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.

Last night I have an interesting “event”. I accidently unplugged the PP from power line and did not know about it. In a couple hours I realized that the lights on my equipment that all time on are off. So, the PP buttery was drained out. Interesting, apparently the PP does not alarm that the buttery is about to be run out. This is a standard practice with all UPS devises, I am sure it has built in PP but presume the ASP disconnected the buzzer. Also, I wonder if the PP runs out of power gently and drop the load until it goes to let say 5% of full charge or it continue to discharge the buttery to absolute zero volts (wish is not good with Pb buttery). It is not that I am very concern but I would love to have that “5% of full charge” buzzer to blast off.

Also, that was very interesting: when I put the power cable back to power line then the first minutes the PP was hissing and screaming like crazy. I was presuming that it was completely drained buttery being violently charged, that is kind of odd as it shell have a current stabilizer. I do not know when it stopped – I went to sleep, but this morning the PP was back to it silent operation. It was a first time I ran PP into a deep discharge.

Maxzimum,

I have written many times about it. Read the thread. I do not use the PP load meter and have my own. If you are talking about noise then you need to be much more specific than that. Anyhow my unit has no noise that I would worry.

Romy the Cat wrote:

Last night I have an interesting “event”. I accidently unplugged the PP from power line and did not know about it. Also, that was very interesting: when I put the power cable back to power line then the first minutes the PP was hissing and scheming like crazy.

Hello !
I have a question for the APS users regarding the unit's operation...
Is the battery system an ACTIVE component of the double conversion process (AC - DC - AC) or is there just for back-up purposes in the case of a blackout event ?
In other words...does the unit start and operate normally WITHOUT the batteries considering the unit is plugged into the wall socket ?
Thank you !

Guys,

you do not need to ask this question to anybody else but the APS themselves. Would it make sense to ask a manufactures about the principles of their products operation?

I would certainly not talk to the APS re-salers as they even further submerged in a depth of clueless. Saying it, I have to admit with all honesty that I am not sure that APS people themselves know, as least those I dealt with. I did ask this question a few days back and the answer was not definitive. I did also asked about the problem with noise that you guys had (I was worrying that I might get your noise if I change something). The explanation that they gave to me was ground loop related and it was absolutely ridicules. When we were trying to debug the noise that Adrian had we went over lifting ground on Adrian’s power amps and the rest components he plugged into the PP2000. Adrian reported that it did change the noises. If so, then what the ground loop the ASP is talking about?

I do not know. It is all does not make send to me and I do understand that it might be frustrated. I have absolutely no problem problems with APS sound but in my desire just to understand some things the confusing information makes me annoyed. I could imagine how it would be if I actually have a problem…

Petrasescu_Lucian, the question how the use butters is very good one. In the way how it shall be the oscillator and the amplifier shall be driven from the buttery. While the buttery power the things it being charged. This is why the design use led buttery as it might be infinitely overcharged. In this configuration the buttery acts as a phenomenal a few farads capacitor that deepens the APS decoupling from the grid. However, APS could make the buttery not to be in pass when the unit runs from mains. Only God know how it is gone in the current revision of APS. I know it is somehow different as the PP2000 can work without buttery but the PP1050 does not. I am not sure that APS understand the difference as I took for me time to explain it to them… after which I still had not definitive answer.  Perhaps I was taking to wrong people, I do not know… If I need the answers more than I do then I would figure it out myself tracing the APS passes but frankly I do not what even to open my unit as it work great and knowing my history with former 5 ASP units I do not want to spoil my luck.

This weekend I was told that there is a new power conditioner out there: Dmitri from Running Springs Audio. I never heard the company and have no idea that they are, what they do and what the stand for.

A quick search lead me to number of positive comments about Dmitri on line and the Robert Harley’s review the “The Absolute Sound” this year.

http://www.avguide.com/review/tested-running-springs-audio-dmitri-ac-power-conditioner

http://forum.audiogon.com/cgi-bin/fr.pl?raccs&1245823401&read

It does not look that any of the people who say anything about Dmitri mention the theory of the operation. The Running Springs Audio’s site also does not give a clear idea what they do:

http://www.runningspringsaudio.com/technology.htm

http://www.runningspringsaudio.com/philosophy.htm

http://www.runningspringsaudio.com/techinfo.htm

It is not mandatory and I might accept the concept of “black box” – after all it is only Sound the matters. The experience with my Avicenna Regenerator that out a prefer power from all perspective but has no impact to sound did threw me off…

I read the Robert Harley review and after I did it as realized how desperately I miss my “beloved” Srajan Ebaen. Srajan makes good pictures, tell stories how wonderful the company’s secretary dog is, then discuss briefly the problem of poodle breeding in Nicaragua and the “review” is done. With all Moronity of this approach Srajan made a very smart move do not even write about sound or about the things that are matter. This is VERY smart as he is killing two birds with one stone:  he does not expose to readers that he is a fucking Moron who has not idea about Sound but the  manufactures feel that they were reviewed, hence leaving for Srajan the opportunity to extort his typical fees-benefits. With all idiocy of this Srajan’s reviewing I kind of turn to like and I take Srajan’s articles as not more than new snippets.

Robert Harley wants to write an “analyses review”, putting himself in some kind authoritarian position to judge the Dmitri’s sonic benefit. The fact that Mr. Harley year after year just xeroxing the same audiophile brain structured, high-impact intended colloquialism is irrelevant. The absolute same semantics he used about a few power devises he “revered” in past: Equitech, Monster, Shunyata, Adept and a few others. Those devised sounded like shit but the goal was accomplished and many brown tracks went to delivery – the well-oiled mechanism of audio reviewing-distribution acted flawlessly. Still, if the cheerleader Robert Harley raises her cheerleader skirt too high and you are unwillingly see under the skirt the dirty underwear and ugly harry legs then it is not necessary mean that the game will be bad… so, who knows…

The comments of the people who said about the Dmitri’s power conditioner are interesting, primary about bass. What is necessary is to learn what they mean by bass. Robert uses Wilson Alexandria and Spectral DMA-360 amps. Wilson is 4th order band-pass, has very good mid bass but very questionable lower bass.  Spectral 360 has very low but very mechanical bass. So, it might be interning what is Robert’s definition of good bass and how Dmitri’s might interact with this Robert’s bass. The Audiogon guy runs Magnepan with Martin Logan Subwoofers powered by Pass and he listening jazz. Yep, the view of this guy about bass is something that I value as much as I value the views of Mahmoud Ahmadinejad about history…

With all that said it looks everyone notices that Dmitri’s power conditioner improves dymick, at least it is what people say. That is very good sign if it so. My concern is not about the improving dymick but about preservation of a proper length of harmonic decay. Many power devises create a feeling of dymick increase but they do it by transacting the harmonic tails – that is not good. Mr. Harley’s comments: “Dmitri made the system sound lighter” make me wonder: doe this lightness comes from striping harmonics of from something else. Robert said nothing about harmonic (not power harmonic but sound harmonic) but this is in fact the key in reference to which all improvements must be projected. One of the greatest accomplishments of PP200 (and it is the only power devises among those that I witness doing it so far) is that doing all its improvements it looks like it does not screw up harmonic pattern of Sound. I am not saying that Dmitri’s power conditioner might behave differently – I just do not know. It is might wish that you – the industry reviewing Morons who read this posts – include the observation about harmonics in your furfures reviews of the Running Springs Audio Dmitri. Also, I would like people with SET amplification use Dmitri and I would like to hear their comments about a relationship between loading and use of Dmitri power conditioner.

Romy the Cat wrote:

... and ugly harry legs...

What picked my curiosity and what I found very interesting is to learn if the Running Springs Audio (RSA) flaks own any truly dymick/harmonics not screwing filtration know-how. If it so then it would be VERY interesting to merge with APS does with what RSA does.

I have no idea what RSA does but since it is plosive devised that has only caps and coils and since then claim “regulation” then it might do some minor ferroresonant filtration. I say minor as no one comment about any noise from this thing and to have a deep ferroresonant wave reconstruction they would need to over-saturate core that would have some mechanical noise. So, let pooh-pooh their comments about regulation and accept that RSA is juts passive filter with very minor regulation and buffering function, probably for a one-two periods). Obviously the RSA can’t get more voltage if it sinks and has no option against complete voltage droop (despite what they say at this website).  Pay attention – no one past any waves before and after and no one give any harmonic distortions numbers.

So, I wonder: what if to apply the RSA presumably dymick -neutral filters to the PP2000's output filters? We know that APS reconstructs the sinusoid summit and what is more important the current sinusoid. We know that it does not screw up dynamic and that is sound good. We know that it has out LC filters that semi-killing the caring frequency of D-amp amp and the nose of the own PP2000 circuit. So, why do not let the RSA filtration to handle filtration, presuming that RSA will this time care the fully proper sinusoid.  All that we need to know is how the APS takes the feedback - before the output filters of after them. If the APS’ filters are not in the closed loop then it would be easy to short the APS’s output filters and drive signal to RSA, letting see how the $5000 capacitors on sorbothane feet will handle the gob. Sure it all might be interesting if there is any true value beside all those RSA claims. Also, it is truly necessary to know what the RSA does in order to assess what kind load RSA might be and how much it would decuple the final load from APS 2000’s output.

I would LOVE to have the PP2000 do not see the specifics of it's loads but so far whatever I put between PP2000 and load did screw up sound.

PurePower wrote:

Without its own source of power it would be impossible to truly isolate the PurePower output from the incoming utility power. That is why there is no difference in sound when the PurePwoer is on battery or it is on utility supply. The output of the PurePower is not dependent on the incoming AC in any way - so the output is as if it was always running on battery.

PurePower wrote:

I'm sorry if my post seemed to be directed at your acoustic noise issue. It was meant to reply to 2 other postings that simply asked if the battery only turned on in a blackout and whether there was a difference in the audio system performance between utility and battery.

PurePower wrote:

If you have a unit that makes objectionable noise that interferes with listening while charging the battery you have a unit with an unusually noisy transformer in the charging circuit. There is no need for theoretical analysis - it is probably just a noisy part. Call us and we will be happy to discuss a solution.

drdna wrote:

However, my comment was just intended to correct the error when the APS representative said there was no difference in audio system performance between battery and wall power. THERE ABSOLUTELY IS, but it will not be a major difference for most listeners.

Adrian, yes and no. Let me to explain.

I can testify that at the very first unit I got 3 years back there was absolutely no difference between running from buttery and running from power lines.  At that time it was very important to me and I spent a LOT of time for very careful and very thorough assessments of this concussion. Please, take me seriously- there were no differences, at least worth notice difference.

Then I understand the APS keep changing the charging, discharging ways and the ways how the battery is being used. The PP2000 works different then PP1050… I have no idea what they do, I do not think that they have idea what they do, at least I was not able to get answers for very rudimental questions. Measurably the PP2000 and PP1050 running from power lines vs. from butteries act VERY different. So, they do sonically.

The problem that I see is that there is no default performance level of PP2000 upon which we can make concussions. I have a guy who contacted me a few months back who state that his PP2000 sound phenomenally from butteries and like shit from power lines. My own PP2000 does have a very-very-very minor difference between lines and butteries operation and… I like the sound from lines better.

However the key in all of it is the fact the id On-line regenerators is properly implemented, means all is driver from butteries only and while butteries are properly charged by DC then it must not be any difference between running the unit from the lines or from butteries. So, my statement is that there is no difference between lines and butteries and if the difference does exist then it is ONLY because very specific defects/bugs of your given unit/model/production run. I wish the APS to stabilize this thing….

Romy the Cat wrote:

My own PP2000 does have a very-very-very minor difference between lines and butteries operation and… I like the sound from lines better.

Romy the Cat wrote:

So, my statement is that there is no difference between lines and butteries and if the difference does exist then it is ONLY because very specific defects/bugs of your given unit/model/production run.

Adrian