Reading all those posts about the PP2000 does something strange (I god a few private emails for different people as well) I kind of feel a gully pleasure – my PP2000 still works absolutely flawlessly – means did not  blow and sounds good with no noise of any kind. Probably I shall not to run my mouth about it as God will punish me. Anyhow, if you convinced that it is PP2000 problem then pack it up and ship it back.  The consumer macrocosm is not a good thing.

Anyhow, there is another interesting idea that I did not try but sounds interesting:

http://www.ep2000.com/

I have no motivation to try it as my PP2000 address all my needs so far but I would like to hear if someone used the EP2000.

Bud wrote:

Sounds to me like your switch mode transformer is doing the buzzing... There is always a turn on buzz, but just for about 10 seconds. The original one had a noisy fan also, to keep it from self igniting, perhaps that is your actual problem?

drdna wrote:

Well, I think the short answer is yes. What the people over at Technical Support have told me is that this is due to the power supply design of the amplifiers that are being driven by the PP2000 and that it seems to be characteristic of certain types of circuit configurations such as a low powered SET amplifier driving a high efficiency horn loudspeaker. They say this is not the typical stereo set-up and they did not test this when they originally designed the PP2000.

I think that this explanation they gate to you is completely bogus. My PP2000 drives 19 loads with all imaginary PS circuit configurations. I also have high efficiency loudspeakers and I have absolutely no noise of any kind. So, I think that it is not the design problem in PP2000 but some kind of bug that they have in circuit that they overlooked since they produced the production run the happened to be I bought. I am not kidding – I have absolutely no unreasonable mechanical noise from nether the unit nor from loudspeaker. If DC is nulled out then it is absolutely problem free. I know that I sound as I am gloating but it is what it is….

drdna wrote:

Now, they say they have got this kind of circuit set up in their stereo testing lab and have replicated the buzzing results. Each time I call them they say that they are working on finding a solution to this problem and "getting close" -- but it has been almost a year now with no end in sight.

Adrian, it is how they work you need to accept it. I have once in a month conversation with them about my “fuzziness” and they reported that they found the problem and found the cure. It was 6 month ago when they told me about it for a first time, presumably the will send some kind of fix to test in a week, or month, or who knows… Sometimes I call them and they do not even remember what we were taking the last time - it is almost insulting. It is the way how they operate. Still, somehow they slowly do better things and I am sure that soon or later they will send me the fix for my “fuzziness” problem. You just need to keep bother them, relentlessly bother them….

drdna wrote:

Probably too late for me to return it at this point.

With all my negativism about their slow moving progress I have to admit that I never heard from them a comment that my unit is out of warranty or something like this, but I never intended to return it ether. I think that if it is what you worry then you need to make sure the you initial claim about your defect would be with a return period and you then shall be save. If I like the sound of the unit but it has some noise that they feel they will fix then you need to negotiate the return and warranty policy. Again, it never was a problem with me and they acted very polite in this manner.

I have to admit that I do not believe in the “buzzing” problem as you all described. The buzzing you have reasons but no one told those reasons. What buzz, why it buzz.. no one told it concussively yet. What the fundamental and this buzz? At which condition it buzzes? What the measurements are? The expansions of the level of “characteristic of certain types of circuit configurations” I would reject as bogus and not sane. What certain types? Why? Will it buzz if you decouple the regenerator with isolation transformer? How are you planning to debug it is it has no date to interpret what is going on?

Maybe it was easier for an individual to work with APS before they got the great reviews and stepped up production?  Now they have all they can do to fill the orders (and invent new products, of course...).

Romy, I believe you got a solution to your own problems exactly and specifically because you did a lot of their work for them, and they met you part way partly because of this, and also because you make sure your voice is heard, far and wide.

As a company like this evolves, they might actually get better at addressing specific, individual problems; but probably not.

It's rather more likely that they are mostly focused on selling, making, and shipping units while trying to keep a lid on their operating expenses (especially back-end expenses...) and paying down debt.

All the questions you ask are good ones; but they are also the sort of questions that only the most OCD nutcases could be expected to answer.  And furthermore, APs have no right whatsoever to expect this sort of input from their retail customers, based on any of their literature that I have read.

Of all the people who buy one of these units based on your glowing recommendation, I'm guessing one in ten - maximum - has any idea at all where to so much as begin in terms of seriously and rigorously isolating and diagnosing the sorts of very specific problems you have just outlined.  People are never going to read the caveats that pepper this site, but they will ever continue to browse for "suggestions" along the lines of the Stereophile Recommended Components List.

The upside for APS is that most of these shoppers will never even realize that anything is wrong unless the unit hums, or explodes.

And clearly APS have learned how to deal with the hummers.

Best regards,
Paul S

Paul,

You certainly have an attitude toward the subject and I have no idea why. The subject of this thread, or put in this way - the subject of my interest, is how to deal with electricity problem and how to provide a playback with stable (sound-wise) and good sounding electricity. I care less if it is APS, or anybody else and I care less how many units they sole and how many people decided to buy this or another unit. My interests in audio are immensely egocentric and all that I care is how to interests of my own sound and my own interests about it. There is nothing else. I bought my first unit for a full price from their dealer. When they sent me the last PP1050 unit (#6) it did not work and was sitting not working for months and months. Then when the PP2000 become available I did propose that since my PP1050 was virtually new and never operate properly then I would pay the difference and get the PP2000 – they claimed that PP2000 will not blow. During all 1.5 years frustration I had with PP I insisted that they must not return my money and give me something that sounded like the very first unit I had.

I really do not care how much people buy the APS units – I have no financial, intellectual or spiritual benefits from it. I would like more people share the know-how about the ways how to get better sound from this thing but from what I see anybody talks sensibly about the APS sound, not to mention, that knowing myself, I probably will discard the experiences of others. I do encourage the APS to make 3000W model and truly do not give a shit how many of them they sell. I have my own needs, I looking for a mechanism to address them and I truly do not care how my solution will work out with others. I do not see that you see many “recommendations” coming from me, I have many reasons why I do not do and one of them is that it is too damn not interesting for me. I do not remember that “recommended” APS. I do insist that it is the only devise If  does what I want a power devise to do with sound. Is it as recommendation or motivation to buy for others? First of all I do not care and second I have enough information at my site to present a whole picture of many subjects. Do not ask me and do not balm me. Change the interests of sound, if you find that some of my moves are reasonable for you then feel free to experiment for yourself. It is your sound the you are trying to make, not mine. I do not need friends, collaborators or ass kissers on audio. I do not need anyone who read this site to buy the ASP unit. What I would like to have– is somebody point out what the specific in his/her view shortcoming of the APS sound and how they consider overcoming the defined sonic shortcomings. That what I would consider a change – not the dull verbal embellishment of the subject how good or bad the APS Company is. What is it - BBB consumer report of the site that deals with Sound?

I can tell you something more, Paul, I do not extend a lot of credit to the ASP people in terms of Sound. I do not think that what they do is conscious and cognizant. They got some very amorphous grip of good result and they are not sure where they might scare good Sound. The engineering part of gone in China and I do not think that the Chinese folks truly have idea what it all truly for. I think nether APS peoples, nor do Chinese who made APS, nor me have any idea why the APS sound as it is.  I might understand in way the APS – they have something that more or less work and sable and they do not what to fuck it up…

Anyhow, as I said – I am bit surprised that people have APS for months, keep bitching about buzz but made no affords to investigate where is come from. Are you expecting that APS will bring you a solution on a plate? What will you do if your unit will sound like shit after this? Russians says the saving of sinking people is the business of the people who are submerging … at least they need to scream “Help!” and wave those hands….

Beav wrote:

I ran quite a few types of gear with the 2000 I tested.   It was quiet as a mouse with all of them.  So if you're having that kind of high frequency buzzing coming from the unit itself I'd say it needs to be returned and looked at by APS.  I'd lay odds they'll solve the problem or give you a new unit, and that you won't hear that buzzing.   Good luck.

Yes, I should try to stay focused, here.

It is indeed very true and very important to remember that the subject of this thread is not and never will be - I hope - APS, or any other "brand" -  of anything.

I suppose I tend to confuse APS not only with my own frustrations but also with the whore-mongers, just because they misrepresent themselves.

But they are hardly unique in this, after all; and I actually do know to be ready to take my lumps when I try to simply buy any solution.


Germaine to the thread, most of the electricity in the nation has moved or is moving over to the "Smart Grid" system.

Blah, blah, blah, blah...

Around here, this has meant that the electriity has not been as bad  -  nor as good  -  as it used to be...

So, what else is new?

Best regards,
Paul S

Romy the Cat wrote:

I do not remember that “recommended” APS. I do insist that it is the only devise If  does what I want a power devise to do with sound. Is it as recommendation or motivation to buy for others?

Romy the Cat wrote:

Anyhow, as I said – I am bit surprised that people have APS for months, keep bitching about buzz but made no affords to investigate where is come from. Are you expecting that APS will bring you a solution on a plate?

drdna wrote:

I hate to respond to this kind of comment, which is a simple logical failure, but, okay I will, since there is some news. Just to clear this up, simply because you have not had an issue, does not mean that an issue does not exist, and that this must be a defective unit.  This is especially true when the company has already identified the problem, stated that it requires a relatively rare component setup to get the buzzing, but that they have reproduced it in their lab.