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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="manisandher"] The only advantage I can see really is in the dedicated power supply... possibly. [/quote]
The subject of power supply in computers that run sound is complicated subject and frankly I never heard anyone talk about it...
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The original Odyssey PC625 battery I used for my DAC finally crapped out, a couple of months ago. This means it worked when I wanted it to for 12 1/2 years. Not bad, I think, and this even though it mostly just sat there, doing nothing, since I usual...
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Of course we need a definition of "better" before we can say it's better, and I suppose you have that, but it seems to me it is rather a matter of "good enough", whatever that turns out to be. The urge to make a sonic change for its own sake is somet...
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[quote user="Romy the Cat"]
I do not know, I always have difficulties to talk with audio people about those subjects. They seems to have very strong and very definitive position how different driving tool affect sound of their timbales. The most ...
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The PurePower batteries provide power to the AC regeneration whenever it is required. That could be during a black out, it could be during a brownout, it could be for a fraction of a cycle it could be for 10 minutes. The simple fact is the incoming U...
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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 t...
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On initial installation of my borrowed 1050 i used power cords i have as extras. Did so cause i was still using my BPT for everything but my amps. I had a hum and high pitch buzz from my speakers. Replacing the power cord feeding my amps was the cure...
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It is not a fear of forced ventilation per se, rather a fear of dust permeating the enclosure. You may have noticed that the power supply chassis' have been designed without ventilation holes on the 'roof'...this is to eliminate dust-fall into the i...
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[quote user="N-set"]Anthony, I'm sure you realize that air springs and bearings can only isolate from the structure born vibrations. Placing the tubes so close to the speakers you give them a great chance to catch strong airborne vibrations. Or will ...
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[quote user="Romy the Cat"]Those 3 new units had huge between butteries and AC.[/quote]I don't really want to share my thoughts on the sound of the PP2000 until my dedicated circiut is in place. But I will say that fed from my current utility line, t...
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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 capacitor, there is a ...
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Romy Hi, Raplh uses a 300b push pull, but the power supplies are massive, parts alone 15K Euros, each channel has a separate supply, the pre-amp again two massive power supplies , he prefers to use eight of the horn loaded bass bins, although I...
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[quote user="rowuk"]I am always a bit hesitant to buy into "listening descriptions". I am a musician and am confronted every day with Sound bias - attraction to what we are accustomed to, expectations being confirmed. We are creatures of habit and mo...
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Man would I love to visit the MIT fleamarket... only a few thou miles away alas.Well, I'm not advocating A2 in any way. The 13E1 will happily run at lower anode voltages but you won't get enough A1 power out, which is a shame cos you'll need a new po...
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It is not about low voltage buttery power, tube version with 200 pounds power supply, CRL filtration, no-transformer gain or air capacitors. The topology that we might or might not admit to comply with the concept of “acceptable phonostage” is co...
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Romy, you mentioned the output separately and John Wright also puts great emphasis on what he calls the "analog" part of the DAC. I haven't even taken the cover off the thing yet, but the way the power supply is implemented is so simple, i...
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It is even hard to critique because it is beyond of being ignorant of stupid. The John E. Johnson’s review of Lamm L2 preamp in the “Secrets of Home Theater and High Fidelity”. Below are the fragments of the John E. Johnson’s pearls… Each quoted stat...
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Yes, Romy, the pictures of the PP's switch-generated output traces are very different from the direct, clean AC outlet output traces, all right. But this is not the same as a switch mode power supply, since what PP promoters here are talking about i...
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Dear Romy,Assuming that your questions are "honest" ones ( I have no reason to believe they are traps, like it happened to me before with a certain Mr. Thor), I will give you "honest" answers, hoping that our dialogue will be of some interest to the ...
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Melquiades condition (both cathodes heated)Plate Voltage 220vBias Voltage -80v (-110v puts the working point in a ridiculous place on the curves I have)Plate current (according to the curves) 165mA approxPower Output 15.5 Watts2nd Harmonic ...
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I made some power measurement of the Super Milq, to my surprise it is not so much hungry east as I expected. During the startup, what the B+ begins to charge the large capacitors the amp sucks 8,6A. When the amps is fully charge, heated and in it cru...
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I mean we can take real live analog music, convert it 100% to digital and get incredible playback if we pay attention to details but we can't take an ANALog 60/50Hz AC signal and clean it up enough for MEGA expensive equipment.Electricity IS a proble...
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All that has been discussed at length many times this board. It seems that people continue to confuse neutral and ground, and I agree that it is confusing. Basically, any commercial "power company" power grid supply in the US will be grounded at a se...
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That's a whole lotta Bidat you've got there, Romy. By contrast, I'm guessing the 1-box iDAT-44+ (not including its wall wart) is smaller than the box pictured above with the torroidal tranny in it. The torroidal tranny inside my...
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(Romy feel free to move this post)[quote user="Paul S"]N-set, I understand you do not mean to hijack the thread with the Axiom, so I actually tried to make generic and/or thread-related observations. I don't know the 6E5P, but generic issues with sp...
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Rowuk,I think that is a good thought. I think power supplies are an afterthought to most audio designers or they think about it in simplistic terms such as bigger is better. I hate to confess this in a public forum but I have found better sonics resu...
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(feel free to re/move this post to the electricity thread)As the power supply I'd regard everything from the power generator in the power plant down to the actual load.Why the power transformer should be the cutting line? I do hear your voice clearly...
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What connection do we have considering the spectra of signals on the mains and sound quality? What data do we have on what part of "mains contamination" affects sound quality? What data do we have on how power supplies should be built for the 21st ce...
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Thanks for the extensive reply. I wish I knew exactly the use the preamp is doing of them and if they could be safely replaced by those alternatives you mention. I believe they're regulators within the power supply. The problem with them is not burni...
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How about lead acid batteries :-)Only half kidding - they would be cheaper than the caps and just think, you could finally ditch those AC power troubles away.Also the amps would adore the super low impedance power supply... Still, what with that enor...
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