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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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A few months back a audio guy visited me and after a listening session I asked him if he can report any problems with sound. He reported that he hears a slightly more prolonging decay at upper bass then what he suspect to be. I knew about this effect...
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[quote user="haralanov"] Some time ago I also thought my upper bass channel is flawlessly integrated, but when I added another, symmetrically arranged UB driver (over my WR driver), I quickly understood the new configuration is MUCH more expressive a...
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Last night I was cleaning/setting the room where the hated Altec 19 were sitting and I decided play them for a while. I used a few different amps. To drive Altec 19, especially in it’s default configuration, always was a subject of debates and disag...
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[quote user="jessie.dazzle"]Is this because of the way you are driving them?When testing my one completed mid-bass horn (AK151 into 40Hz Exponential with 8" throat), and powering it from an amp that drives everything from upper bass to HF, the output...
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[quote user="Ronnie"]I noticed that my turntables make a piece of nothing out of the third movement. The PC / DAC plays with vibrating deep bass and the whole room is creaking, while the turntables play very weak LF (but beautiful flutes).[/quote]Ron...
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Actually the popular stiff Denons (103, 103R) with compliance of 5 need no less the 35g of effective mass, but even this mass will not help them. The Shelter has a “normal” compliance, I do not remember how much exactly but I think that it is somewhe...
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The whole room (L-shaped) is larger as you all noticed, but as Roman saw in my Blog , the listening space is smaller - i.e. about 6,5 x 4,5 meters with low 2,70 ceiling - and is a perennial work in progress... yes, the Stereo Lab 1000 hz is a true wa...
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Today I concluded what I suspected from the beginning: in the double-deck configuration I lost some bass. I know that Micro did some heavy mass stabilizers for their TT and some other companies did the same. People clamed that sound got “better...
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[quote user="Murataltuev"] anthony wrote:This configuration should give somewhere around 109dB @ 20Hz from 15w in room with cone movement of about +-3.5mm. That is still low excursion, and they are excellent drivers. Well, in this case, I also hav...
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Romy wrote:"...The material itself – what to use. I am wide open from any type of wood to synthetic panels (like cement panels). Perhaps it might be a combination of organic and synthetic layers..."I realize you won't be doing the work yourself, but ...
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Thanks for all the suggestions. As it happens, there were no exhibitors at the Flemings Hotel this year. But I did pop into the Stax stall before listening to anything else.In general, I was pretty disappointed with what I heard. Most of the ‘convent...
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[quote user="ayebee"]If you look at the original Bionor drawings (you can find them at klangfilm.free.fr) you see that the "bass" horn is actually made out of two sections, the outer is curved, the inner is conical and expand both horizontally and la...
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[quote user="jessie.dazzle"]Romy wrote:"...I think the key factor would be the degree to which the driver is able to decimate the LF pitches..."Pitch: The property of sound that varies with variation in the frequency of vibration.... I decided to loo...
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I guess I have found a more or less usable new configuration for ULF channel. It is 28Hz, second order, with slightly raised ULF on the transition slope. It sounds quite good. Well, I am not supposed to say this. It doesn’t sound good but it sound pr...
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(Note: I've neither seen nor heard these speakers)
Cessaro ALPHA:
TAD TD-4001 2" driver on tractrix horn with 56cm bell (approximately 250Hz). TAD claims response from 600-20KHz. Given that the midbass is essentially a direct radiator (theref...
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What you guys are missing is a grand scale of the concept. You are talking about voltages, implementation, electric chairs and the rest of irrelevant crap but I am talking about the pure inspiration from the concept. No one runs to solder anything. I...
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Keith,
Very good, thanks for the images. It would be very interning to learn what the bandwidth of the horns, the bandwidth of the drivers and the specificity of crossovers you eventually chose to use with each channel. It might take for you for a w...
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[quote user="op.9"] I agree, there is probably very little to learn luthiers that is directly applicable. However, I've always been interested in the similarities between good speaker cones and thin lacquerd spruce. Sort of a crispy pingy sound even ...
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Paul, Alinco magnets perfectly able to drop a charge "just like that" and I presume that it is what happened. If cause the environmental difficulties would not do it alone, at least for that time. Over winter I had output tubes worn up on both amps a...
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Well, I figures that while I am not sure what to do with LF section and where to locate it I will live with my woofer tower from my old listening room. They did not work well as Lower-Upper-bass channel installed next to Macondo but in odd place, han...
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Excellent news regarding this morning's discoveries. jd wrote:"...Are you able to say whether the problem is due to the horn position relative to the room, or to throat diameter relative to the driver diameter?..."Yes, a stupidly phrased question, bu...
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Romy wrote (in the "It’s mad, mad, mad... electricity." thread):"...I might not have enough power in new room for my woofer towers and it would force to use class A/B SS amp..."You've mentioned on more than one occasion how much you love what you...
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Today the electricity was wonderful and I had some time spent playing records. I was playing only my ill Shelter and I really did not like what I heard. At this point I might confirm that even the lowest bass is not where I would like it to be – it l...
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With all magnificence of the new 924++ DAC it have entered the second week of the Nichicon KZ playbook. It was completely predictable and highly expected and now the DAC sound very funny.
The bass is fully developed already. The DA924 always was phe...
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Another consideration where I am planning to make the single-stage Milq different will be the power supply for the thing. The amp will have my typical SS fast-soft rectification with mandatory “gentle enter” LCRC filter, however I consider it t...
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Thanks for the tech info, Merlin; it helps a lot, especially combined with the preferred music revelation, up the thread.I agree that the OPT figures in to the sound, all right, for better or for worse, and there is no mistaking the OTL "clarity" by ...
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[quote
user="kodomo"]In my first design, I kept them all in a vertical line.
It had one channel less back then. When I added the 1" throat JMLC 1000, I
decided, as the tweeter operates over 9.6k, the slight misalignment may not
matter. Still, I k...
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Now I have been listening the different crossovers trying to shape the new Macondo general balance. This is so fascinating ceremony that I do have a lot of fan. The things doing alone very well. I boosted upper bass and it worked now very-very well....
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I have 2nd order crossover both on the upper knee of the ob bass section and on the lower knee of the midbass section. My measurements show phase response and the summed spl is as good as it can get. Have you tried the direct servo technology or do y...
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Hello Romy,
My apologies for not getting back to you sooner… Moving to the new place has turned out to be a huge task, but worth it, as this new home actually has a place to work, not to mention a much better selection of recorded music at the local...
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