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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Max, are you saying that your unit does not hum in use until it is loaded >60%? Does it hum even when running loaded but unplugged (ie, when it is running from battery power only)? Would you please describe the hum?You should be able to find the...
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Paul,I finally received my unit in February 2010. After installing it there was an immediate improvement to the sound of my system. I live in an apartment near downtown Boston. My playback varied from day to day. It proved to be very frustrating ...
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If in the basement next to the failed Chevy Volt battery experiment and my fresh grave you had a massive flywheel spinning at a constant velocity powered by a motor attached to the grid and then used magnets embedded in the flywheel to regenerate the...
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Et Voila! Perfect sound forever.I am ready for a subwoofer sized battery pack by the house electrical service feeding the audio dedicated lines. Whats wrong with this solution? It doesn't exist yet? Heck, $15k in the grand scheme of things...Steve...
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[quote user="Bud"]Yes. Their is a direct correlation between surge current and dielectric materials dielectric constant. The voltages in question are high enough to use a thick dielectric material and just as with the effective resistance of the capa...
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Not sure if SLA batteries can be charged and used at the same time. After all there are just two wires connected to the battery and voltage will either flow to or from the batteries. Not 100% sure about this but I think it's right....
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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 ...
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Hello Romy a long time visitor now a member. I have always been interested in what improvements can be made to my incoming power. I use a BPT 2, PS noise harvesters and quite lines through out the house. My system has always had very good sound...
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I used a cheat plug to lift the ground but that did not help. What helped was either unplugging the unit from the wall or turning off the breaker to run from battery. The noise does not fluctuate with volume or source. Ill take some...
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Another noteworthy effort might be the battery operated, solid state amplifiers with input and output transformers from Serge at www.audio-consulting.ch , available with copper windings. I keep thinking this might be good for Paul in his ...
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Well, there is always a field for concern regarding the size and internal resistance of the battery. Relatively small power bateries do make negative impact. Another field for concern - musical quality of the mains power in Russia an...
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After seeing Paul's recent lament that classical records are getting harder and harder to find, I noted that I listen to only a small portion of my collection. I have my favorites, but I wondered about everyone else.What are your favorite performance...
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Yes, decoud, looking at it like this, it does seem like it would just be a matter of time, money, and some working electrical knowledge before one found an acceptable alternative. One bonus of the DIY route might be that it could incorporate a larger...
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I have pretty well convinced myself that it is important to have a battery as an "active" element between the up and down converters. Of course, the PS units do without this, though I have not tried the newer ones in my own system. Obviously, a big,...
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this weekend I plan on taking the cover off and giving my 2000 a good cleaning. its been almost 4 years and ive been getting some ac sounds at the speaker recently. I need to replace the battery as it has ran its life cycle. hoping this cleaning make...
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Adrian, can you confirm whether you were using cable with shielding or without? Like you I had the buzzing go away when on battery or without PP2000 in system. It became dead silent. Then with PP2000 back in system there was buzzing. I went to all sh...
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About this time last year I decided to stop using my PP2000. It has been sitting in my basement gathering dust all this time. I even put it up for sale last year but only received stupid offers for it, so decided to keep it.I've been having problems ...
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[quote user="manisandher"] So why do I now prefer the sound with the PP2000 as opposed to last year when I stopped using it? I think it's because last year I never plugged all the components into it. Playing around with various configurations the...
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[quote user="manisandher"]Romy, this is very interesting indeed. I'm assuming that the sonic difference between these two files is in line with the sonic difference you hear between bad and good 'electricity' days when you're just listening to music,...
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Hi Emanuele,FWIW, I've been disappointed with my PP2000 (the 230V model). I love the sound then it's running from battery, but think it totally destroys the sound when running under 'regenerator' mode. And as Romy has pointed out, this is totally una...
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Mani, I did find it was strange that you were getting from insulation transformer better result then from PP2000. They are very different devises with very different results. The difference is like to play a CD from an audio output of a consumer $50 ...
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I certainly have my hands full with those dams PP2000. As I least last night UPS lost one of my units I send to PurePower to repair. The shipment was insured but the saddest part is that it was the best sounding PP2000 of mine. So, I will not be get...
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This reminds me. Back in the days, twenty years ago, when we were experimenting with small portable players like the 3400 -- we found they sounded best with a quality battery shunted with capacitors. We used oil types. The results were better than al...
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[quote user="Lx_"] The second sentence is my own conclusion. It was not my intention to imply that it is yours, sorry for the misunderstanding this may have caused. We both agree that PP can be sensitive to incoming AC. The context and circumstan...
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I’d like to post some information about my own experiences with the new PurePower+ 2000 unit, and the customer service (or lack thereof) experienced under the new regime, so that people can be advised. I ordered and paid for my unit in October last ...
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[quote user="Canuck"]Romy Do you plan on trying the new PurePower Plus and if so when? Maybe they should send you a loaner to try for a decade or so. [/quote] Canuck, I do not know. I am for sure would like to try it and I most probably will. I hav...
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[quote user="joaco"]Hello all , i know this topic is almost about pp experience but since im experimenting with electricity i like to share some thoughts here . I builded a dac using very high quality components . As you know the power supply is crit...
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[quote user="Antonio J."]I suspect the APS does more or less the same that my friend proposed. It probably has a class D amp which makes some kind of PWM with a so so smoothing circuit, hence the tooth saw trace of the voltage line, some PS which pro...
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[quote user="cv"]Funny, I was just thinking about battery powering of amps... I know you have identified that the problem is more with the sources, but it would be interesting and quite feasible with the Melquiades and other components... wouldn...
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[quote user="drdna"] It is not exactly correct. There is 60 Hz hum eliminated by lifting the ground to the amplifiers. The neutral is connected to the ground prong and chassis in the amps, so I assume it is setting up a loop. However, there is a seco...
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