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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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N-set, I've seen and done plenty of all-concrete construction, including floors and entire roof structures, standard, pre- and post-tensioned, and also shot-crete. Ironically, concrete itself actually gets stronger over time, for many, many years (m...
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I am imagining a poured-in-place concrete shelf that is part of a large, heavy concrete shear wall. I think this would be a nice place to start dealing with the "transmitted (floor) noise". Of course the TT does not work alone but it works (or not)...
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[quote user="cv"] Well, the Cogent (Steve Schell and Rich Drysdale) boys are building just such a beast: field coil magnet, (possible) permendur polepieces for >2T, Fs 70Hz, throat - dunno, but at least 3" dia, reduced compression ratio relative t...
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Other uses for polymer concrete have spun out of its use for counter tops, which can be large enough that cracking becomes an issue. Hearths, sinks and even Roman style tubs have been constructed of this material. Variations in ...
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I've just bumped into an "architectural" installation of concrete horns built into the house:
I know that most north american houses are not built this way (concrete structure and walls) but it will at least show you what can be done.Cheers,Ric...
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hi all,thanks for your interest !yes the frame is curved, HF and MF are //yes there is a phase plug in the bass horn. This cover 80-300Hz.there is a separate infra-bass section, covering 20-80Hz.images of the bass phase plug and the infra-bass sectio...
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[quote user="Markus"]Some rather astonishing features. I'm very interested to hear it.[/quote]Hello Markus,The Castine prototype was discussed a while ago in [url=http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=6119#6119]this[/url] thread an...
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Paul, wood it is not almost for sure: there was hardly any wood and wood craftsmenavailable in Gdansk in the 50's when my building was built. Almost completely (95%)destroyed in march 1945 when pushing the Germans out, it was rebuit mostly usingreinf...
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[quote user="ulf"]Let me tell you a bit about how an why we designed the midbass horns the way we did.A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn so...
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But is the wood not sitting on concrete, through which the vibrations from elsewhere in the building are conducted? If so I suppose the wood and the concrete will make differential contributions, and you might want to couple more proximally to one bu...
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@zztopThank you, it is a good idea, but now you make me add a new research on my audio research queue. :-D If somehow I find out what are the right material characteristics for a >50 Hz horn, I may try contact my old University¹, to try to grab so...
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Let me tell you a bit about how an why we designed the midbass horns the way we did.A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound.The improvemen...
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Albert, the Adjustable Hydraulic Dampening might be effective if the vibration of floor is the factor. This is exactly what I question as I do not feel that the floor vibration is a problem. Considering the length of the waves and the amplitude of t...
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I am not and expert in wood construction, all the building we do around here is brick and mortar, but, If you get the Horn wall close to the roof you could fill that space up with that spray expanding foam. The side of the Mid bass horn will be sti...
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Hello,Can you give me some ideas for a good room? Also, audio related ideas are always welcome too.The initial plan is a room with 5m H x 10m W x 14m D (about 16,5ft H x 33ft W x 46ft D). Solid floor, probably porcelain tile (chess floor style), and ...
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[quote user="jessie.dazzle"]Romy, I followed his advice and currently rent four storage facilities; two on either side of the Atlantic. I think its time to consolidate, but I'll definitely let you know if I need to add a fifth. jd*[/quote]Jessie:T...
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So, what happens, the Musique
Concrete as the company stopped to exist and somebody Marco Henry,
who is a new person of the former Musique Concrete will continue the
line? That is fine but I think Marco Henry as well as Musique Concrete
need to t...
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Hello Marco,Nice to see you posting at romy's site. I would very much like to come listen to your speakers when you are ready for auditions. I am very happy with my 320hz Musique concrete horns, and am still sorry you didn't have the time to build ...
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Musique Concrete stopped selling horns a while ago and are now manufacturers of commercial horn loudspeakers.As for the "Grande Castine", I think that the MF section is in fact the MF/LF section and the frame is indeed curved.Cheers,Ric...
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Polymer concrete is also sand and epoxy. Very common in the industry as machine base, and not unknown to audio people: http://www.auditorium-23.de/Verdier/Platine.html...
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Jessie, I agree in spades. You could play around trying to "tune" that thing for the rest of your life.But then, who is going to hear serious problems with something that was such a pain and expense to build and install?More likely is that...
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Romy, I often work with materials like this, for specialized restoration and reinforcement projects, and I have used it for my own speakers, as well. You mention ~ 1/2" thickness, and indeed thickness is an important consideration in selecting most o...
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I have to echo Paul's sentiments.All I have heard about the hum issue in my PurePower unit is that "we are working on that" but nothing concrete or any explanations given...It would be great to hear something about it.Adrian...
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Hi everyone,Let's go back in 1948 ...../////..... here we are, 1948, Pierre Schaeffer (a scientist) wrote a book (traité des objets musicaux) and make research on what are the new area to explore since the possibilty to record sounds. The 3rd musical...
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If you're willing to travel to Notown I can lend you a pair of K-Horn bass bins loaded with Altec 803a.They are not Jubilee and you would probably want to augment it with some sub-bass but maybe not since I only experienced them in a frame house wit...
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Clark, How sad that I didn't know this "nothing" 15 years ago (including yes the effects of polarity and phase), but I'm always the last to know. And how strange that following the logic of this "nothing" (and this thread) has suggested a number of...
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[quote user="zztop7"]Once you have all these contacts come-up with a concrete mix, let me see it if you would like my opinion. I will let you know if I agree or disagree & possible improvements.IMPORTANT: Is this an existing room? Is this room ...
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I have heard of this but was rather suspicious simply because they are also marketing digital cables "which make digital sound like analogue" Where have we heard that before? What I read sounded not that different from the supposed operation and effe...
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[quote user="decoud"] None of these seems to apply in your case because you have a properly levelled installation, directly on concrete [/quote]If I had it on a concrete I'd be very happy! On wood it is, mafrend, on wood.[quote user="decoud"]I see th...
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Considering the minute amount of energy "created" (transformed) in a phono cartridge, perhaps some systems would truly benefit from geophysical orientation. Heck, in the days of expensive picture tube computer monitors there was a different tube for ...
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