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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="Romy the Cat"]. What was your resonant frequency after loading? The 416 are 25Hz drivers, after loading and with two drivers it might be deep in teens. From the picture it looks like you keep the back chamber of extra large space, or eve...
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What I think I would need is microscopic pneumatic valve that I would be able to stick into my back chamber and that would have a little-bolt that would allow adjusting the diameter of the leaking “port”... Sure, it would be fun to have the valve to ...
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A few questions. What driver is it? It looks like it is 15 Vitavox, is it 151 or 15/40? What the resonant frequency of the horn and driver with no back chamber? The most important: how the hell all of it sound. I do not be believed that you did not h...
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What is the purpose of having the flexibility to re-configure from straight to J horn?This thing will be large and massive enough that physically moving it from one configuration to another will be difficult and require a lot of effort. Conceptually...
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[quote user="JJ Triode"]Romy,You refer to the D minor concerto as a "piano concerto," but wasn't it originally composed for harpsichord, like all his other keyboard works? (Except organ of course.) Anyway, I have a harpsichord recording of the D...
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[quote user="MochaMike"]A stereo three way horn system with a dual concentric 15" woofers backloaded to 50 cycles and front loaded with a short round tractrix horn 200-800 cycles handed off to the concentric 2" com...
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From the perspective of pumping of atmospheric pressure the ALE bass drivers might be more capable transducers. It or might not be so as well. To get 40Hz at 110dB in 5” it would take some excursion. I am sorry but you can’t bend the law o...
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Thank, Manolis, it did address some concerns. I think I even know what you did with the MF driver. You were able to get 50Hz out of this looks like horn? This is impressive. The boundaries-loaded horns sometimes allow doing away with the horn siz...
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[quote user="anthony"]You get three octaves of horn loading and then the horn attenuates the signal at 24db/octave below the lower knee and 6dB/octave above the upper knee. So a horn with a lower knee of 42Hz will have an upper knee of about 336Hz r...
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Hmmm... I guess you have to start somewhere, and it did originally seem to me that the "headwaters" of the divergent projects were the "original accidental" Dannoys, with the disconnected Scanspeak 10" riding shotgun in a weirdly-connected chamber of...
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.... in home systems for Room correction and general system EQFolks,This is from my own Yahoo group, but may be of interest here....Since writing this I have in fact changed my speakers to dipoles and do not currently use a PADEQ (it will return thou...
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[quote user="Romy the Cat"]The biggest problem that usually people face when they listen the middbas horn is that people tend to make the middbas horns too short. In the short horn the driver shot right through the horn and the LF go not “get loaded”...
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To me the big green drivers in the midbass horn look like old Siemens Klangfilm or Telefunken (or other German manufacturer) 10 inch units. Maybe 12 inch... I had a pair of 8 inch Klangfilm once and they do have interesting tone across a couple of oc...
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II would like to pass a word of warning about the C-15W driver. I do not know this driver but it looks like it has dual voice coil. This might be a hell or blessing. On a paper the idea sound very interesting but unfortunately when I seen it it never...
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[quote user="green heron"] I'm happy with my results midrange on up at the moment, but I'd like more slam from the midbass horns. The backchamber may be a bit too large, so I'm planning to experiment with the cabinet volume. Do you have any su...
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Moron it is then...Anyways, seeing the back chamber of my midbass horn, you would say that its way to big, no? And you would recommend me to proceed with a similar tuning process as you describe in this link?http://audio-db.info/AudioDB/BazaPraktiki/...
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Eduardo,
Thanks for your thoughts and illustrations. I also do not feel that loosely-suspended very small metal cone might be a right solution for midbass. To develop LF you need pressure, pressure is surface by exertion – there is nothing els...
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[quote user="Romy the Cat"] However, do not use word “brake” as it if from the words of mass-centric drivers. Horns are not about mass and exertion but about velocity and consequential pressure, so in horns there are no brakes but rather damping over...
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jd wrote :
"...I may have come up with a way of making the BIG horns fairly painlessly..."
Yes well, I really must give up the absinthe !Lbjefferies7 wrote :"...Not "end-of-life"in the sense that it will be built and then I...
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That's horribly disappointing for now but I think Jessie is right.Firstly, as you essentially said, I wonder if the horns are coupling into the room such that you actually have much bigger devices than you thought... you are actually sitting inside t...
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[quote user="Romy the Cat"]1) The foams from back chamber pushed itself through the window of basket and touched the driver cone. Sonically it is very likely but knowing HOW I did the thing I think (hope) it did not happen. Also, both horns hav...
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I think the usage of Romys Injection Channel has misguided you to think it was implemented because of a certian lack of tone or some sterile sound, nothing of the sort, I cannot blame you for not having listened to Romys system, but theo...
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Here's how I'd make a hard rear cover/rear chamber.I describe the process in detail, as it is a good investment of my time; I expect to have a similar condition and requirement for my own mid-bass horns (intended for use with AK-151s).This approach c...
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[quote user="Romy the Cat"]With lower then rate frequency Fs is also
is very simple. If you refuse to make own experiment and confirm the unloading
the bass from horn make difference then try to look at the subjects purely intellectually:
why you ...
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I’ve been harassing my horn-maker for quite a while with an idea to go for straight, no-cheating 45-50Hx horn. We discussed it countless times and sometime probably we would go for this, and particularly if I figure out how to resolve the delays prob...
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In the linked there above “Barn Conversion - James' Project” I have expressed my attitude toward low frequency bass. I certainly not “against” bass horn it but have “concerns”. The “open bottom” concept that I invented for myself is always make me to...
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[quote user="jessie.dazzle"] There should be no danger in running the S3s down to 500Hz; I am currently running a pair of S2s (same diaphragm as S3) down to 450Hz, 1st order, no problem.
The system is in a room that measures around 80m² with a 3m-h...
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OK, as now, I see no problem to conclude to the project successfully in 1-2 weeks. The horn give much less problem then was expected, as my progress with crossover going on the midbass horns sound more and more disciplinized. Today I will be expl...
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[quote user="jessie.dazzle"]Rakesh,Two things I see that may or may not turn out to be an issue:1) The relatively narrow stance of the front wheels; depending on how heavily you load the top of the frame, stability could be a bit on the limit when mo...
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Well, when we are talking about Cogent we need clearly differentiate two things: the Cogent’s drivers and the Cogent’s installation. The problem is that since Cogent’s drivers are something so called “compression drivers” then their performance might...
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