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12-24-2008 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,644
Joined on 10-12-2006

Post #: 201
Post ID: 9254
Reply to: 9252
Looking to the Source of the Softness
fiogf49gjkf0d
Sounds too good to be true, Romy.  But it is winter, and I admit I'm still holding my breath.

From the reports so far, it looks like the thing might be worked with to good overall advantage; but, as usual, some significant adaptation is in order.  Small stuff, IMO, to be able to [finally!] build on consistently acceptable AC.

I get the idea of loading the output anodes, and from the way you are talking, another stage or parallel drive may be needed to drop output impedance enough.

At the same time, I am wondering about what sources you have been using.  I mentioned early on that the Jubilee is polite, and I wonder what the Shelter might sound like with the "softer power", just with respect to a capacity for violence, and likewise I wonder if you might try less buffering in the DAC PS.  Sure, it's easy for me to sit here and wonder, but it sounds like you have an opportunity to use more "raw" sounding sources now?

In any case, I am specifically curious about phono, since this is the acid test.

Also, remember that two of the 3 wires in wall the outlet go to ground.  If there is any residual hum it might still perhaps be drained via the dedicated ground, and likewise IC shields, TT's, that sort of thing, where there is low-level spurious or static current.

BTW, I agree with the notion that either most gear and systems are built around bad electricity; or most people are truly as good as deaf.

Best regards,
Paul S
12-24-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 202
Post ID: 9255
Reply to: 9254
It's easy for me to sit here and wonder…
fiogf49gjkf0d

 Paul S wrote:
At the same time, I am wondering about what sources you have been using.  I mentioned early on that the Jubilee is polite, and I wonder what the Shelter might sound like with the "softer power", just with respect to a capacity for violence, and likewise I wonder if you might try less buffering in the DAC PS.  Sure, it's easy for me to sit here and wonder, but it sounds like you have an opportunity to use more "raw" sounding sources now?

I would not call Jubilee as a polite; it is in fact quite punchy cartridge. Anyhow I think word “softer” is not exact depicture of what is going on. I need some time to see how can I reanimate my MF channel then I would be able to see what it was. But the reanimation shell be “smart” and I stil would like to see if I would be able to stay with one stage.

 Paul S wrote:
In any case, I am specifically curious about phono, since this is the acid test.

I played 2 records last week. One for music and one for targeted listening. I have a ‘special’ LP with a cut that I know very well and a CD of very high quality with the same cut. I use this LP and CD to test that my CD and LP sours have a well-defined delta in quality between themselves. I did not detect that with use of PP2000 the delta was lover, in fact I think it got even wider.
 Paul S wrote:
Sounds too good to be true, Romy.  But it is winter, and I admit I'm still holding my breath.

Yes, I did not expect that it would be so easy. In fact I kissed bye-bye to the money I spent for the regenerator and I thought the saga with inept APS engendering will last indefinaly. Well, consciously by APS intend or not but it looks like my new PP2000 does quite well. I do not know if it is just an accidental bug of my unit or a sign of a better model from APS. Frankly speaking I do not particularly care. Do, not forget that 3 month back I got two cartridges from well reputed and very stable in quality Otophone company and the second Jubilee was much better then the first one…

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-24-2008 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005

Post #: 203
Post ID: 9256
Reply to: 9252
More on softness
fiogf49gjkf0d
 Romy the Cat wrote:
In the end I feel that the PP2000’s softness/politeness is not a liability but opportunity. I certainly not willing to go back to the softness/politeness lacking type of sound and I would like to make my playback to be able to be deliberately atrocious if I was asked. Let see how it goes… I still not in hurry to do any changes now as I would like to live with the overwhelming softness/politeness for a while and to get use to it…

Yes, it is a very good idea to wait a while and get used to the sound with the PP2000. From my own experience, every change that has stayed permanently in my system, at first seems soft and sort of boring. I am inside always a little disappointed when I first hear these changes, because they seems so neutral and unexciting. However, in time I come to appreciate that this is a more revealing path to the Sound. Other changes, the ones which are exciting at first more often become fatiguing with time as I tire of the novelty of the new distortions I am hearing.

So live with it for a month first before making any changes.

Again, my thoughts on softness. Softness in sound is correct. Here is my analogy. If someone is outside the closed window talking, you cannot hear them. To hear what they say, they may start to shout, but it puts a harsh strain into their voices -- much like turning up the contrast knob on the TV to see details, gives the picture an unnatural knife-sharp quality. The alternate is to open the window to hear the person talking in a natural voice. This is like the softness effect in audio.

Adrian
12-24-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 204
Post ID: 9260
Reply to: 9256
Every boring change that has stayed permanently in my system....
fiogf49gjkf0d
 drdna wrote:
From my own experience, every change that has stayed permanently in my system, at first seems soft and sort of boring. I am inside always a little disappointed when I first hear these changes, because they seems so neutral and unexciting. However, in time I come to appreciate that this is a more revealing path to the Sound. Other changes, the ones which are exciting at first more often become fatiguing with time as I tire of the novelty of the new distortions I am hearing. 
Exactly!


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-26-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 205
Post ID: 9265
Reply to: 9253
Some thoughts about power as it is…
fiogf49gjkf0d

It is kind of unbelievable in away: I have for a week the same stable sound. That is a good sign. The less good sign that I need to do something else in order to take sound where I would like it to be.

Without doing anything I like what I am getting, I asked many times of my desire to have the final sparkle in the mid of this PP2000 softness is some kind of audiophile itch. I do not think so and I feel that the performance of my MF channel in context of the “different” electricity shell be revised. The good part is that I might combine the MF revision with my DHT experiments – good timing.

My only concern at this point with going further is the presents on the out of my APS regenerator the “Nervousness Distortions” upon which I commented on previous page. I do not know HOW they are auditable. It is very possible that they are not auditable at all or, that they even improve the sound. I still would like to get a reference result with a clean sinusoid and then to go from there. Also, I do not know if the APS fixes the problems then what sonic consequences the fix will/might have.

For a time being I did drove my MF with different amps in context of the new softness. I have a full-range Milq (from my Insertion channel) that I used with speaker-level filter. I have also tried different S2 drivers, with metal suspended diaphragms. I built the 2A3 kit (took 3 hours) and was trying to drive MF from it. The results were different and mostly in a right direction but to lock anything in my mind I would like to know that the electricity environment is dead-bolted. So, I need the APS people to finalize their results in regard to the “Nervousness Distortions”. Or perhaps I need to wait when the Avicenna arrives and see what it will do.

I think my movements with MF amps will last another month or so, I am not really in hurry. Whatever it is, is kind of very interesting - it is good but with “no transient reserve”, if you know what I mean. I king of accustom that my MF channel has a lot of spare transient capacity that it is not necessary use but has in disposal if necessary - it does not work now this way. Also, the “Water Drop” tweeter acts also “different”, it is not worth but butter and “different” – I can’t figure out how at this point. I certainly need to live with it longer. The next week I will be taking with APS folks about the “Nervousness Distortions”, let see how it will go….

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-26-2008 Post does not mapped to Knowledge Tree
DSH


Moscow, Russia
Posts 11
Joined on 06-18-2008

Post #: 206
Post ID: 9266
Reply to: 9265
A question on ferrites
fiogf49gjkf0d
Hi Romy,
You have mentioned that you used ferrites with PP 1050 with positive results from the "softness" point of view. What about dynamics? Did you get any improvement while using ferrites. Whether ferrites helped to reduce regenerator's own sound additions in the mids? Another thing is how did you implemented those ferrites into 1050? I haven't found photos of that.
Thank you,
Denis


Nothing ever goes as planned
12-26-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 207
Post ID: 9267
Reply to: 9266
Nothing ever goes as planned
fiogf49gjkf0d

Denis,

In the PP 1050 I had better result what I use extra ferrites in deferential modes, or putting ferrites in each individual wire. I never had problem with PP 1050’s dynamics until I begin to add capacitance to the PP’s output over 3-4uF. I also had no PP sound additions in the mids. With all my blame to PP 1050; sound I do not think that I had any issues with it. The Super Texture of the 1050 broke the mids apart a bit but it was about it. What problem are you experiencing? Can you post the wave your PP outputs?

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-26-2008 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005

Post #: 208
Post ID: 9269
Reply to: 9265
Midrange problem?
fiogf49gjkf0d
 Romy the Cat wrote:
I asked many times of my desire to have the final sparkle in the mid of this PP2000 softness is some kind of audiophile itch. I do not think so and I feel that the performance of my MF channel in context of the “different” electricity shell be revised. For a time being I did drove my MF with different amps in context of the new softness. I have a full-range Milq (from my Insertion channel) that I used with speaker-level filter. I have also tried different S2 drivers, with metal suspended diaphragms. I built the 2A3 kit (took 3 hours) and was trying to drive MF from it.
With presumptively corrected electricity issues, it seems there is a focus on a certain midrange deficiency. Okay, this is very much to be expected, since the system had been created to compensate for the effects of bad electricity.

So what are the effects of good electricity of the PP2000? It may be a good idea to look at the frequency response and harmonic distortion of the system to see if filters in the Macondo speaker system may need to be adjusted now for example. At any rate I would first examine the results of the PP2000 more closely before making any more asymmetric changes to the speakers or DSET amplifiers.

Adrian
12-26-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 209
Post ID: 9270
Reply to: 9269
The rational to examine the results…
fiogf49gjkf0d

 drdna wrote:
So what are the effects of good electricity of the PP2000? It may be a good idea to look at the frequency response and harmonic distortion of the system to see if filters in the Macondo speaker system may need to be adjusted now for example. At any rate I would first examine the results of the PP2000 more closely before making any more asymmetric changes to the speakers or DSET amplifiers.

There are no low-path filters in Milq-Macondo’s upper frequency drivers. The MF driver runs high-passed, wide open atop. I even thought to put temporarily an extra resonator at + 2daB 10K to see help, the old metal-suspension of S2 drivers dose the same. What I feel is that I would be OK of I get 1.5 more transformer ratio and 1dB more gain with the new ratio. This would male me to have 3-4dB more from the MF tube, but I have no more gain in there. This leads to two-stage solution (if I am willing to stay with triodes). However, if I end up with two-stages in MF then why do not trey the DTH in the second stage?

I would agree that there is a rational to examine the results of the PP2000 more closely before making any more asymmetric changes to the speakers or DSET amplifiers but I do not make any changes to the speakers or DSET amplifiers. The speakers are the same and the only changes I make is to the separate SET amps where I might model the changes. I am not going to open the Milq and to make any change until I have a confidence that the things are all settled from all perspectives. At this point I will have two amps for my MF channel – the default Milq and the experimental with San-Audio DHT.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-27-2008 Post does not mapped to Knowledge Tree
DSH


Moscow, Russia
Posts 11
Joined on 06-18-2008

Post #: 210
Post ID: 9281
Reply to: 9267
1050 sound additions
fiogf49gjkf0d
 Romy the Cat wrote:

Denis,

In the PP 1050 I had better result what I use extra ferrites in deferential modes, or putting ferrites in each individual wire. I never had problem with PP 1050’s dynamics until I begin to add capacitance to the PP’s output over 3-4uF. I also had no PP sound additions in the mids. With all my blame to PP 1050; sound I do not think that I had any issues with it. The Super Texture of the 1050 broke the mids apart a bit but it was about it. What problem are you experiencing? Can you post the wave your PP outputs?

The Cat


When CD player is powered through PP1050 I notice the sound becomes concentrated on mids, they look like being brought forward. Additionally the uper mids sound unnatural and sometimes even harsh. I presume that the impulse power of the Chord One reacts like this.
Dynamics (both micro and macro) are suffered when the amp is in the 1050 - here you are right. This is due to 35% loading of the PP.
Sorry, can't get the wave - don't have monitoring device.
Denis


Nothing ever goes as planned
12-27-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 211
Post ID: 9283
Reply to: 9281
The factors with PurePower.
fiogf49gjkf0d

Denis,

There are objective characters of electric wave and deviation from it sinusoid profile impact sound. Leaving the HF noise aside I would say that there are also some unknown characters of electricity that impact sound. What you report shell not take peace and it is doe then in order to think about any exoreic reason the normal objective reasons shell be filtered out. The PurePower devise runs a global feedback in order to make the D-amp operate. This makes the characters of load being a direct derivative of the regenerator operation. The type of the PS of your load might or might not to distort the operation of PurePower. If you are willing to debug your problem then you can’t make it blindly – you need to have an objective data about the operation of your unit. Found a friend what has a scope and know how to operate it and it will be a good help to you. What you report is not something that I experienced. The PP1050 did not channel my “concentration on mids” and did not change frequency response at all. Also, I did not see that it “dynamics (both micro and macro) were suffered” when the PP1050 drove amps with CRC power suppliers. Did you try to play with AC polarity? If you did not then you shell as it is huge factor with PurePower.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-27-2008 Post does not mapped to Knowledge Tree
DSH


Moscow, Russia
Posts 11
Joined on 06-18-2008

Post #: 212
Post ID: 9284
Reply to: 9283
AC Polarity
fiogf49gjkf0d
Thanks Romy. On the AC polarity do you mean playing with the player/amp polarity or with the PP one? I always try to have all devices to be in phase.
Denis


Nothing ever goes as planned
12-27-2008 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 526
Joined on 10-29-2005

Post #: 213
Post ID: 9288
Reply to: 9283
Electricity and equalization
fiogf49gjkf0d
 Romy the Cat wrote:
With the late success in my battle with electricity I was slowly reviewing some of my things. What I detected that in context of good electricity I can set up my Injection Channel much more aggressive, let seat 2-3dB more than I did before (not it is at minus 12dB).
This is of course a form of modifying the speakers while you are still in the process of getting used to the sound of the PP2000; it may be premature.

Irregularity in the AC waveform can be thought of to give the effect of frequency modulation to the signal. The distribution of this variable modulation can impact the audible band. Further, the recording engineers also had to live with this. Not only is it embedded as part of the recording process, but they may likely have compensated for this artifact in equalization.

This complex effect means that most likely using a pure AC source like the PP2000 will demand changes in equalization that do NOT result in a flat frequency response curve. It would be necessary to equalize the system like RIAA, of course not to this extent or in this way, but the idea is the same. As we must decode records made with RIAA response curve to get correct sound from the speakers, we must think about equalizing the system to compensate for the recordings made with bad electricity.

The nature of the curve is unknown as of yet. However, based on Romy's observations so far, the high and mid frequencies may need to be boosted in relation to the low frequencies.

Adrian
12-28-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 214
Post ID: 9290
Reply to: 9288
The PP2000's curve equalization? I do not know yet.
fiogf49gjkf0d

Actually, Adrian, I think you took it out of context. I the quote above I was talking about the Injection Channel and I did not talk about the whole system equalization. I just said that the Injection Channel might be driver harder. Do not forget that in the Injection Channel I had a Red’s compression tweeter that has less dirt with better electricity. However the “colorful dirt” is something that I USE from Injection Channel, so it is not surprise that now I might add a few dB more from the Injection.

Regarding the “curve equalization”… hm, I do not know yet. First of all I feel that PP2000 is slightly “released” some HF. Second, I have already EQ the system by adding 6dB on tweeter and running MF from 25-30mA on plate to 38-40mA on plate. It is a strange feeling as it is not as much about a shortage of HF but rather a shortage of excessive HF to which we most unfortunately are accustomed in audio. I was listing today the RR orchestral CD with their full extended range and I felt absolutely no shortage of anything. Anyhow, it might a very mild bust of MF would be interesting but I would do it only very atop of MF diver. Still, I did not make any conclusions about it.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-28-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 215
Post ID: 9295
Reply to: 9290
As you understand I do care about it: PP2000 and HF
fiogf49gjkf0d
 Romy the Cat wrote:
First of all I feel that PP2000 is slightly “released” some HF.
The reported “softness” of PP2000 came with some HF roll off. I drive my MF amps much harder while I use PP2000 and it was a good help but still there is some minute deficiency of HF. Since the PP2000 keep running in my system, today is the 10th day I believe I strongly feel that it does opening up HF. My initial reaction was that my hearing and my perception might be just are getting more use to and more comfortable with this HF-subdued type of sound but as time goes by I feel that it is not the case. I do strongly feel that as PP2000 burns-in the HF are returning back. I do not know where it will settle but so far I found it as a good tendency.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-28-2008 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,644
Joined on 10-12-2006

Post #: 216
Post ID: 9297
Reply to: 9295
Screw "HF"
fiogf49gjkf0d
Wouldn't it be nice if the PP2000 finally allowed a "qualified" system to produce realistic HF, where the treble sounds clearly originate down where they are supposed to and the highest frequencies are "inaudible", like they're supposed to be?  I have an idea what this might sound like and, frankly, it couldn't happen too soon for me.  Along with LF, I have found the too-busy/much HF situation to be one of the biggest and most stubborn spoilers of hi-fi.  Still, achieving this calmed/balanced HF might well wind up prompting another round of tweaking and maybe some outright changes if it were ever to happen to me, since - no doubt - some aspects of my present system are set as they are just with respect to BE's up-to-now near-constant effects on HF.

Best regards,
Paul S
12-28-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 217
Post ID: 9298
Reply to: 9251
More about the PP2000 and bass
fiogf49gjkf0d
 Romy the Cat wrote:
Simply beyond any criticism. The Purepower bass was something that sold me on the very first unit in June 2007. The very first Purepower 1050 had the same type of bass. What kind bass? Well, if juts did not “improve” it and did not modified it in respect to what it is once-twice per year when electricity is good. It is just what it is without any “help”. I have to note that I never see any power devise that does not ruin bass. Furthermore the PP2000 did something that made me to say “holly shit” and made me willing to kiss the damn regenerator. Two years back when I finalized the 6-ch Macondo and Melquiades interaction I use one of my “secret” method of slowing down midbass. I discovered some effects during my experiment with delay channels and I implemented some foundlings, I do not want to go into details about it now. Anyhow, the things were done “properly” according to the “concept”, the results were fine (my rook sound “larger” then what it shell be) but honestly I expected more from the “concept”. I still felt that my midbass it too fast but some other aspects did not allow to slow it down, it is complicated. So, driving the system from PP2000 I suddenly recognized that my midbass has slow down, exactly at the level how it meant to be in accordance with the things that were done to Macondo/Melquiades. It was like a freaking déjà vu feeling! So, presumably the AC nose or what it is made my midbass to collapse sharper…
Yep, something PP2000 dose very right with bass. Tonight I bought the brand new first pressing of Karajan’s “Die Walkure “ with Berlin and Regine Crespin, Barbro Ericson and Gundula Janowitz. I am not sure that I like everything in it but all together it is a fan ride, I am 3 sides through as now. What impressed me from audio perspective that PP2000 hold ground of bass imaging of different volumes. During the prelude of the first act when the basses go very quiet just before Sigmund is introduced it is very common that as softer bases go the further the depicted by playback. The only one piece of audio that absolutely immune to this problem was Sansui TU-1X getting live signal. I was getting Die Walkure last year LIVE from MET (and MET signal is not straight analog but re-processed garbage) and it was fine. Any other recordings I have volume of those prelude’s basses means distance. Now started to play the Die Walkure I was making my typical faces as the Karajan’s prelude in this recording is very ugly BUT then suddenly it hit me that despite of questionable orchestral musicality the basses when they went very soft were sitting still right there at the very same distance (and it was in a very live and ambient performing space). I think it is the PP2000 goes its job. Very impressive!

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-29-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 218
Post ID: 9299
Reply to: 9250
The drama with PurePower 2000
fiogf49gjkf0d

I figured out that my site turned out to be a quite good source for “PurePower’s Survival Guide”. It would be nice to abstract the PurePower into a separate subject but it is too much intervened with the thread of “Bad Electricity” that I decided to keep it as is. Anyone, I hope the people who cluelessy use PurePower and who strive for better results will find this post.

Last night I listening the 6 sides of my “Die Walkure“ I caught myself that all HF went back and the sound was not HF challenged, furthermore I even rolled off 2 db on my tweeters. The record I played were un-played, tulips, first pressings but the recording was not to my liking. The orchestra did not do what I would like it and the sound was what other my call the typical DG sounds. I cared less as I was listing for different thing…

Somewhere in the mid of the second act, I comfortably posturing on my couch, clicked a few DB mode right along with Wagner turned loud and it suddenly came to me that something was wrong. The brass section of Berlin Philharmonic during upsurge becomes almost painful. That was the effect that I thought the PP2000 cured and soothe that I did not experienced for 10 days. That puzzled me. I looked careful at the sound that I was getting and I did recognized a lot of sighs of bad electricity at HF. This type of sound I was attributed to the given records and had no thought about electricity as my entire systems was running from PP2000. I put the “Die Walkure“ aside and played the recordings that I knew. It was obvious that SOME aspects of bad electricity came back: excessive HF, improper integration between woodwind and strings, “noisy” sound of woodwinds, flatten imaging of upper frequency region, absents of sophistication in horizontal propagation of portrayed sonic events, few more and too long to mention them all. What pissed me is that the whole system was running from PP2000 and I changed nothing.

Since I introduced the PP2000 I literary took my playback apart as all power cord and power suppliers needed to be rerouted. Yesterday morning I cleaned up my room and put all right power cords in this final location, finishing the experiments with power lines, PP2000 and taking the PP2000 box to the storage. I however did not change anything in the connection and my playback still was ALL running from PP2000, all 19 receptacles. I figured that ether the PP2000 got broken, of the power line begin to have something that PP2000 was not able to decouple handle. It made me very disappointed as one of the greatest accomplishments of the PP2000 was (I thought) that I would never will think about instability of electric quality anymore. Well, the result I was getting made me very sad.

I was trying mentally to return to the glory time of the PP2000 (a few days back) and I asked myself what I did wrong. I know that the morons who sell $5000 power cords in context of bad electricity would say that I used wrong power cords to lay doe the final setup but it was not the case. First I know my power cords and second the type of the problem that I faced was very much beyond what power cords might be even theoretically to be responsible for. I decided to debug even it was very late but I might not have time this week and I really did not want to end the year with the knowledge that  my problem with electricity is still pending.

Well, it was painful, ugly and I have found the problem near 4AM… I for a long time did not go to bad so “satisfied”. It turned out that that problem was not with PP2000 but was a very minute and completely neglected by me change I made that I even forget to acknowledge. It however had a profound effect and screw up all sound.

So, what I did. I have Dorrough –made, high precision 1/4dB modulation meters on right and left channels. They are digital and I run them for years to calibrate the output of each channels, the people who run multiamping with tubes would understand now indispensable this tool is… and I run 12 channel of active amplification. They are 2Meg input impedance and have absolutely no impact to sound, I usually keep them unplugged of plagued in uppers bass channel. I did not use them for the last two weeks but since I put all system back I plugged them. My PP2000 sits in the closet on the left and the Dorrough meter for my right amps had no length of the cord to go the and I figured that it would not be too much hard to plug it in power lines. After all it has no ground connection, uses only hot and neutral, has huge input impedance for signal and affects nothing. Well, good luck with this thinking as unplugging the Dorrough meter from the power lines and plugging it to the PP2000 regenerator eliminated all problems that I describe above.

So, what is the concussion? In the following article:

http://www.romythecat.com/GetPost.aspx?PostID=9250

I accented how critical to maintain in the components connected to PP2000 an absence of any other grounds. However, the story with Dorrough meter sudsiest that it is not only the alien grounds but the alien neutrals those screw up sound of equipment driven from PP2000.  So, if the power line has .630V between ground and neutral, the PP2000 sits on the same ground but the PP2000 outputs 1.120V between ground and neutral then those neutrals are absolutely not compatible, otherwise you might be paying the sonic toll as I did. Connecting Dorrough meter into neutral with different reference to ground had horrible impact to sound, much worth then I even might expects. Whatever the reason is but it shell be considered, knows and used as the playback connected to PP2000 looks like hipper sensitive to those sort of things.

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-29-2008 Post does not mapped to Knowledge Tree
DSH


Moscow, Russia
Posts 11
Joined on 06-18-2008

Post #: 219
Post ID: 9302
Reply to: 9284
It's not in the AC polarity
fiogf49gjkf0d
 DSH wrote:
Thanks Romy. On the AC polarity do you mean playing with the player/amp polarity or with the PP one? I always try to have all devices to be in phase.
Denis

I tried all the options on the polarity last day and it appeared this does not help.
Regards,
denis


Nothing ever goes as planned
12-30-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,131
Joined on 05-27-2004

Post #: 220
Post ID: 9307
Reply to: 9290
I am calm and happy
fiogf49gjkf0d
Yes, the HF do slowly return with PurePower 2000 where they shell be. It very slowly the PP2000 look like dials itself back to “neutrality”. I begin very leisurely to roll back my tweeter and the plate current on my MF channels.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
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