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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I'm going to try and build a Melquiades type amplifier (with some help from friends) following the advice given above to make it as simple as possible. I could spend more money for "different" transformer, but I will ask you for advice on...
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Years ago, when I visited the Cogent guys, Rich was working on one of their big drivers. The diaphragm was big and even thick and heavy, as compression driver diaphragms go. Of course they used 300B amps, and the bottom end had the "sewer pipe" type ...
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It is done with own vision and very consistant with own vision. However, I’m not position to assess how it might sound. This guy drives Lowthers and believes that he is a belly-button of universe. I do not case about nether 300B sound not Lowthers so...
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Jim, what is operational point of the 6E5P, what it drivers (how it coupled) and how do you bias the 5E5P? BTW, the clipping at the bottom is very good, very symmetrical. Try to measure which stage clips first: the driver or the output stage. One m...
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[quote user="Romy the Cat"]In fact you can model the great sound for very, very small rooms (headphones) with existing direct radiators, have great result and no need for horns.[/quote]Yes, this is exactly what I've attempted to do. The rooms in the ...
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Thanks for your thoughts.What is the TESLA battery? You mean the monster thing they use in the cars? Now that would be one hell of a battery!If I do it i will get SLA SGMs - gigantic LiFePo makes me nervous - I try to stay as far away as I can from...
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[quote user="electronluv"]are you asking if i like higher impedance tubes with my drivers i have always love the sound of imac tubes round plate triodes !!! i change amps alot right now i im running 75tl amp for highs and a 300B for bass drivers . ...
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In case there's any confusion, it was the Avatons in Munich (and not the Animas). I took a good listen to them on Friday, and wasn't overly impressed. I spent a long time there yesterday though and thought they sounded better than anything else I'd h...
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Yes, I totally agree. In my old place, I had the Druids working in FR with the Berning Siegfried 300B, and they sounded exactly as you say.But I'm hoping that the Berning will cope better driving the Druids with a high-pass filter set to around 150Hz...
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DHT amps can sound good or maybe charming is the right word, but I believe it is due to an error related to the concept of oops described elsewhere on this site.
This is the result of the filaments resonating and contributing with a sense of life an...
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Could anyone here get through the whole spiel? I found it rough going at first and then impossible once I saw the pictures of the product. The immediate sense I could not escape is that it is (at this point, anyway) more about a "total marketing pl...
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and not very encouraging. The set up was as follows: a Lowther ex4 playing from ~12k down in a big ~100Hz tratrix. A Murata up on top, and a 15" Beyma on the bottom. The Beyma is in an Onken so the results may not be fully indicative of performance i...
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[quote user="nl"] Gordon Rankin of Wavelength Audio did a series of one-stage DHTs with a step-up transformer input about ten years ago. I think they were called the Mercury series. By all accounts, they sounded good, but of course had limited gain, ...
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Either my ears have gone bad or I must be the luckiest user of pure power regenerators. Have been using three for four months now and am still bowled over the improvement in my system. No matter what time of day I listen it sounds superb, but I do no...
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Yeah, so the closeness of the grids results in a higher current gain. So what? What is the relationship between gain and sonics? Are you saying that all high gm tubes sound better than low gm tubes? And does that include 300B ...
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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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Paul, would you think 6336 will be more stable/predictable?Have you had any experience with it?30H: sorry, forgot to mention that the PP pair is autobiasedwith a common 900R resistor...EL34: indeed it's a very popular tube for driving Stax electrosta...
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I always do call and speak with people. This is Internet and they write whatever they want! I always would like to confirmer that behind the web proclamations there is something else then proclamations. BTW, this Denis sounded perfectly complement an...
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Merry Christmas!Nice woodworking job on your speakers.I have a couple if questions:Why did you select the drivers that you did?What made you select one horn for the midrange but for nothing else?What process did you use to select the crossover points...
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If I am working on AC quality because the AC quality in the big building is very very bad.My apartment is in a big complex shared between 200 apartments + 7 big elevator and ...This Building has three phase AC power , in most homes the AC is better b...
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Romy, I have some (strong) opinions on DHTs concerning filament supplies versus specific tube types. For virtually ANY 45 triode, AC is my preferred option. Still, not all 45 triodes will be acceptable for my use, hence weeding thru many of them to ...
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Hi to everybody,I have used those caps: teflon V-caps, AN copper, Jensen copper, Siemens at the signal path of a tube power amplifier (300b SE) application. V-caps are technically very good, very clear, less microphonics, but missing s...
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Paul,
Ok, I would agree with this. The power handling is the factor that I forgot to mention. The Japanese home drivers are rated for a few watts vs. the pro driver are rated for hundreds watts. BTW, some of older pro drivers (like my Vitavox) wer...
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Hi Romy,Great site, got lost here for a while now searching WE13a after building a WE91a 300B set, quess have to reconsider sell and wil look in to the Melq's for the near future... Also it even got me a little in to horns...For now i have a question...
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Iraschwips, I do not think that it has anything
to do with impedance at all. You might have sub 1R impedance of your
loudspeakers and perfectly compensate it by wiring a custom transformer that
will perfectly work against lower impedances. I would...
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Thanks, Roman... I strangely (?!?) feel me like a schoolboy at his first primary schoolday... virtually ALL my (limited) audio knowledge, vanished... and I'm dealing with brand-new problems, like a crossover with fixed slopes and cut-off frequencies ...
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I recieved and accepted an invitation to hear an earlier version of the Cogent speakers, and I was subsequently asked for a considered opinion of the sound. I guess the designers had read from my posts various criticisms of horns in genera...
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Hi!Sorry for not spotting this thread before. I'm the member of this forum and I read it from time to time. I don't know what do you mean with "he is from diyaudio.com site"? I'm member of a few formums and newsgroups but I wouldn't say that I'm from...
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Hello Gera,First thing I would do is get rid of the active Xover, in my experience they mud everything up. preamps are very important and this is like a double preamp with a lot of gain stages. For bass you can maybe use it. I use a separate Xover...
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This thread has been pretty interesting overall. I've read most of it and would at least like to provide some feedback on the technical side of designing with the 45 and 2A3 DHTs... at least from my personal experience. A few years back I decid...
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