treatment/regeneration stuff as it relates to serious listening to complex music via hi-fi, bullshit "testimonials" notwithstanding.  I assume this is because there has so far been no need to go this far; rhetoric and hype alone have done fine for sales, to date.

Of course, I'm dying to let loose with another flurry against APS' "QA"; but the truth is I'm only venting my personal frustration at feeling so close -  yet so far away -  from a personal solution to this most infernal of hi-fi poltergeists.


Paul S

I've been fighting the electricity for 30 years in the woods of Kensington, NH. but nobody believed me that it copuld be worse than in the city with all of its problems. Even guys I've had up here from New York couldn't believe how bad it is. And its not voltage sag but just horrendous noise on the lines.
Sounds like Romy needs his PurePower unit back again. Guess it'll be my loss until my units arrive. When do you wnat it back Romy?

Bill

PurePower wrote:

Hi Max, If you have buzzing that is audible outside the PurePower case, or audible from a listening position, the behavior is not normal. The probable source is a capacitor. Caps can hum in the same way as transformers - the foil expands and contracts and can vibrate at 60 cycles in an effect that is similar to transformer magnetostriction. You should contact us to arrange for service.